4.2 problems
09-02-2015, 06:34 PM
#1
Member
Thread Starter
4.2 problems
i have a 1999 4.2 with 211k miles, 2wd and auto tranny, yesterday on the freeway it downshifted and i felt a big clunk and it shifted like this 3 total times, i don't know what caused this or what it means, never had any problems with the tranny before,
another thing is sometimes it takes a bit longer to start and then it idles poorly but goes back to normal, i have sea foamed the intake, cleaned the mass air flow and idle air control, and that fixed the problem for about 2 weeks, dont know what t do about that either.
any help is appreciated
another thing is sometimes it takes a bit longer to start and then it idles poorly but goes back to normal, i have sea foamed the intake, cleaned the mass air flow and idle air control, and that fixed the problem for about 2 weeks, dont know what t do about that either.
any help is appreciated
09-03-2015, 03:20 PM
#2
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Join Date: Mar 2011
Location: Raleigh, North Carolina
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i have a 1999 4.2 with 211k miles, 2wd and auto tranny, yesterday on the freeway it downshifted and i felt a big clunk and it shifted like this 3 total times, i don't know what caused this or what it means, never had any problems with the tranny before,
another thing is sometimes it takes a bit longer to start and then it idles poorly but goes back to normal, i have sea foamed the intake, cleaned the mass air flow and idle air control, and that fixed the problem for about 2 weeks, dont know what t do about that either.
any help is appreciated
another thing is sometimes it takes a bit longer to start and then it idles poorly but goes back to normal, i have sea foamed the intake, cleaned the mass air flow and idle air control, and that fixed the problem for about 2 weeks, dont know what t do about that either.
any help is appreciated
As far as the the idle: When's the last time you checked your fuel delivery? I had some similar issues and I ended up replacing fuel pump, fuel filter, fuel pressure regulator and my baby ran a whole lot better and I didn't have any stalling issues.
09-05-2015, 09:31 AM
#3
4.2 problems
Originally Posted by mjs757
i have a 1999 4.2 with 211k miles, 2wd and auto tranny, yesterday on the freeway it downshifted and i felt a big clunk and it shifted like this 3 total times, i don't know what caused this or what it means, never had any problems with the tranny before,
another thing is sometimes it takes a bit longer to start and then it idles poorly but goes back to normal, i have sea foamed the intake, cleaned the mass air flow and idle air control, and that fixed the problem for about 2 weeks, dont know what t do about that either.
any help is appreciated
another thing is sometimes it takes a bit longer to start and then it idles poorly but goes back to normal, i have sea foamed the intake, cleaned the mass air flow and idle air control, and that fixed the problem for about 2 weeks, dont know what t do about that either.
any help is appreciated
