bmxunderground
15+ Year Contributor
- 217
- 4
- Dec 11, 2007
-
Bowling Green,
Kentucky
I'm looking to see if I have covered all the ground I need to before continuing my repair of this 95' 420a N/T. I purchased this car from an old tuner friend for $100 dollars as he's moved to Germany. After three days of diagnosis outside in 10degree temperatures I cured the cars first problem of NO START. running through a battery of tests lead me to find a lack of fuel pressure which turned out to be worn out O ring on the fuel pump housing allowing the fuel to "fountain" back into the tank without making it to the rail. Just figured I'd put that out there for those collecting information on random problems to check for. Now back to my current issue.
The car starts and runs but the symptoms are as follows:
-loping idle
-hesitation when the gas pedal is pushed followed by poor "no balls" acceleration after hesitation passes.
-A/F gauge registers lean during hesitation
-intake backfire
Things tested today (or replaced during N0 START condition)
-spark plugs
-wires
-coil pack
-cam angle sensor
-ecu
-fuel pump
-fuel filter
-battery
-ASD/MFI relay
After flushing the fuel filter, the liquid coming out looked more like Amber Bach than gasoline so my first step in the morning is to remove the injectors and install 4 low mileage injectors I have in a box to see if it was severely clogged injectors. In case this doesn't solve the problem I wanted to hear some of your opinions. In line for checking are: Map sensor, IAC, TPS, and Crank angle sensor. Your input would be much appreciated. If I left anything out its because I'm frozen and tired, thank you.
The car starts and runs but the symptoms are as follows:
-loping idle
-hesitation when the gas pedal is pushed followed by poor "no balls" acceleration after hesitation passes.
-A/F gauge registers lean during hesitation
-intake backfire
Things tested today (or replaced during N0 START condition)
-spark plugs
-wires
-coil pack
-cam angle sensor
-ecu
-fuel pump
-fuel filter
-battery
-ASD/MFI relay
After flushing the fuel filter, the liquid coming out looked more like Amber Bach than gasoline so my first step in the morning is to remove the injectors and install 4 low mileage injectors I have in a box to see if it was severely clogged injectors. In case this doesn't solve the problem I wanted to hear some of your opinions. In line for checking are: Map sensor, IAC, TPS, and Crank angle sensor. Your input would be much appreciated. If I left anything out its because I'm frozen and tired, thank you.