Handey87
New member
- Joined
- May 1, 2009
- Location
- Raleigh, NC
I've been having some problems lately, have made a few threads, and basically my car just keeps running worse and worse, richer and richer, and I'm going crazy trying to find the fault. I've got mild mods, nothing crazy, stock LH2.4, 15g, browntops, ipd cam, it's been reasonably maintained, new plugs, wires, dizzy in the past year so ignition should be fine. AEM wideband is how I'm reading the AFRs.
So here's what's up: About a month ago, I noticed my afrs during cruise would stay around 14.3 or so, then kick back over to closed loop, weirder **** started happening, like it seemed like it was in closed loop but it would swing between 14.3 and 14.8 AFR, on the rich side of things. Then my AMM died, and the car just would not run. Swapped that and the FPR out, and it was running okay. Over time sometimes I'd cruise and it would be spot on, then I'd get afr's of like 14.2 steady.
Yesterday I used electrical contact cleaner on a few plugs the tps, amm, and knock sensor, and it ran perfect all the way home, a 65 mile trip. This morning it started running in open loop during cruise on the highway, so before lunch I checked and cleaned a few more connections, o2 sensor, ECT, and looked for vacuum leaks. Found a leaky injector seal, and swapped all the injectors. In a frantic attempt to remedy this over the last month I've done the following:
Replaced/swapped out:
Injectors for stock and back again
3 AMMs
560 ecu to a 96x ecu and back
new knock sensor
new ECT
new bosch O2 sensor
new FPR
done:
checked every connector I could find under the hood, pulled them apart and cleaned them.
What it's doing after lunchtime today: It'll start cold just fine, but after a few minutes, the AFRs will start dropping steadily, eventually reaching 10.0 just as I was getting home. It was running pretty bad by then. Once the engine is up to temp, it'll kind of get into closed loop for maybe half a minute, then the afr's start steadily dropping again until the engine runs worse and worse. This is when I swapped the injectors, amm, ecu. No change.
Long post I know, but I can't figure out what the hell is wrong with this car, I'm really hoping someone has had the same issue and could help.
So here's what's up: About a month ago, I noticed my afrs during cruise would stay around 14.3 or so, then kick back over to closed loop, weirder **** started happening, like it seemed like it was in closed loop but it would swing between 14.3 and 14.8 AFR, on the rich side of things. Then my AMM died, and the car just would not run. Swapped that and the FPR out, and it was running okay. Over time sometimes I'd cruise and it would be spot on, then I'd get afr's of like 14.2 steady.
Yesterday I used electrical contact cleaner on a few plugs the tps, amm, and knock sensor, and it ran perfect all the way home, a 65 mile trip. This morning it started running in open loop during cruise on the highway, so before lunch I checked and cleaned a few more connections, o2 sensor, ECT, and looked for vacuum leaks. Found a leaky injector seal, and swapped all the injectors. In a frantic attempt to remedy this over the last month I've done the following:
Replaced/swapped out:
Injectors for stock and back again
3 AMMs
560 ecu to a 96x ecu and back
new knock sensor
new ECT
new bosch O2 sensor
new FPR
done:
checked every connector I could find under the hood, pulled them apart and cleaned them.
What it's doing after lunchtime today: It'll start cold just fine, but after a few minutes, the AFRs will start dropping steadily, eventually reaching 10.0 just as I was getting home. It was running pretty bad by then. Once the engine is up to temp, it'll kind of get into closed loop for maybe half a minute, then the afr's start steadily dropping again until the engine runs worse and worse. This is when I swapped the injectors, amm, ecu. No change.
Long post I know, but I can't figure out what the hell is wrong with this car, I'm really hoping someone has had the same issue and could help.
