ls1 rough idle and hesitation, running rich
#1
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ls1 rough idle and hesitation, running rich
My '99 ls1 m6 has had a rough idle, hesitation, been back firing and running really rich for the past few weeks since I installed an slp catback. I've changed plugs and wires, O2, tps, and maf sensors. Had it scanned today and the scanner read the maf was faulty, but that's all it showed and it was a cheap scanner. Gonna get another new maf and see if that cures it. Any other ideas of what it could be?
Mods : Lid, pacesetter lt's, 3" ory, slp loudmouth 2
Mods : Lid, pacesetter lt's, 3" ory, slp loudmouth 2
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Cleaned the iac and throttle body yesterday, still no luck. All vacuum lines look good from what I can see though. Anyone know where I can get a vacuum line kit, or some sizes at least? SES is on, but the MAF was the only thing the scanner showed, and it was replaced.
Last edited by bluegoose177; 09-23-2013 at 07:19 PM. Reason: More info
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#8
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Cleaned the iac and throttle body yesterday, still no luck. All vacuum lines look good from what I can see though. Anyone know where I can get a vacuum line kit, or some sizes at least? SES is on, but the MAF was the only thing the scanner showed, and it was replaced.
Also, double check you have all plug wires snapped down on the plugs and coils.
#9
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My '99 ls1 m6 has had a rough idle, hesitation, been back firing and running really rich for the past few weeks since I installed an slp catback. I've changed plugs and wires, O2, tps, and maf sensors. Had it scanned today and the scanner read the maf was faulty, but that's all it showed and it was a cheap scanner. Gonna get another new maf and see if that cures it. Any other ideas of what it could be?
Mods : Lid, pacesetter lt's, 3" ory, slp loudmouth 2
Mods : Lid, pacesetter lt's, 3" ory, slp loudmouth 2
They cause all your issues when they are failing.
.
#10
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Everything looks good on the scanner though, exhaust back pressure shouldn't have anything to do with it, should it? Or could it just need tuned?
Last edited by bluegoose177; 09-24-2013 at 07:23 PM.
#11
I can't see why in the world it would be your exhaust back pressure! I'd keep looking for a different solution. Spray a can of carb cleaner over all vacuum lines and there connections to check for a leak, you'll hear the car will want to choke out.
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Sprayed carb cleaner around vacuum lines, injectors, and intake, didn't do anything. Which fuse is for the maf sensor? And is there only one coolant temp sensor or two?
#15