compression ratio FORD GRANADA 1985 Service User Guide

REF•6
Engine fails to rotate when attempting to start
m mBattery terminal connections loose or corroded (Chapter 1).
m mBattery discharged or faulty (Chapter 5).
m mBroken, loose or disconnected wiring in the starting circuit
(Chapter 5).
m mDefective starter solenoid or switch (Chapter 5).
m mDefective starter motor (Chapter 5).
m mStarter pinion or flywheel/driveplate ring gear teeth loose or broken
(Chapters 2 or 5).
m mEngine earth strap broken or disconnected.
Starter motor turns engine slowly
m
mPartially-discharged battery (recharge, use jump leads, or push
start) (Chapter 5).
m mBattery terminals loose or corroded (Chapter 1).
m mBattery earth to body defective (Chapter 5).
m mEngine earth strap loose.
m mStarter motor (or solenoid) wiring loose (Chapter 5).
m mStarter motor internal fault (Chapter 5).
Engine rotates, but will not start
m
mFuel pump inertia switch tripped (electric pump) (Chapter 4).
m mFuel tank empty.
m mBattery discharged (engine rotates slowly) (Chapter 5).
m mBattery terminal connections loose or corroded (Chapter 1).
m mIgnition components damp or damaged (Chapters 1 and 5).
m mBroken, loose or disconnected wiring in the ignition circuit
(Chapters 1 and 5).
m mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mFuel injection system fault (Chapter 4).
m mMajor mechanical failure (eg broken timing chain) (Chapter 2).
Engine difficult to start when cold
m
mBattery discharged (Chapter 5).
m mBattery terminal connections loose or corroded (Chapter 1).
m mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mFuel injection system fault (Chapter 4).
m mOther ignition system fault (Chapters 1 and 5).
m mLow cylinder compressions (Chapter 2).
Engine difficult to start when hot
m
mAir filter element dirty or clogged (Chapter 1).
m mFuel injection system fault (Chapter 4).
m mLow cylinder compressions (Chapter 2).
Starter motor noisy or excessively-rough in
engagement
m mStarter pinion or flywheel/driveplate ring gear teeth loose or broken
(Chapters 2 or 5).
m mStarter motor mounting bolts loose or missing (Chapter 5).
m mStarter motor internal components worn or damaged (Chapter 5).
Engine starts, but stops immediately
m
mLoose or faulty electrical connections in the ignition circuit
(Chapters 1 and 5).
m mVacuum leak at the throttle body or inlet manifold (Chapter 4).
m mFuel injection system fault (Chapter 4).
Engine idles erratically
m
mCarburettor stepper motor plunger dirty (2.0 litre only) (Chapter 5)
m mIncorrectly-adjusted idle speed (Chapter 4).
m mAir filter element clogged (Chapter 1).
m mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mUneven or low cylinder compressions (Chapter 2).
m mCamshaft lobes worn (Chapter 2).
m mFuel injection system fault (Chapter 4).
Engine misfires at idle speed
m
mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mFaulty spark plug HT leads (Chapter 5).
m mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mFuel injection system fault (Chapter 4).
m mDistributor cap cracked or tracking internally, where applicable
(Chapter 5).
m mUneven or low cylinder compressions (Chapter 2).
m mDisconnected, leaking, or perished crankcase ventilation hoses
(Chapter 4).
Fault Finding
spark plugs may only be pointers to some underlying fault.
The pages which follow provide an easy-reference guide to the more
common problems which may occur during the operation of the
vehicle. These problems and their possible causes are grouped under
headings denoting various components or systems, such as Engine,
Cooling system, etc. The Chapter and/or Section which deals with the
problem is also shown in brackets. Whatever the fault, certain basic
principles apply. These are as follows:
Verify the fault. This is simply a matter of being sure that you know
what the symptoms are before starting work. This is particularly
important if you are investigating a fault for someone else, who may
not have described it very accurately.
Don’t overlook the obvious. For example, if the vehicle won’t start, is
there fuel in the tank? (Don’t take anyone else’s word on this particular
point, and don’t trust the fuel gauge either!) If an electrical fault isindicated, look for loose or broken wires before digging out the test
gear.
Cure the disease, not the symptom. Substituting a flat battery with a
fully-charged one will get you off the hard shoulder, but if the
underlying cause is not attended to, the new battery will go the same
way. Similarly, changing oil-fouled spark plugs for a new set will get
you moving again, but remember that the reason for the fouling (if it
wasn’t simply an incorrect grade of plug) will have to be established
and corrected.
