351w no spark
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Mountain Pass
Joined: May 2012
Posts: 100
Likes: 0
From: South of Butler PA
351w no spark
I just swapped a 351 in place of my 302. And I have a no spark condition. I have power at the + side of the coil, and power at the - Side too. Isn't the ground side souposed to pulse while the engine is cranking? It's not, distrubutor was in a running truck last week. Still using the 302 duraspark box, new super stock coil. Thanks
Postmaster
Joined: Mar 2011
Posts: 2,698
Likes: 7
From: Taxachusetts
A no blink test light situation while while the engine is cranking means the coil isn't getting switched - indicative of a bad ICM or no power getting to it.
Do the power check as DB429SJ suggests.
What year is your 302 and 351? Ford made different modules for different years - maybe they're not compatible? Not sure on that one....mebbe it makes no difference with the same year 302 and 351?
Do you have the blue grommet on the ICM? Also, check your wiring color codes on the plugs....they might fit each other but mebbe they don't match the insulation colors.
Do the power check as DB429SJ suggests.
What year is your 302 and 351? Ford made different modules for different years - maybe they're not compatible? Not sure on that one....mebbe it makes no difference with the same year 302 and 351?
Do you have the blue grommet on the ICM? Also, check your wiring color codes on the plugs....they might fit each other but mebbe they don't match the insulation colors.
Thread Starter
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Mountain Pass
Joined: May 2012
Posts: 100
Likes: 0
From: South of Butler PA
UPDATE:
I have power at the Red wire on run, White wire on start.
The coil has voltage on both sides, still not pulsing.
I tried a known good box off of the truck the distributor was out of (truck drove to my house with that box) Didn't work
Should there be any power coming out of the four prong connector?
Purple/orange should go to the distributor?
Black is the distributor ground
Green is the tach/coil -
Right?
I have no power going to the pickup coil, I dont know if it's souposed to have any. Possible my distributor ground isn't working?
I have power at the Red wire on run, White wire on start.
The coil has voltage on both sides, still not pulsing.
I tried a known good box off of the truck the distributor was out of (truck drove to my house with that box) Didn't work
Should there be any power coming out of the four prong connector?
Purple/orange should go to the distributor?
Black is the distributor ground
Green is the tach/coil -
Right?
I have no power going to the pickup coil, I dont know if it's souposed to have any. Possible my distributor ground isn't working?
Postmaster
Joined: Mar 2011
Posts: 2,698
Likes: 7
From: Taxachusetts
Check stator resistance on DSII - separate the distributor harness and ohm out the orange and purple connections. If you have between 400 - 1K ohms, the stator is good - and check the wiring between the dizzy and ICM. If the resistance is different, replace the stator assembly.
You should have continuity between the distributor shaft and a good, clean engine ground. If not, clean off the paint, rust, etc from the distributor's base.
You should have continuity between the distributor shaft and a good, clean engine ground. If not, clean off the paint, rust, etc from the distributor's base.
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