Starting problems - Gen3 conversion.
Posted: Thu May 24, 2018 9:18 am
New issues - still trying to make BIR this weekend. Long post follows.....
Car finally started after several attempts. When it started, it idled at 2500 RPM so we killed it right away. Tried to start again and it wouldn't fire. Cycled power several times and got it to run again - all pressures looked good and the motor got warm but it was idling high and "surging" while idling. Shut it off after a couple of minutes. Tried to start again a few times - turns over just fine - but it would't fire. After a few more tries it would start, but one time it stopped on it's own. Now it won't start/fire at all.
Notes -
-It only starts/runs when the fuel pump cycles at power up. If the pump does not cycle at power up, it won't start.
-The fuel pump does not cycle every time at power up. However, the fuel pump runs EVERY time the manual button button is pressed.
-Manually running the fuel pump while cranking does not help
-There is no spark when the pump fails to cycle at power up.
-Swapping relays did not help
-When it runs, it idles high and surges a few hundred RPM
Other notes:
-Gen3 kit used for conversion is 1.5-2 years old. Kit was purchased with a Gen2 car.
-Fuel system build pressure just fine when manual button is pressed.
-The ECU light is steady (not flashing)
-Don't know much about the ECU software, but on a diagnostic page I could find no sensor errors (need to investigate further)
-The TPS has been calibrated.
-After I bought the car late last year, I had issues where the car would run for 10 minutes then sputter then die. At the end of the weekend it would not start at all.
-I used no Gen2 harnesses - I bought a Gen3 chassis harness. The only carryover Gen2 parts that I can think of are the fuel pump, master switch and throttle body/TPS.
Any ideas are welcome.
Ron
Car finally started after several attempts. When it started, it idled at 2500 RPM so we killed it right away. Tried to start again and it wouldn't fire. Cycled power several times and got it to run again - all pressures looked good and the motor got warm but it was idling high and "surging" while idling. Shut it off after a couple of minutes. Tried to start again a few times - turns over just fine - but it would't fire. After a few more tries it would start, but one time it stopped on it's own. Now it won't start/fire at all.
Notes -
-It only starts/runs when the fuel pump cycles at power up. If the pump does not cycle at power up, it won't start.
-The fuel pump does not cycle every time at power up. However, the fuel pump runs EVERY time the manual button button is pressed.
-Manually running the fuel pump while cranking does not help
-There is no spark when the pump fails to cycle at power up.
-Swapping relays did not help
-When it runs, it idles high and surges a few hundred RPM
Other notes:
-Gen3 kit used for conversion is 1.5-2 years old. Kit was purchased with a Gen2 car.
-Fuel system build pressure just fine when manual button is pressed.
-The ECU light is steady (not flashing)
-Don't know much about the ECU software, but on a diagnostic page I could find no sensor errors (need to investigate further)
-The TPS has been calibrated.
-After I bought the car late last year, I had issues where the car would run for 10 minutes then sputter then die. At the end of the weekend it would not start at all.
-I used no Gen2 harnesses - I bought a Gen3 chassis harness. The only carryover Gen2 parts that I can think of are the fuel pump, master switch and throttle body/TPS.
Any ideas are welcome.
Ron