3 years of random misfire
Oct 2, 2016 | 02:05 PM
#21
FormerVendor
Joined: Oct 2015
Posts: 57
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From: Denver
re: misfire
and go get this truck to a snap-on motorvac. this is the best way to check for vacuum leaks. an engine builder i know (motorcycles and powersports/jetskis) uses it on every engine he works on. he gets surprised all the time. worth the $80 to have it done.
Oct 2, 2016 | 02:06 PM
#22
Thread Starter
Teching In
Joined: Oct 2016
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Ive done smoke test no leaks whats so ever
Oct 2, 2016 | 02:07 PM
#23
Thread Starter
Teching In
Joined: Oct 2016
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Swapped engine, ecm, coils, wires, plugs, injectors, going to assume new intake gaskets when engine was replaced, no cats to be clogged, its starting to sound like a harness issue of some sort.... Could be a broken wire at the crank sensor, an issue with injector circuits or coild circuits or anything in between.... Have you by chance checked the map sensor and maf/baro sensor against what they are actually reading? Going to assume youve checked for vaccum leaks including the brake booster....
Oct 2, 2016 | 02:11 PM
#24
Sounds like a harness.... I know at this point we are probbaly starting to sound like we are beating a dead horse, but you either have some sort of vaccum leak or a harness issue whether its a ground issue or whatever but you have eliminated all lther possiblities.. Time to look into a new harness!!!
Oct 2, 2016 | 02:15 PM
#25
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Teching In
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Sounds like a harness.... I know at this point we are probbaly starting to sound like we are beating a dead horse, but you either have some sort of vaccum leak or a harness issue whether its a ground issue or whatever but you have eliminated all lther possiblities.. Time to look into a new harness!!!
But i wanted to know if some face this before
Oct 5, 2016 | 10:45 AM
#30
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Teching In
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