Timing Qs on new EFI conversion

clutter · #1 (**permalink**) 10-29-2009, 09:48 AM

I am finishing my EFI conversion and am having a little issue with the timing and running. The truck is not streetable yet.

Specs - .030 overbore, E303 cam, stock H.O. intake and MAF, L1C EEC and a MAF, converted Crown Vic. harness.

Problem - With the SPOUT disconnected I can get the engine started and set the timing (currently 10 BTDC) so that the engine runs. When I connect the SPOUT the engine will continue to run for some time and seemingly well but when I shut it off it is very hard to restart. I mean really hard, engine does not want to turn over. I can sometimes get it to crank but most times I have to disconnect the SPOUT to restart.

This is my first EFI conversion (and this little set back has not discouraged me from my next) I have followed the article posted on this site along with diagrams and articles posted on forfuelinjection.com. One thing that I do need to mention is I may only be supplying 8-9vdc to the TFI on pin 3 which is the 12v Start Only.

FYI: I am posting in several other forums to get more coverage so don't be surprised if you see this elsewhere!

Thanks,

Krewat · #2 (**permalink**) 10-30-2009, 12:51 PM

Well, it's definitely over-advancing on start.

The only thing I can think of is that the PCM doesn't realize the key is in the START position. Is there any input to the PCM/wiring harness from the original vehicle when you turn the key to START?

clutter · #3 (**permalink**) 10-30-2009, 01:00 PM

Very interesting point. I will be working on it this weekend and will try to test for that. Any pointers that may help in doing this is GREATLY appreciated.

One of the answers I received in the same posting on other forums is verifying that I am at actual TDC at the cylinder then verifying that my balancer and timing tab are reflecting the same, possibly indicating that I am not in correct time.

Thanks,