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2000 Volvo C70

Tiny
TERREONE
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  • 2000 VOLVO C70
Engine Mechanical problem
2000 Volvo C70 Front Wheel Drive Automatic 80k miles

After replacing the head gasket and flywheel my 2000 Volvo C70 Turbo cranks, tries to start but won't. There is spark. The timing is correct. I pulled off the fuel rail and the injectors fire two to four times each and then stop. If I turn the key back and do it again, it repeats. Injectors shoot out fuel a few times and as the car continues to crank, they cease to fire any more fuel. Any ideas?
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Friday, October 1st, 2010 AT 11:59 AM

11 Replies

Tiny
WRENCHTECH
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Is the spark doing the same thing as the injectors?
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Friday, October 1st, 2010 AT 12:09 PM
Tiny
TERREONE
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There is continous spark. Only the injectors squirt gas for 4 or 5 cycles (4 or 5 times each) and then they just stop squirting fuel. The is spark continous. I have replaced the crankshaft sensor.
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Saturday, October 2nd, 2010 AT 4:57 PM
Tiny
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I would try unplugging all the injectors and use a noid light in one of them to see if it changes anything to indicate an shorted injector causing the problem.
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Saturday, October 2nd, 2010 AT 5:00 PM
Tiny
TERREONE
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Even is all 5 injectors are firing at one point? All 5 take their respective turns for a few times each and then none work.
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Saturday, October 2nd, 2010 AT 5:23 PM
Tiny
WRENCHTECH
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But you don't know if one shorted injector is pulling the power supply down.
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Saturday, October 2nd, 2010 AT 5:26 PM
Tiny
TERREONE
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OK, I'll try it. At hti point I'll try anything. Since I don't have a 'noid' lite or know what it is, can I simply take turns disconnecting one injector at a time?
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Saturday, October 2nd, 2010 AT 5:29 PM
Tiny
WRENCHTECH
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No, you can buy a noid light at most any auto parts store for under $10.
How do you know that your losing injector pulse if you don't have a noid light?
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Saturday, October 2nd, 2010 AT 5:32 PM
Tiny
TERREONE
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By the way, each and everytime I turn the key back and try to restart I get all injectors firing again---and then stopping again.
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Saturday, October 2nd, 2010 AT 5:33 PM
Tiny
TERREONE
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I have pulled the entire rail our and allow them to fire into a container. I can see them squirting.
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Saturday, October 2nd, 2010 AT 5:36 PM
Tiny
WRENCHTECH
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OK, we need to look at this electrically.
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Saturday, October 2nd, 2010 AT 5:37 PM
Tiny
JIS001
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One possibility to the injectors quiting is that you could have an immobolizer issue. When there is a fault with the immobolizer the vehicle will usually strart for a second or two and then quit running since the injectors get disable. If you have another key then try using the other key. If it starts then you have a bad key. If you get the same thing then you know you have an issue. You should start by checking all your fuses. There is one for the anti theft module. It should be fuse #8 under the hood. Make sure there is power going trough using a test light and remove fuse for inspection. If you still have issues then I strongly suggest that you take in to a shop that is capable of diagnosing this type of problem or you may need to take it to the dealership.
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Sunday, October 3rd, 2010 AT 10:52 AM

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