erratic idle
#1
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Location: irving texas
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erratic idle
hey guys something i have noticed for a while now but havent really thought much of it till today. when ill be pulling out of a drive way or driving real slow and coming to a stop my truck idles down to the lower 400 rpm range then goes back up to 600ish rpm. cant think of anything that would cause this. it does it no matter if the engine is cold or hot. i replaced spark plugs, wires, and fuel filter about 20k miles ago and im always changing my oil every 3k miles. the only things done to the truck where the cai and two magnaflows and i replaced my old 105 amp alternator to a 145 amp one. and alternator is charging fine and maintains proper voltage (14.05 volts at idle no loads and similiar with brights on and blower at high.) if you need more info let me know!
#2
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Dirty IAC or EGR or MAF
EGR is doubtful though typically they just hang up and the 3 I inspected this week appeared to be functioning properly to me.
TPS can be out of wack if you fooled with it but generally those are fine as well,as long as you didn't fool with it.
Also did you make adjustments since installing the CAI that could defiantly be an issue as well.
EGR is doubtful though typically they just hang up and the 3 I inspected this week appeared to be functioning properly to me.
TPS can be out of wack if you fooled with it but generally those are fine as well,as long as you didn't fool with it.
Also did you make adjustments since installing the CAI that could defiantly be an issue as well.
#6
This cleared up mine which is also an 03. At first it may be worse when you start it up after resetting the pcm but let it relearn the crank position and you'll be good. Also make sure your battery is good/clean/sized correctly.
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#8
You're right you do need a scan tool I forgot. And now that i recall I only had to do it because my ignition was on when my battery drained so in this case you wouldn't have to.
#10
Launching!
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Dirty IAC or EGR or MAF
EGR is doubtful though typically they just hang up and the 3 I inspected this week appeared to be functioning properly to me.
TPS can be out of wack if you fooled with it but generally those are fine as well,as long as you didn't fool with it.
Also did you make adjustments since installing the CAI that could defiantly be an issue as well.
EGR is doubtful though typically they just hang up and the 3 I inspected this week appeared to be functioning properly to me.
TPS can be out of wack if you fooled with it but generally those are fine as well,as long as you didn't fool with it.
Also did you make adjustments since installing the CAI that could defiantly be an issue as well.