Ignition problems....

[earlsflyincobra]

Can't get the engine to fire................Help, please.....

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I am still trying to get an engine start and have been for 9 "LONG" months now.....

Here is the scenario.......

Ford 1989 5.0 motor.......MSD distributor (direct replacement for the stock Ford unit).....Crane coil.....Crane Hi-6 ignition box.....Miceotech LT10 ECU.

I have checked, double checked, and triple checked "ALL" of the wiring using the Microtech, Crane-hi6, and several troubleshooting wiring diagrams that are applicable, and have it just as the diagrams indicate.

The LT-10 self test mode fires the injectors and indicates no problems. The relevant lights on the LT-10 are Green and Amber, which are supposed to light upon power and the amber is supposed to indicate pulse ( I assume by blinking) during cranking. They both come on when power is applied but "GO OUT" while cranking.

The Hi-6 "RED" light comes on when the ignition is turned on, and blinks briefly as the igntion is turned off. According to the instructions it is supposed to blink while cranking, indicating it is receiving a trigger signal. It goes out during cranking. Also, according to the instructions, it can indicate different codes for troubleshooting, however none of the codes are displayed.

The coil sparks when the ignition is first turned on and sparks, with a beep, once or twice when the ignition is turned off.

I have called the shop where I bought the LT-10, several times, and the tech has not been very helpful on the phone. He wants me to trailer the car the 60 miles over to his shop so he can try and figure it out. He was supposed to come to me, twice in December, but was a no show both times.

I was given the name of a tech at a shop in Miami and called several times to talk to him, but he has always been too busy to talk and has not called back as promised.

Does anyone here have any ideas as to what the problem might be??

Thanks in advance for any information.

[Intmdtr]

the injectors should only fire peridically until the car is started...to avoid over-fueling. what is your fuel pressure at the rail? maybe its not getting any or enough fuel?

[earlsflyincobra]

Fuel pressure gage indicates 50 pounds at initial start try and drops off as it cranks........

[hotwheels]

I would say it has to do with your miceotech ECU. I have never worked with one but if you have spark and fuel, it has to be the ECU. If i were closer i would try a different ECU and see if it starts.

[earlsflyincobra]

ONE DAMN WIRE......not the suspected one but one just as important

17502301515_ORIG.flv video by earlsflyincobra - Photobucket

17502301515_ORIG.flv video by earlsflyincobra - Photobucket

[Loadclr]

That's always the way it is these things. Glad you found and got it running.

[earlsflyincobra]

Well, to let everyone know.....it was the power wire for the Microtech computer.....it was routed to the accessory side of the ignition switch....after being told to make sure the little red wire on the MSD went to the ignition side and not the accessory side, and after checking and making sure it did.......a LIGHT bulb turned on in my brain and I decided to check the power wire for the computer.....and Lo and Behold, it was the CULPRIT.....only took 9 months to figure it out....LOL....but, during that time I fixed several other minor problems that cropped up.......

Follow up......I had wired the MSD box in before the start......I took it out and wired the Crane box back in.....and it still STARTS..........WHOOOOOOOOPEEEE

[hotwheels]

That is awesome man.............I am freakin excited for ya, i know you have been working on this bad boy for a while now.

[earlsflyincobra]

After a little tweaking............

17547910350_ORIG.flv video by earlsflyincobra - Photobucket

17547910350_ORIG.flv video by earlsflyincobra - Photobucket

[91stang308]

man i bet that feels great to hear it running