car cranking but not starting
#1
10-19-2012, 04:39 PM
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car cranking but not starting
1996 volvo 850 turbo.i have tried everything i can think of. The horn works so i know its not the battery. ive replaced the cap, rotor, and the ignition control modual. also i check to see if the fuel pump was priming up and it did.ive tried cleaning the cam sensor to see if that was the problem. and lastly i noticed that there was no spark at all anywhere. I am definitely stumped on this on. help pleeease :P
Last edited by lemon drop; 10-19-2012 at 05:23 PM.
#3
10-20-2012, 12:10 AM
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#5
10-20-2012, 02:11 PM
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The ignition system needs a minimum of around 10.6 volts to work properly. That isn't the exact number for a Volvo but it's an average to look for when the engine is cranking. With the starter engaged you need to have at least 10.6 volts available for the ignition system and ECU to function properly.
When you say you replaced the ignition control module did you do it as the stock coil & module assembly thereby getting a new coil also ??
The horn will operate at a voltage way below 10.6 so the horn working doesn't tell anyone anything other than the battery isn't totally dead. You need to test the voltage with the starter turning the engine over.
If you tested for spark at the coil and found none then doing the cap and rotor wouldn't have done any good as they are downstream of the coil. If the coil isn't producing a spark the cap, rotor and wires wouldn't affect spark production.
When you say you replaced the ignition control module did you do it as the stock coil & module assembly thereby getting a new coil also ??
The horn will operate at a voltage way below 10.6 so the horn working doesn't tell anyone anything other than the battery isn't totally dead. You need to test the voltage with the starter turning the engine over.
If you tested for spark at the coil and found none then doing the cap and rotor wouldn't have done any good as they are downstream of the coil. If the coil isn't producing a spark the cap, rotor and wires wouldn't affect spark production.
#7
10-21-2012, 01:02 AM
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I have to be careful about working off memory. The standard is 9.6 while cranking and yes it can drop lower and still keep running. I tried to find a figure for shut off for an electronic ignition but couldn't.
As for a no start issue I would stick with the 9.6 volts or more. If you don't read that then you have an issue to repair before going further.
As for a no start issue I would stick with the 9.6 volts or more. If you don't read that then you have an issue to repair before going further.
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