Hi guys i need some help here getting out of ideas were to find a problem on my 2001 grand am, it has a 3.4 engine. When is cold, works great, but after 10 minutes of driving it begins to have misfires, the more you drive, more present is the problem, is difficult to start from a total stop, but it seems that if you go over 2000 RPMs the problem goes away and is back after 3500 RPMs.I have done this. 1. Replace spark plugs 2. Replace fuel press regulator 3. Serviced injector, all were dirty but they just needed some cleaning. Regards.
Answer: Sounds like it could be a crank sensor problem. They usually act up the warmer the engine gets and will cause a rough idle and hesitation. The same can be said about the ignition module, usually runs great cold, then as the engine heats up it starts to cause misfires when faulty. A bad coil can do the same thing, but from what you describe I would lean toward either of the first two. Most times they will set a trouble code, so if the check engine light is on, you would need to get the car scanned and see what code came up and that would help in diagnosis. Sometimes the wiring to the crank sensor gets chaffed and shorts out, causing the issue, so that should be checked too.
* UPDATE * I connected snap on scanner and got p0336 CKP 18/24 X out of range, checked and seems that the damper was replaced. Just an idea, if I unplug the 24X CKP and let the 7X ( behind the block) connected to the this, could be the 24X be shipped using the ignition module to start the car????Thanks.
Replacing the crank pulley should not have set any codes. As stated above, check the wires very closely for that sensor behind the pulley. I would bet they are partially broken or even rubbing on the pulley.
2000 Pontiac Grand Am SE. Engine Size : 4 cyl. Question: whats the usual cost for an ignition control module for a 2000 Pontiac grand am SE?
Answer: Answer: Depending if you get an aftermarket or factory part, you are looking anywhere from $100 to $200 for the module and usually about an hour of labor at what ever rate your shop charges. If possible, I would recommend getting a genuine GM ignition module for your car. Inferior electronics in aftermarket parts can fail rather quickly, and leave you stranded or having to purchase another one. When it comes to replacement parts, you definitely get what you pay for.
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