So For a couple of weeks now, my car has been stuck in limp mode. It has a very slow acceleration and the last time I drove it anywhere it stalled out. It really can't make it up my hill at anything more than 10-20 MPH. Every weekend I've been frantically fixing possible causes, because she's really my only ride without causing my family a bunch of trouble. First theory I had was that the TPS finally gave out, the last time I had pulled codes the sensor threw one at me. While I had the Throttle Body out I decided I would also clean that out with some throttle body cleaner since the inside of it was disgusting and black. In addition I changed the throttle bodies gaskets just so it wouldn't have any issues in the long run. Wen't for a test drive. Didn't fix the problem. Still stuck in limp mode.
When that didn't work, I crossed it off my list and started doing more research. I bought a code reader to make pulling them easy, and it gave me a code 998 (limp mode), and a 224 (Erratic Ignition Diagnostic Monitor "IDM" input to processor). I know this has to do with the coils but we did some more research and some people were claiming that they changed their spark plugs and it fixed very similar issues. So this last weekend I tried that. I changed the spark plugs and the ignition wires. Went for a test drive. Didn't fix the problem. Still stuck in limp mode, but this time I had a surprise when I got home. The exhaust manifold was glowing red hot like an oven!
At this point we are thinking one of three things have gone bad. Either
A. The timing is bad from when we took the crankshaft bolt off weeks ago to investigate for my oil leak.
B. The O2 sensor is bad.
C. The Cat Converter is bad.
I'm honestly at a loss. Should I have just trusted the codes and replaced the coils and wiring for it? Would it have gone this way anyway because of the timing? Am I even looking at the right possibilities? Any help would be appreciated. I just want to get her back on the road again. Thank you!
When that didn't work, I crossed it off my list and started doing more research. I bought a code reader to make pulling them easy, and it gave me a code 998 (limp mode), and a 224 (Erratic Ignition Diagnostic Monitor "IDM" input to processor). I know this has to do with the coils but we did some more research and some people were claiming that they changed their spark plugs and it fixed very similar issues. So this last weekend I tried that. I changed the spark plugs and the ignition wires. Went for a test drive. Didn't fix the problem. Still stuck in limp mode, but this time I had a surprise when I got home. The exhaust manifold was glowing red hot like an oven!
At this point we are thinking one of three things have gone bad. Either
A. The timing is bad from when we took the crankshaft bolt off weeks ago to investigate for my oil leak.
B. The O2 sensor is bad.
C. The Cat Converter is bad.
I'm honestly at a loss. Should I have just trusted the codes and replaced the coils and wiring for it? Would it have gone this way anyway because of the timing? Am I even looking at the right possibilities? Any help would be appreciated. I just want to get her back on the road again. Thank you!