Don’t take anything for granted. Particularly, don’t forget that a
“new” component may itself be defective (especially if it’s been rattling
around in the boot for months), and don’t leave components out of a
fault diagnosis sequence just because they are new or recently-fitted.
When you do finally diagnose a difficult fault, you’ll probably realise
that all the evidence was there from the start.
1 Engine
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Engine misfires throughout the driving speed range
m mFuel filter choked (Chapter 1).
m mFuel pump faulty, or delivery pressure low (Chapter 4).
m mFuel tank vent blocked, or fuel pipes restricted (Chapter 4).
m mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mFaulty spark plug HT leads (Chapter 5).
m mDistributor cap cracked or tracking internally (Chapter 5).
m mFaulty ignition coil (Chapter 5).
m mUneven or low cylinder compressions (Chapter 2).
m mFuel injection system fault (Chapter 4).
Engine hesitates on acceleration
m
mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mFuel injection system fault (Chapter 4).
Engine stalls
m
mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mFuel filter choked (Chapter 1).
m mFuel pump faulty, or delivery pressure low (Chapter 4).
m mFuel tank vent blocked, or fuel pipes restricted (Chapter 4).
m mFuel injection system fault (Chapter 4).
Engine lacks power
m
mFuel filter choked (Chapter 1).
m mFuel pump faulty, or delivery pressure low (Chapter 4).
m mUneven or low cylinder compressions (Chapter 2).
m mWorn, faulty or incorrectly-gapped spark plugs (Chapter 1).
m mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mFuel injection system fault (Chapter 4).
m mBrakes binding (Chapters 1 and 10).
m mClutch slipping (Chapter 6).
Engine backfires
m
mVacuum leak at the throttle body, inlet manifold or associated hoses
(Chapter 4).
m mFuel injection system fault (Chapter 4).
Oil pressure warning light illuminated with engine
running
m mLow oil level, or incorrect oil grade (Chapter 1).
m mFaulty oil pressure sensor (Chapter 2).
m mWorn engine bearings and/or oil pump (Chapter 2).
m mExcessively high engine operating temperature (Chapter 3).
m mOil pressure relief valve defective (Chapter 2).
m mOil pick-up strainer clogged (Chapter 2).
Note:Low oil pressure in a high-mileage engine at tickover is not
necessarily a cause for concern. Sudden pressure loss at speed is far
more significant. In any event, check the gauge or warning light sender
before condemning the engine.
Engine runs-on after switching off
m mExcessive carbon build-up in engine (Chapter 2).
m mExcessively high engine operating temperature (Chapter 3).
Engine noises
Pre-ignition (pinking) or knocking during acceleration or
under load
m mIgnition timing incorrect/ignition system fault (Chapters 1 and 5).
m mIncorrect grade of spark plug (Chapter 1).
m mIncorrect grade of fuel (Chapter 1).
m mVacuum leak at throttle body, inlet manifold or associated hoses
(Chapter 4).
m mExcessive carbon build-up in engine (Chapter 2).
m mFuel injection system fault (Chapter 4).
Whistling or wheezing noises
m
mLeaking inlet manifold or throttle body gasket (Chapter 4).
m mLeaking exhaust manifold gasket (Chapter 4).
m mLeaking vacuum hose (Chapters 4 and 10).
m mBlowing cylinder head gasket (Chapter 2).
Tapping or rattling noises
m
mWorn valve gear, timing chain, camshaft or hydraulic tappets
(Chapter 2).
m mAncillary component fault (water pump, alternator, etc) (Chapters 3,
5, etc).
Knocking or thumping noises
m mWorn big-end bearings (regular heavy knocking, perhaps less under
load) (Chapter 2).
m mWorn main bearings (rumbling and knocking, perhaps worsening
under load) (Chapter 2).
m mPiston slap (most noticeable when cold) (Chapter 2).
m mAncillary component fault (water pump, alternator, etc) (Chapters 3,
5, etc).
REF•7Fault Finding
2Cooling system
Overheating
m
mAuxiliary drivebelt broken or incorrectly adjusted (Chapter 1).
m mInsufficient coolant in system (Chapter 1).
m mThermostat faulty (Chapter 3).
m mRadiator core blocked, or grille restricted (Chapter 3).
m mElectric cooling fan or thermostatic switch faulty (Chapter 3).
m mViscous-coupled fan faulty (Chapter 3).
m mIgnition timing incorrect, or ignition system fault (Chapters 1 and 5).
m mInaccurate temperature gauge sender unit (Chapter 3).
m mAirlock in cooling system (Chapter 3).
