No start… Initially thought In-tank fuel pump, but it was throwing a code for the CPS. Replaced cps this afternoon and all went well. There are no longer any codes stored in the obd system. Anyways...back to fuel pump because it still wont start.

If I jump power to fuse 4 I can get it to start but ...

lummert wrote:Now that the problem is solved, take the cover off the bad ECU and look for something gone wrong.

I took it apart, but I am not even remotely sure of what to look for! There is a lot going on under there

I replaced ECU with a working used part. I can now plug IAC in and all is well. Cleaning the terminals was a good idea anyway on the connector, so I went ahead and did that. I just hope this ECU doesn't burn up somehow - - especially considering I am not sure what caused the failure on the last one ...

Whenever I hit a bump (e.g. manhole cover, pothole, railway tracks etc), my front end shudders and I can feel it very strongly in the steering wheel. Any thoughts?

Cleaning ecu connection as discussed above - worth trying? Or is bad, bad?

Bad ecu. Plugged in a good one (borrowed) and idle was fine

So since it runs fine unplugged what's the motivation to plug it back in?

Should I be concerned with the ECU??

93Regina wrote:
With engine warm, and turned off, disconnect IAC's electrical plug...then fire it up.

Idles much better

So I found an IAC at the jy and replaced mine. Now my idle is unbelievably high. As if the pedal is to the floor. So I put back the one that was on my car, and the idle is still out of control high. Any thoughts? (tps is adjusted correctly).