TBI 350 won't idle
05-06-2010, 03:04 PM
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TBI 350 won't idle
My TBI 350 seems to have developed a problem -- once it warms up, it won't idle. When the engine is cold it idles fine, then when it gets hot, the engine will die if I take my foot off the gas. I replaced my idle air control valve but that didn't help at all. It was running fine until about a month ago. Any suggestions what I might check?
Thanks!
Thanks!
05-10-2010, 12:04 PM
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Re: TBI 350 won't idle
Ok I did some testing this weekend - here's what I found:
- no error codes from the ecu
- I found the IAC bypass procedure on this board and tried it with the engine warm - idle was TERRIBLE. Wouldn't even run unless i put my foot on the gas.
- hooked up my ALDL cable and did some test runs. I'm running vortec heads and intake on the stock 350 bottom end but am still running the stock ECU program -- my BLM values are all over the place so I think it needs a custom tune...
Haven't messed with the MAT sensor - maybe it's bad?
- no error codes from the ecu
- I found the IAC bypass procedure on this board and tried it with the engine warm - idle was TERRIBLE. Wouldn't even run unless i put my foot on the gas.
- hooked up my ALDL cable and did some test runs. I'm running vortec heads and intake on the stock 350 bottom end but am still running the stock ECU program -- my BLM values are all over the place so I think it needs a custom tune...
Haven't messed with the MAT sensor - maybe it's bad?
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92camaroJoe
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