URGENT : CFI->MPI, no spark - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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post #1 of 6 (permalink) Old 05-06-03, 12:36 AM Thread Starter
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URGENT : CFI->MPI, no spark

Hey guys,

Just been doing a MPI conversion. Started on Sunday morning with a bare manifold. We went around looking for the loom, throttle body and sensors and when we finally had the stuff we mixed and matched to get a complete manifold.

The loom was virtually complete bar a ignition coil plug, we just found another one and wired it up, all good.

Anyway, after almost 8 hours straight working on the car, we were ready to start it. Crank, crank, crank...no start. Got the timing light out and hooked it up to the number 1 lead, no spark. Number 2 lead, no spark.

After a bit of messing around, we though it was the TFI. Replaced the TFI, same story. Replaced the coil, no spark still! We then called Simon (Bass_Crazy) up and he suggested that the distributor may be stuffed. After exchanging the dizzy for a working one, we spent another hour putting it in. Still no spark!

There is 12v at the coil plug but there seems to be no spark coming from the coil. There was only one wire left un-attatched, it was a light pink/cream coloured one and when traced back to the injector loom plug it was found to join up to a brown wire with blue bands. I joined that up to the corresponding wire on the TFI loom. Still no spark!

I feel that the loom may be stuffed (ie. shorted along the line somewhere), but does anyone have any suggestions.

We have ruled out the following :

*TFI Module
*Ignition coil
*Bad connection at the coil



Thanks in advance,

Sundeep and Kenaz

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post #2 of 6 (permalink) Old 05-06-03, 12:50 AM
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Hey sunny...

I think the best thing to do in yer situation is to probe back all the ignition wires to the ECU. Maybe yer PIP or SPOUT signals isnt getting to the ECU? Check yer TFI ground. Check continuity between TFI and ECU....

from TFI -
Brown wire (PIP) to ECU pin 56
Yellow/Green (SPOUT) to ECU pin 36
Black (TFI Ground) to ECU pin 16
TFI should have 2 Red wires, both +12V
Pink/Blue wire should go to yer coil (-ve) terminal.

Hope this helps


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post #3 of 6 (permalink) Old 05-06-03, 02:20 AM
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Pink/blue is the tacho wire, connects from the back of the dizzy to the coil, then (I'm pretty sure, but don't have the diagram handy) to the square plug and round to the dash.

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post #4 of 6 (permalink) Old 05-06-03, 02:26 AM
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Check the 2 red wires that go to the middle 2 terminals of the TFI module.1 should have 12v with ignition on and the other should have 12v when you are cranking the engine.

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post #5 of 6 (permalink) Old 05-06-03, 09:38 PM Thread Starter
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Thanks guys!

Unfortunately, after three days of persevering Ash has decided to call in the professionals. We hope it's going by 9am tomorrow morning.


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post #6 of 6 (permalink) Old 05-06-03, 09:47 PM
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I had the same drama sundeep, called the sparky in and it was something to do with the earth wire between the ECU and TFI, he mad a new earth point near the ECU and all was well
hope u get it sorted

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