What Makes A Car Run Rich At Idle?

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

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104

New Jersey

Feb 26, 2014

#1

• Feb 26, 2014

• #1

Im wondering what makes a car run rich at idle on a hot re-start..then goes back to normal...stays running rich for a minute or so and that when the surging is happening then it goes back to 14.7 from 11s...its weird I really don't remember it doing that...just lately almost the same time im having the surging issue on hot -restarts...

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

43,096

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Box behind Walmart

Feb 27, 2014

#2

• Feb 27, 2014

• #2

Is this on a carbureted 85?

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 27, 2014

#3

• Feb 27, 2014

• #3

No that was my old screen name when I had an 85..its the car in my sig the 87 GT turbo....

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

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a van down by the river

Feb 27, 2014

#4

• Feb 27, 2014

• #4

You did all the base idle resets correct? And how is yours tuned?

 

Grabbin' Asphalt

10 Year Member

Jun 10, 2013

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Atlanta, Ga

Feb 27, 2014

#5

• Feb 27, 2014

• #5

Any Codes?? ...but many of the sensors, O2's, worn ECT, dirty MAF, EGR valve and sensor to name a few. When I changed my ECT and went back to a 192* stat did wonders for my non-cats exhaust.

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 27, 2014

#6

• Feb 27, 2014

• #6

yes I did I also just replaced the TPS and IAC,Now I did talk to Frank at PSI...We discussed my car he said it sounds like a bad o2 sensor...I just ordered them now to waiting for them to try that next..if this doesn't work im taking it to him for a re-tune...

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 27, 2014

#7

• Feb 27, 2014

• #7

Grabbin' Asphalt said:

Any Codes?? ...but many of the sensors, O2's, worn ECT, dirty MAF, EGR valve and sensor to name a few. When I changed my ECT and went back to a 192* stat did wonders for my non-cats exhaust.

Click to expand...

ECT isn't that old...just ordered new o2s...no egr valve...didn't clean the MAF yet...I had codes I posted them in another post...

 

Grabbin' Asphalt

10 Year Member

Jun 10, 2013

2,029

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Atlanta, Ga

Feb 27, 2014

#8

• Feb 27, 2014

• #8

What t-stat also??

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 27, 2014

#9

• Feb 27, 2014

• #9

I think if I remember its a 190....