ballmead

I just did the CFI to MPI conversion and have a slight problem. When the car is cold and I drive off, the power comes on, then stops, then comes on again. It hesitates like this until it warms up and then all is OK. If I start the car once warmed up, the first run through the gears has a less severe hesitation and then it settles down again.
My car is a 3.9L EBII with a 4 speed auto. I installed the full loom,sensors,dizzy,ECU, fuel pump etc from a EB 3.9 MPI 4 speed auto car.
Apart from the hesistation at start up, the car runs pretty good and has more mid to top end power.However,it does hunt a little at idle(in park).
Any ideas on what to look out for? Any advice will be appreciated.

Regards,

John

Aussiblue

Did you use the MPEFI inlet manifold gasket; the thick one with cutouts for the injectors?

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Regards Blue

ballmead

Hi Blue,

Yeah I did use the correct gasket. Any other ideas? Anyone?? Please???

clevoxt

Check coolant temp sensor.This sensor changes injection time depending on engine temp.When the car is cold it should tell the ecu to richen the fuel untill the engine reaches a specific temperature.Maybe your not getting enough fuel when its cold.

ballmead

Now we are talking. Sounds like a good place to start, thanks clevoxt.I'll check it out.

ballmead

Bugger, I installed a new coolant temp sensor but it made no difference. Any other ideas??