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Discussion Starter · #1 ·
hi all i have a 1993 volvo 850se and its dead,
one sunday morning was about to go out and it just would not start,
so spent alot of money changing spark plugs ht leads rotor arm,distrib cap
and still nothing,checked battery seems fine,
the car turns just doesnt want to start,
i got a mechanic to look at it(not used to volvos at all) and he said my cylinder head has gone,
is there any way of telling this without taking it to a volvo garage?
thanks
brandon
 

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Remove the oil cap Have someone turn the car over and make sure you see tha cams moving.Your timing belt hasn't broke has it?
 

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Discussion Starter · #3 ·
timing belts fine,i will check cams tomorrow,thanks for your help
do you happen to have codes for A7?
 

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Did you pull codes?If you did post them and then i will let you know.
 

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Discussion Starter · #5 ·
QUOTE(Tech @ Nov 11 2004, 12:41 AM)Did you pull codes?If you did post them and then i will let you know.
[snapback]1103[/snapback]​


i got 1-3-4 or 1-3-2 on A7 cant remember which one it was now,
do you have english diagram on which ht lead is supposed to go where please?
 

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Sorry its taking so long its been hell at work.Ill have it tomorrow.Where did you get the dist cap and wires from.If the are Volvo parts the dist cap has the cyl numbers stamped on it.#1 cyl is always on the side of the timing belt and #5 is on the trans side.Try holding the gas pedal to the floor and try cranking it over not letting go of the gas pedal.Some times the lifters bleed down so while cranking the valves are not opening.So start cranking and if it seams as it is going to start just keep cranking till it starts.You might have to hook a battery charger to it.
 

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Discussion Starter · #9 ·
thanks in advance for looking for me,ive tried the pedal to the floor even with battery booster but still no joy,
with the dist cap its on side of engine so there isnt really a close side to the timing belt,
ive seen to diagrams on firing order but both were different looking at the cap number one was bottom left but on another it was top left.....yep i know starting to get annoying.......lol
 

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The spark plug by the timing belt is #1 cylinder.Look on your old cap and see if it is numbered if so make sure it matches on the new cap.Also try unplugging your mass flow sensor and try starting.If the mass flow sensor is bad and you unplug it it should start.
 

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Discussion Starter · #11 ·
now you know what im going to ask next....lol
where abouts is the mass flow sensor?
sorry for being a pain in the backside

thanks
brandon
 

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The mass flow sensor is in the air filter housing.It is the electrical part the hose is connected to.
 

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Volvo Code Retrieval
Accessing Trouble Codes
89-93 models (and later non-turbo/non-OBDII models)

Fuel Codes
Locate the diagnostic unit behind left strut tower and remove its cover.(see image) Connect selector cable to socket #2,which tests the fuel codes. Turn the ignition switch to the ON position(engine not running). Enter the diagnostic mode by pressing the push button on the diagnostic unit for at least 1 second, but not more than 3 seconds. The red LED light will start to flash,count the number of flashes in 3 flash intervals. The flashes will be seperated by 3 second intervals.Make note of all codes. If no codes are stored,the LED will flash 1-1-1,which means the fuel system is operating correctly.

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Ignition Codes
To access the ignition codes,follow the above procedure,but with the selector cable connected to the #6 socket on the diagnostic unit.
NOTE:Turbocharged models may have seperate codes for the turbo system and are accessse by hooking the selector cable to the #5 socket.

94 and later models with OBDII

The 850 turbo and 960 models are OBD II system which are only accessible with a scanner.

Clearing Trouble Codes
Once all faults have been corrected,turn the ignition switch to the ON position(engine not running).Recheck the codes,then depress the button for 5 seconds and release.After 3 seconds, the LED should light up.While the LED is lit,depress the button again for 5 seconds,when the button is released,the LED should go out.

