Question about 2005 Buick LaCrosse
SOURCE: will not start after changing
If the engine is cranking, it can only be 2 things left, got gas? Are you getting a spark at the plug wire? Check the oil. Some cars won't turn on the fuel pump with no oil, could be the pump. Could be the coils. You have to check these things out and find out which way to go next.
Posted on Dec 10, 2008
I realize you may have already solved this but, this happened to me also in July...
I had to have it towed... a jump wouldn't work (battery was fine).
It was the...
ECM: Electronic Control Module
ECU: Electronic Control Unit
From repairpal.com: The vehicle's engine control unit (ECU) is a computer that receives information from sensors in the engine. The computer processes this information and makes calculations to control ignition timing, fuel-delivery parameters, engine idle speed, and pollution emitted from the vehicle. The control unit interacts and makes mutual decisions with systems throughout the vehicle. On newer vehicles, the ECU may also control the engine cooling fans, cruise control, and AC Compressor.
They told me they hooked it up to another one to confirm that's what it was. I think they said the fuel pump was working, but the signals weren't getting through (?). I'm guessing they only had to connect one of those diagnostic OBD things to it.
Anyway, they showed it to me, it was a small motherboard about 4x6 inches in a small black holder. He said the part alone cost about $400, but I've not been able to confirm this on the web to see how badly I got ripped off. When your car is sitting dead as a bug in someone's repair shop, and you are helpless as to how to fix it, unless you can afford to have it towed to multiple places, well, you gotta go with what they tell ya. Every place I check on the web for this make/model of ECM says "call for price".
Perhaps I got ripped off for $400 for the part, but I wouldn't know how to put it in regardless.
Anyway, that's why the car was dead as a doornail despite the battery and other things being fine. No information was getting through because the control module was dead.
I'm not saying this is/was your problem, but it may have been.
Posted on Aug 30, 2009
I would start looking at the little things first, like fuses and relays. If their ok, then I would check to see if the fuel pump is kicking on. It ususaly will make a humming sound, for a second or two, then it cuts off.
Posted on Jan 11, 2011
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