89 buring rich, PLEASE HELP!
Thread Starter
Joined: May 2012
Posts: 13
From: Michigan
89 buring rich, PLEASE HELP!
I have an 89 mustang im kinda new to the auto mechanic scene and im getting into all this stuff. It runs rich and lacks performance. I recently found out that the smog pump was removed before i got it along with the cats. Would either of those parts cause it to run rich? if not where is a good cheap place to start? Thanks!
6th Gear Member
Joined: Nov 2006
Posts: 9,239
From: Spfld, MA
Joined: Apr 2012
Posts: 19
From: Ohio
scan it for codes. you will probably see a 21 or ect code this can be caused by 2 different things, a bad sensor or a thermostat that is not in spec. the thermostat is what i have typically found in my years as a ford field engineer. either it is stuck open or the a low temp stat. if you do not have a upgraded ecm/eec computer then put in the stock thermostat and give it a try.PS this will also increase fuel mileage.
Thread Starter
Joined: May 2012
Posts: 13
From: Michigan
scan it for codes. you will probably see a 21 or ect code this can be caused by 2 different things, a bad sensor or a thermostat that is not in spec. the thermostat is what i have typically found in my years as a ford field engineer. either it is stuck open or the a low temp stat. if you do not have a upgraded ecm/eec computer then put in the stock thermostat and give it a try.PS this will also increase fuel mileage.
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