Overcooling
m
mThermostat faulty (Chapter 3).
m mInaccurate temperature gauge sender unit (Chapter 3).
External coolant leakage
m
mDeteriorated or damaged hoses or hose clips (Chapter 1).
m mRadiator core or heater matrix leaking (Chapter 3).
m mPressure cap faulty (Chapter 3).
m mWater pump internal seal leaking (Chapter 3).
m mWater pump-to-block seal leaking (Chapter 3).
m mBoiling due to overheating (Chapter 3).
m mCore plug leaking (Chapter 2).
Internal coolant leakage
m
mLeaking cylinder head gasket (Chapter 2).
m mCracked cylinder head or cylinder block (Chapter 2).
Corrosion
m
mInfrequent draining and flushing (Chapter 1).
m mIncorrect coolant mixture or inappropriate coolant type (Chapter 1).
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REF•13Glossary of Technical Terms
Catalytic converterA silencer-like device in
the exhaust system which converts certain
pollutants in the exhaust gases into less
harmful substances.
CirclipA ring-shaped clip used to prevent
endwise movement of cylindrical parts and
shafts. An internal circlip is installed in a
groove in a housing; an external circlip fits into
a groove on the outside of a cylindrical piece
such as a shaft.
ClearanceThe amount of space between
two parts. For example, between a piston and
a cylinder, between a bearing and a journal,
etc.
Coil springA spiral of elastic steel found in
various sizes throughout a vehicle, for
example as a springing medium in the
suspension and in the valve train.
CompressionReduction in volume, and
increase in pressure and temperature, of a
gas, caused by squeezing it into a smaller
space.
Compression ratioThe relationship between
cylinder volume when the piston is at top
dead centre and cylinder volume when the
piston is at bottom dead centre.
Constant velocity (CV) jointA type of
universal joint that cancels out vibrations
caused by driving power being transmitted
through an angle.
Core plugA disc or cup-shaped metal device
inserted in a hole in a casting through which
core was removed when the casting was
formed. Also known as a freeze plug or
expansion plug.
CrankcaseThe lower part of the engine
block in which the crankshaft rotates.
CrankshaftThe main rotating member, or
shaft, running the length of the crankcase,
with offset “throws” to which the connecting
rods are attached.
Crocodile clipSee Alligator clipDDiagnostic codeCode numbers obtained by
accessing the diagnostic mode of an engine
management computer. This code can be
used to determine the area in the system
where a malfunction may be located.
Disc brakeA brake design incorporating a
rotating disc onto which brake pads are
squeezed. The resulting friction converts the
energy of a moving vehicle into heat.
Double-overhead cam (DOHC)An engine
that uses two overhead camshafts, usually
one for the intake valves and one for the
exhaust valves.
Drivebelt(s)The belt(s) used to drive
accessories such as the alternator, water
pump, power steering pump, air conditioning
compressor, etc. off the crankshaft pulley.
DriveshaftAny shaft used to transmit
motion. Commonly used when referring to the
axleshafts on a front wheel drive vehicle.
Drum brakeA type of brake using a drum-
shaped metal cylinder attached to the inner
surface of the wheel. When the brake pedal is
pressed, curved brake shoes with friction
linings press against the inside of the drum to
slow or stop the vehicle.
EEGR valveA valve used to introduce exhaust
gases into the intake air stream.
Electronic control unit (ECU)A computer
which controls (for instance) ignition and fuel
injection systems, or an anti-lock braking
system. For more information refer to the
Haynes Automotive Electrical and Electronic
Systems Manual.
Electronic Fuel Injection (EFI)A computer
controlled fuel system that distributes fuel
through an injector located in each intake port
of the engine.
Emergency brakeA braking system,
independent of the main hydraulic system,
that can be used to slow or stop the vehicle if
the primary brakes fail, or to hold the vehicle
stationary even though the brake pedal isn’t
depressed. It usually consists of a hand lever
that actuates either front or rear brakes
mechanically through a series of cables and
linkages. Also known as a handbrake or
parking brake.EndfloatThe amount of lengthwise
movement between two parts. As applied to a
crankshaft, the distance that the crankshaft
can move forward and back in the cylinder
block.
