opti or ICM?
Thread Starter
Joined: Nov 2005
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From: Central Texas
opti or ICM? 93 TA w 107k mi. The car starts and idles but once it reaches operating temp, starts hesitating and stumbling.
Is this signs of optispark failing?
Fwiw, I was going to replace the plugs and wires this weekend anyway
Tia
Is this signs of optispark failing?
Fwiw, I was going to replace the plugs and wires this weekend anyway
Tia
SES light on? Could also be the coolant temp sensor in the waterpump. Once it goes into closed loop when it is warmed up it will have issues if it is bad. Just troubleshot one with this issue less than a month ago.
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Thread Starter
Joined: Nov 2005
Posts: 1,933
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From: Central Texas
fwiw, the car starts and idles fine... once it reaches 160deg, it starts to hesitate every rpm above about 1200. I can also smell raw fuel
The problem with bench-testing an ICM is that testing it at room temperature won't give any indication of how it works when it's hot. I ran into this problem several years ago...it tested fine but still failed when I put it back in. A replacement later and all is well.
Rock Auto lists options from $44-90.
It should be to the right of your right leg when you sit in the car, if DLC terminal is where you hook the scanner up to. It is to the left of the center console.
It should be to the right of your right leg when you sit in the car, if DLC terminal is where you hook the scanner up to. It is to the left of the center console.
Thread Starter
Joined: Nov 2005
Posts: 1,933
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From: Central Texas
that is so cool... its own code scanner
here's what it showed
28 Transmission Range (TR) pressure switch assembly fault
32 Exhaust Gas Recirculation (EGR)
61 A/C system performance
does any of that help?
here's what it showed
28 Transmission Range (TR) pressure switch assembly fault
32 Exhaust Gas Recirculation (EGR)
61 A/C system performance
does any of that help?
Thread Starter
Joined: Nov 2005
Posts: 1,933
Likes: 4
From: Central Texas
since I know the reason for all the codes thrown, I'm just going to space out the ICM/coil and try that for the afternoon... still continues, I'll start with a new ICM and replace the wires this weekend (I already have 'em)
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Autozone tests the ICM, have them do it a bunch of times in a row, that way the internals warm up, they seem to fail when its hot. Also when the motor gets hot, it wouldn't be a bad idea to check and see if you have strong spark or a weak spark, blue spark is a strong spark and yellow is a weak spark, that would help you determine if it is in fact ignition related when its hot, and not some other problem.
Btw, do you have a cat converter?
Btw, do you have a cat converter?
Thread Starter
Joined: Nov 2005
Posts: 1,933
Likes: 4
From: Central Texas
Autozone tests the ICM, have them do it a bunch of times in a row, that way the internals warm up, they seem to fail when its hot. Also when the motor gets hot, it wouldn't be a bad idea to check and see if you have strong spark or a weak spark, blue spark is a strong spark and yellow is a weak spark, that would help you determine if it is in fact ignition related when its hot, and not some other problem.
Btw, do you have a cat converter?
Btw, do you have a cat converter?
put in spacers and as soon as it hit 160deg, it started hesitating again...
my buddy manages an O'Reilly... I'll get him to test it this afternoon