4.2 problems
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Member
Joined: Nov 2014
Posts: 32
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From: south Texas
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
Senior Member
Joined: Mar 2011
Posts: 153
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From: Raleigh, North Carolina
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.
Senior Member
Joined: Jul 2014
Posts: 2,281
Likes: 177
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