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Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue
If it has a bad injector you only have to take out the bad one, but you need to look at the aluminum casting very closely.
When you install injectors without lube on the o-rings it can crack the TBI housing.
Injectors are $4 each at the local U=Pull-It where I live.
If the problem comes and goes it is more likely an injector, then a crack, but look to see if you can see a crack before spending money on an injector.
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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