Help!!!!

[lil_Blue_Ford]

Capacitors are known for going bad. Wonder if they cheaped on the rebuild and instead of replacing all the capacitors just replaced the bad ones. If you can, maybe check and see if there’s blown capacitors on the ECUs that ”died”

 

[CrabGuy]

Clean your grounds real well. On post 39 on my build, I show several of the locations of the grounds.

Bad grounds have caused me more issues on multiple vehicles I've owned over the years, especially to ECU's and starting problems. I've seen cables that look great on the outside but under the insulation were badly corroded reducing the gauge of the wire or increasing the resistance of the cable. Clean your grounding points and check the cables very well, especially at the ends.

 

[lil_Blue_Ford]

Yeah, grounds can play a big part too. I usually upgrade the 8 gauge body ground to a 4 gauge plus replace the main grounds and clean any grounds I come across. I’ve had grounding issues before. I make my own cables with welding cable and use No-Alox or Dielectric grease to keep corrosion at bay. No-Alox is electrically conductive and used by electricians for working with aluminum wire. Dielectric is not electrically conductive. Use as appropriate.

 

[Rusty Shackleford Gribble]

Capacitors are known for going bad. Wonder if they cheaped on the rebuild and instead of replacing all the capacitors just replaced the bad ones. If you can, maybe check and see if there’s blown capacitors on the ECUs that ”died”

So I ordered caps (higher voltage) and swapped out the two that were obviously replaced by the reman. Fired right up. I guess, since I a have a factory ecu from the scrap yard, I’m going to rock that one and see if it lasts. Worst case, I know how to “fix” them now and have plenty of caps. I guess either for a while or forever, I’ll drive around with a hot spare. Hoping this is the end of it though. Thank you all for your help.

 

[SenorNoob]

That's pretty shitty on the "rebuild" that they couldn't source decent capacitors to change. Especially if that and some cleaning and thermal paste is all they did.

 

[Rusty Shackleford Gribble]

For sure. They used the same value caps. I at least increased the voltage since they’re obviously prone to blowing. They were also run-of-the-mill cheap Ali express ones they used as well. No thermal paste. Not even a cleaning. Just replaced two caps, put it in a new shiny metal box and shipped it out.

 

[pentode]

Good move avoiding the AliExpress caps. For anyone who needs to do this job in the future, Digikey (and probably Mouser) lets you filter caps by grade - they sell automotive grade caps that are usually extra high temp rated and should be vibration resistant too.