Hey guys,
I've been chasing a very slight idle issue that only happens when I'm in neutral/out of gear (5spd car)
It's only about a 50-100 rpm change, but enough to tell something's up and shake me inside the car
Here's what I've done so far;
Replaced all 8 plugs
Replaced fuel filter
Replaced TPS
Replaced alternator (battery tested ok)
Replaced MAF
Checked PCV (it does rattle, and has suction, I also get suction through the oil filler with the cap off)
Unplugged IAC and car does die, have also cleaned it (there's a new one sitting at Advance for me otherwise)
Checked for vacuum leaks with MAF cleaner spray
Here's also some datalogging values;
IACDC@idle .56 @1500 .61
LFT1 @idle .97 @1500 1.00
LFT2 @idle .96 @1500 1.00
MAFV @idle 185 @1500 230
^CTS @idle 470 @1500 No Change
TPV @idle 184 @1500 199
I wouldn't think it's a C.O.P. or injector thing because I feel like that would be more obvious and not just at idle, I also have been told if it was an O2 thing my LFT values would be out of whack.
Any help is appreciated, I know IAC is the big one on these cars, but just because I've cleaned it and it kills the car when unplugged I assumed it was doing fine...
Thanks in advance!
Rob
I've been chasing a very slight idle issue that only happens when I'm in neutral/out of gear (5spd car)
It's only about a 50-100 rpm change, but enough to tell something's up and shake me inside the car
Here's what I've done so far;
Replaced all 8 plugs
Replaced fuel filter
Replaced TPS
Replaced alternator (battery tested ok)
Replaced MAF
Checked PCV (it does rattle, and has suction, I also get suction through the oil filler with the cap off)
Unplugged IAC and car does die, have also cleaned it (there's a new one sitting at Advance for me otherwise)
Checked for vacuum leaks with MAF cleaner spray
Here's also some datalogging values;
IACDC@idle .56 @1500 .61
LFT1 @idle .97 @1500 1.00
LFT2 @idle .96 @1500 1.00
MAFV @idle 185 @1500 230
^CTS @idle 470 @1500 No Change
TPV @idle 184 @1500 199
I wouldn't think it's a C.O.P. or injector thing because I feel like that would be more obvious and not just at idle, I also have been told if it was an O2 thing my LFT values would be out of whack.
Any help is appreciated, I know IAC is the big one on these cars, but just because I've cleaned it and it kills the car when unplugged I assumed it was doing fine...
Thanks in advance!
Rob