351 with no spark

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Apr 22, 2009 | 06:56 PM

highoctane74

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More Turbo

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From: Edmonton, Ab

351 with no spark

I am trying to get an engine going.Its a 351 in a truck i just bought, not sure what shape its in. i have tried changing the coil and computer , turns over good and still nothing.the ignition is missing to i jumped a wire from the battery to the coil, have done this to get some older ones going but not sure if it works on a 79.

Apr 24, 2009 | 10:21 PM

joker2

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fuel injected or carb? electric fuel pump? When you turn the key, can you hear the fuel pump cycle? Do you have fuel pressure? Do you have spark?

Apr 24, 2009 | 10:24 PM

joker2

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Do yo0u have spark? Do you have fuel pressure? If it is injected, can you hear the fuel pump cycle when you hear the key?

Apr 25, 2009 | 03:32 AM

351M

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From: Prince George, B.C.

So... 351 with NO spark, it is in a '79 according to what I read in the original post... You tried changing the computer? If the truck is a '79 you mean the duraspark box? it is very possible that the pickup in the distributor is toast. That is really the only other thing that can be wrong if you have power to the read and whote wires on the smaller plug to the duraspark system(one is powered while cranking the other in run)

Apr 25, 2009 | 05:10 AM

NumberDummy

Ford Parts Specialist

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From: Simi Valley, CA

Quote:

Originally Posted by highoctane1974

...but not sure if this works on a 1979.

If this truck is a 1979: There are NO computers, NO electric fuel pumps, NO EFI on a 1979 truck...or car.

These parts did not appear until the 1980's.

No spark: It could be the DuraSpark ignition module, it could be the stator aka pickup coil inside the distributor, it could be both.

The same stator fits all 1974/79 cars/truck.

D4PZ12A112A .. Stator (Motorcraft DU1A).
-------------------------------------------
The ignition module is prolly the BLUE module, so called because it has a blue plastic square on the module just above where the wires feed out.

This module was used 1976/79, and well into the 1980's on cars/trucks (1976/78: except CA).

1U2Z12A199AA .. Ignition Module (Motorcraft DY893).

The ignition module is mounted vertically up against the left fender inner apron just in front of the firewall. Engine heat (especially on V8's) is the mortal enemy of these modules.

If it's replaced, use some washers to further space it away from the apron.

The more airflow around the module, the longer it will last.

Apr 25, 2009 | 07:12 AM

mistakenID

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From: West Valley Utah

Make sure the ground inside the distributor is clean and tight. I've seen a loose ground in the distributor quite a few times cause trouble.

Apr 25, 2009 | 10:52 AM

highoctane74

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From: Edmonton, Ab

well i took the duraspark off my other truck and what do you know it worked, its from a 429 truck but seems to work fine. Funny I tried 2 new ones and nothing?? Thanks guys....