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1991 Dodge Dakota No spark


23 replies to this topic

#21 B10alia

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Posted March 23, 2012 at 08:09 am

The rubber jello is potting compound or something similar to keep moisture off the main board. Personally, I would replace the ECU if you're 100% positive that the connectors aren't the problem, that potting compound makes any repair work that much harder.

#22 TWX

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Posted March 23, 2012 at 11:11 am

I'd also speculate about the wiring itself that plugs into the ECU, as the copper wiring will conduct heat very effectively. You might even want to look at what the wiring plugs into most directly next.

#23 Jerry V Jarvis

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Posted May 30, 2012 at 12:52 am

Hello People,I am having the same no start problem.What started this puzzle is on the way home from picking up my father from the hospital the truck died while sitting for a red light.Had the truck towed home and getting my dad setteled in,I sterted looking into why.I found the center button contact missing from the dist cap.I replaced both cap and rotor and tried starting the truck up to no avail.I own a Dodge Dakota service manual for the 91.I went through all the testing and code readings and all point to a running engine.The battery was replaced earlier this year.The truck does have 341,834 miles on it.Not sure if the engine is original.The timing chian appears to be correct as judged by the rocker arms.I have spark at coil and at plugs,The fuel pumps shoots a stream almost past the front grill.The injectors are working( you can see the spray when the sun shines on the tbi).The only codes I get are for no altenator field wiring and regulator.The truck has 70s type electronc reg.I have another ecm and tried that to no avail.Both my dad and I are stumped.We both havent seen anything like this.But we are somewhat old school mechanics.I checked all fuses as well.I switched the asd relay with all the other relays.Im sorry for the length of this just furustrated.I've always bragged if its a Dodge I can get it running.Its never broke down.Not this time though.Thanks

#24 Bob Lincoln

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Posted May 30, 2012 at 07:40 am

This is a tough one, as someone has messed with it by installing a 70s vintage regulator. The voltage regulator circuit is in the ECM in a stock truck. So it's anybody's guess as to how this external regulator is connected.


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