Diagnostic Codes
Volvo
89-93 models
1-1-1 No faults.
1-1-2 ECU.
1-1-3 Fuel injectors.
1-1-3 Heated Oxygen sensor-max enrichment sensed (94-up).
1-1-5 Injector #1.
1-2-1 Mass airflow sensor.
1-2-2 Air temp sensor signal.
1-2-3 Coolant temp sensor signal.
1-2-5 Injector #2.
1-3-1 Ignition system RPM signal.
1-3-2 Battery voltage.
1-3-3 Throttle switch signal (idle).
1-3-5 Injector #3.
1-4-2 ECU faulty.
1-4-3 Knock Sensor signal missing or defective.
1-4-4 Fuel system load signal(missing or defective).
1-4-5 Injector #4.
1-5-3 Rear heated oxygen sensor signal.
1-5-4 EGR system-leakage or excessive flow.
1-5-5 Injector #5.
2-1-2 Oxygen sensor signal(front sensor on 94 and later models).
2-1-3 Throttle switch signal.
2-1-4 Ignition RPM signal erratic.
2-2-1 Heated Oxygen Sensor(Rich mixture/part throttle).
2-2-2 Main relay.
2-2-3 Idle valve signal.
2-2-4 Coolant temp sensor signal.
2-2-5 A/C pressure sensor signal.
2-3-1 Lambdfa adjustment.
2-3-1 Heated Oxygen sesnor(lean mixture/part throttle) 94-up.
2-3-2 Lamda adjustment.
2-3-2 Adaptive heated O2 sensor control (94-up).
2-3-3 Idle valve-closing signal.
2-3-4 Throttle switch signal missing.
2-4-1 EGR malfunction.
2-4-5 Idle air control valve-closing signal.
3-1-1 Speedometer signal.
3-1-4 Camshaft position signal missing or defective.
3-1-5 EVAP emission control system.
3-2-1 Cold start valve-signal missing.
3-2-2 Airflow meter hot wire.
3-2-4 Camshaft position siganl erratic.
3-2-5 ECU memory failure.
3-3-5 TCM request for MIL.
4-1-1 Throttle switch signal faulty or missing.
4-1-3 EGR temp sensor signal incorrect or missing.
4-1-4 Turbo boost regulation.
4-1-6 Turbo boost reduction from TCM.
4-2-5 Temp warning level #1.
4-3-1 EGR temp sensor faulty or missing.
4-3-2 High temp warning inside ECU.
4-3-3 No rear knock sensor signal.
4-3-5 Front heated oxygen sensor - slow response.
4-3-6 Rear heated oxygen sensor compensation.
4-4-3 Catalytic converter efficiency.
4-4-4 Acceleration sensor signal.
4-5-1 Misfire - #1 cylinder.
4-5-2 Misfire - #2 cylinder.
4-5-3 Misfire - #3 cylinder.
4-5-4 Misfire - #4 cylinder.
4-5-5 Misfire - #5 cylinder.
5-1-1 Adaptive oxygen sensor control-lean mixture at idle.
5-1-2 Oxygen integrator at max lean running limit.
5-1-3 High temp warning inside ECU.
5-1-4 Engine cooling fan-low speed signal faulty.
5-2-1 Oxygen sensor preheating-front.
5-2-2 Oxygen sensor preheating- rear.
5-3-1 Power stage-group A.
5-3-2 Power stage-group B.
5-3-3 Power stage- group C.
5-3-4 Power stage- group C.
5-3-5 TC control valve signal.
5-4-1 EVAP valve signal.
5-4-2 Misfire - more than one cylinder.
5-4-3 Misfire - at least one cylinder.
5-4-4 Misfire - more than one cylinder/catalytic converter damage.
5-4-5 Misfire - at least one cylinder/catalytic converter damage.
5-5-1 Misfire - #1 cylinder/catalytic converter damage.
5-5-2 Misfire - #2 cylinder/catalytic converter damage.
5-5-3 Misfire - #3 cylinder/catalytic converter damage.
5-5-4 Misfire - #4 cylinder/catalytic converter damage.
5-5-5 Misfire - #5 cylinder/catalytic converter damage.
 

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Discussion Starter · #14 ·
thanks for the info on sensor,i will try that,
im a bit lost on codes,so whats A7 used for then as thats the only one that didnt have 1-1-1
 

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Discussion Starter · #16 ·
thanks for that

i have another question now,

do you know if the 1993 volvo 850 se has a master fuse or something,

i went to start car this morning and theres nothing at all,even with a battery booster connected theres nothing,
 

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Do any of the dash lights work?Do you hear a click when you try to start?The starter may have gone bad on you now.
 

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Start at the battery and check all connections make sure they are clean and tight.That may me your main problem bad connections.Check the red wire to the starter and to the alternator also.Check those and let me know.
 

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Discussion Starter · #20 ·
ok boss im back again,i have power again now,that was the battery,
but it still doesnt want to start,i checked codes again and all were clear till i got to A3 socket the codes i got for that one were 1-4-4 and 4-4-4
does that mean anything to you?
 
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