Toby_Goodmk
Test Fit officianto
- Joined
- Dec 9, 2011
- Messages
- 1,851
I thought about doing this awhile back and forgot to post about it upon one of my many "gremlins" that appear from time to time. I thought it would be fun, and or maybe beneficial for when a gremlin pops up, what was the symptom, the diagnosis and solution. I bet there are many that may be able to use a search function to benefit from a similar issue.
Symptom: Today I get into my car to drive to work. All starts up well, pull out of the garage, AF goes rich and eventually stalls out. As the ATS warms up the symptoms are changing. The car quits immediately as the day goes on and the temps outside and in the intake warm. Symptoms go from rich condition to immediate stall. Car immediately stalls turning the wheel. Getting MAP codes, 02 sensor codes, cam sync codes.
Diagnosis.
1. Take a data log to see on screen WTF.
2. Text Cal since he is superman.
3. Send log to Cal
4. Recommended to look at MAP circuit.
5. Replaced MAP sensor, symptoms are similar, and a little better, but immediate stall.
6. Drive car at lunch, car immediately quits when turning to the left
7. Look at wiring under dash that supports power to the ECU, all checks out ok.
8. Coil pack grounds check out ok
9. Coil pack hot wire bypass, checks out ok (by passed the hot wire installed directly with factory wiring)
10. Examine wiring at ECU to make sure any connections are ok at FAST ECU, all checks out ok.
11. Test fuel pump relay at fender all checks out ok, tap tap....all ok.
12. Examine wiring from MAP green wire to PAC ALKY control box to FAST MAP circuit. Pull wiring while car is operating, immediate stall. Bingo.
So it appears the wiring going into the pac box for the alky system has come loose and will need reconnected. Better yet, will be soldered. Every time I turned a certain way the wire under the dash would get pulled and make an open in the MAP circuit causing the car to stall.
Action:
Don't use butt connectors.
Symptom: Today I get into my car to drive to work. All starts up well, pull out of the garage, AF goes rich and eventually stalls out. As the ATS warms up the symptoms are changing. The car quits immediately as the day goes on and the temps outside and in the intake warm. Symptoms go from rich condition to immediate stall. Car immediately stalls turning the wheel. Getting MAP codes, 02 sensor codes, cam sync codes.
Diagnosis.
1. Take a data log to see on screen WTF.
2. Text Cal since he is superman.
3. Send log to Cal
4. Recommended to look at MAP circuit.
5. Replaced MAP sensor, symptoms are similar, and a little better, but immediate stall.
6. Drive car at lunch, car immediately quits when turning to the left
7. Look at wiring under dash that supports power to the ECU, all checks out ok.
8. Coil pack grounds check out ok
9. Coil pack hot wire bypass, checks out ok (by passed the hot wire installed directly with factory wiring)
10. Examine wiring at ECU to make sure any connections are ok at FAST ECU, all checks out ok.
11. Test fuel pump relay at fender all checks out ok, tap tap....all ok.
12. Examine wiring from MAP green wire to PAC ALKY control box to FAST MAP circuit. Pull wiring while car is operating, immediate stall. Bingo.
So it appears the wiring going into the pac box for the alky system has come loose and will need reconnected. Better yet, will be soldered. Every time I turned a certain way the wire under the dash would get pulled and make an open in the MAP circuit causing the car to stall.
Action:
Don't use butt connectors.