SeilerBird
Well-known member
Thanks Bill. I just started the engine and let it warm up. Depressing the brake pedal doesn''t change the idle speed at all.
I hate it when these techs start "Part replacing" without actually knowing what the issue is. That computer is EXPENSIVE and is the least likely item to go wrong. I hate to say this, but I would go to a Chevy dealership. Those guys are trained to work on that specific issue. They have the test equipment to check each sensor. If they replace the ECM and it doesn't fix the problem, they won't charge you for it. If an independent replaces the ECM..... he has no way to return it (after installing it) and you may be stuck paying for something that didn't fix the problem.SeilerBird said:Worrying about the trans fluid and brake fluid at this point is not necessary. I tried driving it today and it is really acting up. At one point the engine quit and it was hard to start. I managed to get it back to the shop. It still isn't showing any codes. However the computer thinks the brake lights are on when they are off and visa versa. He checked the ground and it appears ok. Right now he is checking on the cost of a new computer. He thinks it is either a computer problem or a wiring problem.
If the mechanic has no codes or other indicators, he is "part replacing". Sometimes that's what it takes. However, a $300 +/- computer is a pricey guess. Personally, I'd risk $50 or so and have him change the oxygen sensor before I sprang for a computer. Oxygen sensors wear out normally, computers do not and the sensors do not always throw a code when bad. At least you would have a new fresh sensor you shouldn't have to worry about any time soon.SeilerBird said:The mechanic is not "part replacing". He asked me what I wanted to do and I am having him check on the price of a new computer.
Starting with replacing a bad switch sounds a lot more sensible than starting with the ECM...... As Molaker stated, you can replace a lot of sensors for the price of an ECM and those sensors do go bad.SeilerBird said:The mechanic has been in contact with someone who works for AC Delco and the guy helped him troubleshoot. He just found a bad switch on the brake pedal and he has one ordered. It will be here tomorrow so I am spending the night at the shop. The problem with going to a GM dealer is the fact I have three cats in here and I live in here. I can't just drop it off and pick it up a few days later. I have to stay with the vehicle. This guy allows me to do that. No GM dealer would ever allow that.
You missed my point. The mechanic is not part replacing, I am the one doing it by telling him to do it. But right now the computer is not suspect, the brake switch is.Molaker said:If the mechanic has no codes or other indicators, he is "part replacing". Sometimes that's what it takes.
The engine only quit and hard started once. It is a very confusing issue to be sure.Wavery said:My guess is that you may have 2 (coincidental) issues going on at once. That's a lot more common than you may think. The stop light/crz control switch may be causing the indicator issue but I doubt that it is causing the engine to quit running and hard start issue.
That sure sounds like the speed sensor to me... That could explain a lot of symptoms........ I'm not sure on that vehicle but on most GM vehicles the speed sensor reports to the ECM and influences shift patterns, timing and other functions.SeilerBird said:The only time the speedometer goes haywire is the exact time the light comes on.