Engine management system (EMS)A
computer controlled system which manages
the fuel injection and the ignition systems in
an integrated fashion.
Exhaust manifoldA part with several
passages through which exhaust gases leave
the engine combustion chambers and enter
the exhaust pipe.
F
Fan clutchA viscous (fluid) drive coupling
device which permits variable engine fan
speeds in relation to engine speeds.
Feeler bladeA thin strip or blade of hardened
steel, ground to an exact thickness, used to
check or measure clearances between parts.
Firing orderThe order in which the engine
cylinders fire, or deliver their power strokes,
beginning with the number one cylinder.
Flywheel A heavy spinning wheel in which
energy is absorbed and stored by means of
momentum. On cars, the flywheel is attached
to the crankshaft to smooth out firing
impulses.
Free playThe amount of travel before any
action takes place. The “looseness” in a
linkage, or an assembly of parts, between the
initial application of force and actual
movement. For example, the distance the
brake pedal moves before the pistons in the
master cylinder are actuated.
FuseAn electrical device which protects a
circuit against accidental overload. The typical
fuse contains a soft piece of metal which is
calibrated to melt at a predetermined current
flow (expressed as amps) and break the
circuit.
Fusible linkA circuit protection device
consisting of a conductor surrounded by
heat-resistant insulation. The conductor is
smaller than the wire it protects, so it acts as
the weakest link in the circuit. Unlike a blown
fuse, a failed fusible link must frequently be
cut from the wire for replacement.Catalytic converter
Crankshaft assembly
Accessory drivebelts
Feeler blade
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A
ABS module - 10•11
Accelerator pump diaphragm renewal - 4•12
Accessory shops - 0•8
Acknowledgements - 0•4
Aerial pre-amplifier - 13•22
Air bags - 0•5
Air charge temperature sensor - 5•12
Air cleaner - 1•16, 4•4
Air conditioner - 1•14, 1•15, 3•2, 3•9
Air temperature sensor - 13•18
Alarm signal buzzer - 13•23
Alarm system horn - 13•23
Alternator - 3•7, 5•4
Anti-roll bar - 11•9, 11•12
Anti-theft alarm - 13•22, 13•23
Antifreeze mixture - 3•2
Asbestos - 0•5
Ashtray light - 13•8
Automatic choke - 1•16, 4•10, 4•12
Automatic transmission- 1•11, 1•15, 2B•6,
2B•7, 7B•1et seq, REF•8
Automatic transmission brake band
adjustment - 1•19
Automatic transmission selector light - 13•9
Auxiliary drivebelt - 1•12
Auxiliary driving light - 13•4, 13•6
Auxiliary shaft - 2A•9, 2A•14, 2A•16
Auxiliary warning system components - 13•18
B
Backrests - 12•19, 12•18
Battery - 0•5, 1•8, 1•13, 5•3, 5•4
Battery will not hold a charge for more than
a few days - REF•11
Bleeding the brakes - 10•3
Bleeding the power steering - 11•3
Body corrosion - 0•14
Body damage - 12•2, 12•4
Body electrical system- 13•1et seq
Bodywork and fittings- 12•1et seq
Bodywork repairs - 12•3
Bonnet - 12•4, 12•9
Bonnet release cable - 12•6
Booster battery (jump) starting - 0•10
Boot lid - 12•5
Boot lid lock barrel - 12•7
Brake band adjustment - 1•19, 7B•3
Brake fluid - 1•7, 1•19
Brake hydraulic system - 10•3
Brake pedal effort high to stop vehicle - REF•9
Brake pedal feels spongy when depressed
- REF•9
Brake pedal pulsates when braking hard -
REF•10
Brake pedal travel excessive - REF•9
Brake pipe and hoses - 1•15, 10•10
Brakes binding - REF•10
Braking system- 0•13, 10•1et seq, REF•9
Bulb failure module - 13•19
Bulbs - 13•4, 13•7
Bumper - 12•10, 12•11
Burning - 0•5
C
Cables - 3•8, 4•7, 6•3, 7B•3, 10•11
Caliper - 10•5, 10•6
