Ive got fuel delivery issues... looking for ideas

[NoSLowFiveO]

havnt had alot of time to tune my car since getting it back together in July. I have found that I Dont have any fuel being delivered to the #1 cyl. The car has a new/rebuilt 306 bottom end, Edelbrock 6025 heads, AFM N-61 cam, and Edelbrock RPM upper and lower intake. 75mm mass air and 24# injectors with the stock A9P computer and no chip. EGR stuff has been deleted and Im running a MSD 6AL.

On cold startup, the car will NOT fire on the #1 cyl. When it reaches about 190 degrees it will start to fire on that cyl but usually only after 1/2 throtle has been aplied. I dont get it...?

Ive traced it to the injector harness by switching the first and second injector harnesses and noticing that the #1 was then fireing but the second was not. anyone ever heard of this happening?

-Justin

 

[jrichker]

You have either a bad harness, bad 10 pin connector, or bad computer.

See http://fordfuelinjection.com/harness.html for help with the wiring.

Unplug the black 10 pin connector & leave the injectors plugged into the harness. Using the above diagram, check the engine side of the harness for 12-15 ohms between the center pin and pin 6 (tan wire). Greater than 15 ohms, and you have a broken wire or bad crimp on one of the connector pins for the injector to 10 pin connector harness.

Remove the passenger side kick panel, and disconnect the 60 pin computer connector. Find the tan wire on pin 58 and jumper it to ground. Then measure resistance between ground and pin 6 (tan wire) in the chassis side black 10 pin connector. You should have less than 1 ohm. More than 1 ohm means you have a broken wire or bad crimp on one of the connector pins for the computer to 10 pin connector harness.

If both of the resistance checks passed the test, the computer is at fault.

 

[NoSLowFiveO]

wow, thats more then what I thought I may have to do but thank you very much for the information. everything ran fine before the motor/trans swap over the winter. I did change the computer to the A9P thats in it now (got it from a friend) so Im guessing thats the problem. Ill run through everything anyway just to be sure. Thanks again!

-Justin