jerking during decel
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Joined: Feb 2009
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From: walnut illinois
jerking during decel
i have 2002 vert about 2weeks ago i put varam cold air intake on ever since then on accoassion i get jerking on decel can be at 40mph or all the way upto 80mph someone told me i needed to go thru process of relearning computer idle so i have done that 2 times still the same anyone else run into this any help much appreciated thanks
Le Mans Master
Joined: Aug 2005
Posts: 5,375
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From: CA.
St. Jude Donor '13-'14-'15
Quite often with a vararam you will get these issues--Are you getting any codes ?--Good news is that it is an easy fix--bad news you'll need a full tuner like HP or EFILIVE---a handheld won't do it--More than likely your fuel trims are way off- Those will have to be corrected----You may need to adjust your "desired airflow" table for In Gear--Adding a % will fix stalling and surging--A fix for a more modded car is to disable or turn off the "DFCO " system----(deceleration fuel cut-off) the jerking you may feel is the fuel cutting on/off-a vararam will alter the MAP #'s and these readings affect the DFCO--
If you have a handheld programmer or a friend does--check your fuel trims while driving and even though your check engine lite may NOT be on--you still may have codes in there--They are called "pending codes" and they could help point you in the right direction---
If you have a handheld programmer or a friend does--check your fuel trims while driving and even though your check engine lite may NOT be on--you still may have codes in there--They are called "pending codes" and they could help point you in the right direction---
