I need some good Advice!!!
I need some good advice! I have an 89 E-150 w/ 302 EFI.
About a month ago I stopped at a store for about 5 min. When I came back to my van and started it, it was chugging & sputtering. After about 30 min of driving it cleared up and ran great. The next day, the same thing happened. This has gone on every day since...
So I tried running codes and the only code I got was for the Knock sensor.
Since then I have replaced the:
coolant temp sensor,
EGR valve position sensor,
fuel pressure regulator,
throttle position sensor,
I also tried a new map sensor but when that didn’t work I took it back.
I removed the EGR inspected it, cleaned it, the diaphragm looks good and is moving freely..
I have dropped the gas tank, drained it and replaced with fresh gas.
I took the van to a muffler shop to look at the catalytic converters and was told they are ok.
There are No overheating problems and the oil and water look good (no signs of one in the other)
The Van actually runs fantastic most of the time. It seems to only act up after it is warm and has been shut off and then re-started OR when at idle for a long period of time (long stop light or traffic).
This is driving me NUTS! ... Any advice would be greatly appreciated!!