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Old Jun 1, 2020 | 11:08 PM
  #1  
Mcruze1's Avatar
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Help please!!

86 iroc with tpi...

So I've finally got my car to start...again and I'm having an issue with a rich start condition I have a gm tech1 and the data stream looks pretty good but heres the kicker if I unplug the maf it starts fine and seems to idle cleaner with no change to the data stream. Has anyone seen this or have any ideas to check?
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Old Jun 2, 2020 | 04:09 AM
  #2  
alan91z28's Avatar
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From: PA
Car: 91/89/85/82 Z28s, 88 TA, 88/88 SC
Engine: SBC and LS variations
Re: Help please!!

with your MAF plugged in what is the airflow reading on your tech1? if incorrect this could certainly be an issue and need to deduce is it a sensor issue or truly high airflow at idle due to vacuum leak, throttle set wrong, etc

is your TPS signal reading correctly and throttle set correctly



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