Camshaft - 2A•7, 2A•14, 2A•17, 2B•14,
2C•12, 2C•13, 2C•15
Camshaft drivebelt - 1•20
Capacities - 1•3
Carbon canister - 4•23
Carburettor stepper motor - 5•10
Catalytic converter - 4•4
Central locking motor - 13•13
Central locking system inoperative, or
unsatisfactory in operation - REF•11
Centre console - 12•15
Cigarette lighter - 13•10
Clock - 13•9, 13•10
Clutch- 6•1et seq, REF•8
Clutch fails to disengage (unable to select
gears) - REF•8
Clutch pedal travels to floor - REF•8
Clutch release bearing and arm - 6•4
Clutch slips (engine speed increases, with
no increase in vehicle speed) - REF•8
CO emissions (mixture) - 0•14
Compliance bushes - 11•9
Compression test - 2A•20, 2B•18, 2C•21
Compressor drivebelt - 3•9
Computer module and bulb - 13•18
Condenser fan and motor - 3•10
Connecting rods - 2A•11, 2A•13, 2A•15,
2B•17, 2C•12, 2C•14, 2C•16
Console light - 13•9
Contents - 0•2
Control assembly - 13•19
Control module - 10•13
Control switches - 13•19
Control units - 13•13
Conversion factors - REF•16
Coolant - 1•6, 1•20
Coolant hoses - 2C•7
Coolant leakage - REF•7
Coolant level switch - 13•18
Coolant temperature sensor - 5•10
Cooling, heating and ventilation systems-
3•1 et seq, REF•7
Corrosion - REF•7
Courtesy light - 13•7
Crankcase ventilation system - 1•19,
2A•12, 2B•3, 2C•15
Crankshaft and bearings - 2A•11, 2A•12,
2A•15, 2B•17, 2B•18, 2C•12, 2C•14,
2C•15
Crankshaft oil seals - 2A•10, 2B•15, 2C•12
Crankshaft speed/position sensor - 5•11
Crossmember insulator - 11•12
Crushing - 0•5
Cushion - 12•18
Cylinder block and bores - 2A•13
Cylinder bores - 2C•14
Cylinder head - 2A•6, 2A•8, 2A•14, 2A•17,
2B•10, 2B•11, 2B•14, 2C•8, 2C•13,
2C•19
D
De-ice thermostat - 3•10
Decarbonising - 2A•14
Dents in bodywork - 12•2
Direction indicator - 13•5, 13•11
Discs - 10•3, 10•4, 10•8
Distributor - 5•5
Door exterior handle - 12•6
Door interior trim panel - 12•7
Door latch assembly - 12•6
Door lights - 13•7
Door lock barrel - 12•6
Door pillar switch - 13•12
Door speakers - 13•21
Door striker plate - 12•6
Door switch - 13•18
Door weatherstrip - 12•7
Door window - 12•8, 12•9
Doors - 0•12, 12•4, 12•7, 12•8, 12•9, 12•10
Downshift mechanism - 7B•3
Drivebelts - 1•12, 1•20, 3•7, 3•9, 11•6
Driveshaft - 1•15, 9•3
Drivetrain - 1•16
E
Earth fault - 13•4
EEC IV module - 5•9
Electric shock - 0•5
Electric windows inoperative, or
unsatisfactory in operation - REF•11
Electrical system - 0•12, 1•8, REF•10
Electronic ignition systems - 5•3
Engine- 2A•1 et seq, 2B•1 et seq, 2C•1 et
seq, REF•6
Engine backfires - REF•7
Engine bay light - 13•8
Engine difficult to start - REF•6
Engine dismantling - 2B•8
Engine electrical systems- 5•1et seq
Engine fails to rotate when attempting to
start - REF•6
Engine hesitates on acceleration - REF•7
Engine idles erratically - REF•6
Engine lacks power - REF•7
Engine management control module - 5•9
Engine management system relays - 5•11
Engine misfires - REF•6, REF•7
Engine mountings - 2A•11, 2B•8, 2C•12
Engine oil and filter - 1•6, 1•9
Engine rotates, but will not start - REF•6
Engine runs-on after switching off - REF•7
Engine stalls - REF•7
Engine starts, but stops immediately -
REF•6
Engine will not start in any gear, or starts in
gears other than Park or Neutral -
REF•9
Entertainment console - 13•22
Environmental considerations - REF•4
ESC II module - 5•3, 5•9
Exhaust emission checks - 0•14
Exhaust gas oxygen (HEGO) sensor - 4•22
Exhaust manifold(s) - 4•21
Exhaust system - 0•13, 1•10, 4•22
Expansion tank - 3•7
IND•1Index
Note: References throughout this index are in the form - “Chapter number” • “page number”
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