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Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue
Are you parking the truck on a hill, with the front end down hill?
The fuel return line to the tank, in the sending unit, should not be so long that it is down in the gas.
Did you over fill the gas tank?
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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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