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Old 07-08-2007, 01:12 AM
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Default Weak Spark

I can't start my car. I pulled the plugs and cranked it to check for spark, and I noticed that its there, but really weak. Where should I start my troubledshooting?
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Old 07-08-2007, 01:21 AM
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Talking Re: Weak Spark

i would check resistance on the coils per procedure and then i would look at all my grounds and power points! but youre at the right place this cats here are sharp iam sure they whill have some good anvice!!!!
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Old 07-08-2007, 10:43 AM
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Lightbulb Re: Weak Spark

http://www.gnttype.org/techarea/main...e/nostart.html
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Old 07-21-2007, 10:36 PM
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Default Re: Weak Spark

What does the coolant temp sensor do? Can it cause a no start condition if its bad? I'm also flooding the cylinders everytime I try to start it. Hince the no start.
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Old 07-21-2007, 11:12 PM
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Default Re: Weak Spark

Definitely can cause a no start , You need a scan tool in order to read the
coolant temp the sensor is telling the ecm . for example ,if it's 70 degrees
outside and your engine is cold, and you plug in the scan tool and read the temp
and it says like 32 degrees . Then your temp sensor is inaccurate. The ecm in your car would interpret that as very cold , and it would richen the fuel mixture , thus flooding out your car and of coure a NO START
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Old 07-22-2007, 12:48 AM
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Default Re: Weak Spark

Thanks.
I installed a scan master a while ago but never got the car running.(head gasket) I don't know how to use the thing except for checking battery voltage. What does the coolant temp page look like?
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Old 08-04-2007, 06:16 PM
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Default Re: Weak Spark

OK, I replaced the coolant sensor. No more flooding and the spark is strong.
But still no start. A few backfires though. The cam sensor is in straight. I have injector pulse. I think that the cam sensor is just bad.
Any thoughts?
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Old 08-04-2007, 09:28 PM
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Default Re: Weak Spark

If you have injector pulse, your cam sensor is sending a signal.

Make sure the cam sensor is set correctly ... also check fuel pressure...
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Old 08-04-2007, 11:14 PM
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Default Re: Weak Spark

I thought the same thing. But my cam sensor has been repaired with the RJC cam sensor repair kit. Is there anything can be wrong with it. I put the cam sensor in with the cylinder heads off, and I used the cam sensor tool from caspers. I'm pretty sure its in right. I think that the cam sensor was repaired wrong. But I want to be sure before I order a new one.
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Old 08-05-2007, 09:59 AM
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Default Re: Weak Spark

are the plugs still fuel fouled ??
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