I've been having an issue with my '95 Cobra that started a few weeks ago. After driving in a heavy downpour with partially-flooded streets (may be irrelevant, but figured it's worth mentioning), the car started to experience a surge in idle to about 2400-2500 RPM with a flashing CEL almost immediately (withing about ten seconds) after a cold start. It's not a hunting or "surging" idle. The idle will go up to the mentioned RPM and will remain very steady while the CEL flashes. It will return to normal idle and the CEL will stop flashing after a minute or two. So far I have not experienced this after a warm/hot start. It's behaving almost as if the computer is entering a KOER test mode.
Aside from this, it's also been experiencing a miss/hesitation/low power while driving. This will occur in any gear at any speed between part and full throttle and is seemingly random. When it happens, the car will buck and the engine seems unable to rev higher than 3000 RPM.
The problem seems very similar to the one that joetrainer31 posted about a few years ago here, with the exception that I have no TPS or IAC codes. I also ran an SCT chip for a while, but I removed it about two years ago.
I pulled codes with the following results:
KOEO: 327 (EGR feedback signal low), 552 (AIR solenoid/circuit failure), 553 (AIR solenoid/circuit failure), and 558 (EGR vacuum regulator solenoid/circuit failure).
KOER: 311 (Thermactor system inoperative, right O2 sensor), 314 (Thermactor system inoperative, left O2 sensor), and 327 (EGR feedback signal low).
The EGR and smog systems were removed from my car about ten years ago. I have considered reinstalling the EGR, but haven't gotten around to it. I'll have to purchase new components or junkyard parts since my originals are long gone.
I haven't yet checked TPS voltage. I need to buy a multimeter first.
Aside from this, it's also been experiencing a miss/hesitation/low power while driving. This will occur in any gear at any speed between part and full throttle and is seemingly random. When it happens, the car will buck and the engine seems unable to rev higher than 3000 RPM.
The problem seems very similar to the one that joetrainer31 posted about a few years ago here, with the exception that I have no TPS or IAC codes. I also ran an SCT chip for a while, but I removed it about two years ago.
I pulled codes with the following results:
KOEO: 327 (EGR feedback signal low), 552 (AIR solenoid/circuit failure), 553 (AIR solenoid/circuit failure), and 558 (EGR vacuum regulator solenoid/circuit failure).
KOER: 311 (Thermactor system inoperative, right O2 sensor), 314 (Thermactor system inoperative, left O2 sensor), and 327 (EGR feedback signal low).
The EGR and smog systems were removed from my car about ten years ago. I have considered reinstalling the EGR, but haven't gotten around to it. I'll have to purchase new components or junkyard parts since my originals are long gone.
I haven't yet checked TPS voltage. I need to buy a multimeter first.