We will start with the history. I recently purchased this car knowing of a long list of issues which have been worked out for the most part. The related piece would be random misfires which I believed were based on a faulty Ignition Coil (common on this 420a [2.0 NA] motor.) I have replace the coil but the issue persists.
Now what is happening is after about 20-30 minutes (or miles) of driving the fuel pump will overheat and the car will stall. I can get it to turn back over most of the time but it will stall out if attempting to drive. I have to leave it sitting for about 15 minutes to be able to move it.
What codes am I getting from the CEL? Nothing. (No CEL)
What have I tried so far?
- Fuel pump has been replaced
- Fuel filter has been replaced
- Fuel lines have been verified (no noticeable leaks, unwanted bends, pinches or breaks)
(I also verified that this is not an issue with the PCV valve or EGR [electric in this car] valve)
I know… I thought relay or wiring also - but all lines and the relay are cool to the touch so they are not overheating.
If anybody out there has some input as to what may be causing my pump to overwork itself - I would be forever in your debt. At this point I am throwing part after part at an issue that seems to be a purple unicorn. It also isn’t a lot of fun to hot swap fuel pumps in the back seat of your car on the side of the highway so this can’t be a long term scenario for me.
Thanks in advance.