disconnect battery

fast97gt

Active Member

Jan 2, 2007

1,082

2

49

north carolina

Jan 26, 2010

#1

• Jan 26, 2010

• #1

well i ran my car out of gas due to a falty gas gauge in the cluster, ive fixed it now. but the thing is it threw a code, typical run lean code as it should, so i disconnected battery to fix the guage. then i connected the battery, get this the car runs better whats up with that, i dont know, but the car is more responsive, idles better, and allout performes better. why?

 

Sonic04GT

Member

Nov 1, 2009

844

2

19

West Palm Beach, FL

Jan 26, 2010

#2

• Jan 26, 2010

• #2

fast97gt said:

well i ran my car out of gas due to a falty gas gauge in the cluster, ive fixed it now. but the thing is it threw a code, typical run lean code as it should, so i disconnected battery to fix the guage. then i connected the battery, get this the car runs better whats up with that, i dont know, but the car is more responsive, idles better, and allout performes better. why?

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I'm a complete noob but I'm guessing because it reset the PCM and the car is re-learning everything? Wouldn't things be a little sloppier at first though if that were the case?

 

fast97gt

Active Member

Jan 2, 2007

1,082

2

49

north carolina

Jan 27, 2010

#3

• Jan 27, 2010

• #3

That's what I thought to, but I've noticed that the car ran poorly before all this, now my iac is working properly, its like it was stuck in open loop before I did everything.

 

fast97gt

Active Member

Jan 2, 2007

1,082

2

49

north carolina

Jan 27, 2010

#4

• Jan 27, 2010

• #4

That's what I thought to, but I've noticed that the car ran poorly before all this, now my iac is working properly, etc. its like it was stuck in open loop before I did everything.

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

4,749

95

134

Jan 27, 2010

#5

• Jan 27, 2010

• #5

Personally I think it is good to reset the PCM at least 1-2 times a year and always after doing any changes to air, spark, or fuel systems.