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Re: fuel injectors
The ECM will increase fuel based on inputs from the MAP, 02 and TPS.
If the MAP is bad (will not hold a vacuum or returns wrong value), the ECM could send too much fuel. I also had an issue recently where the vacuum hose to the MAP would not hold a vacuum causing problems.
A bad O2 can cause the ECM to think the engine is running lean and give it more fuel.
If you have access to a scan tool, it would be a good idea to see what the MAP, O2 and TPS are doing.
//2000CAYukon
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