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Rough idle

R

robbo82

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My Vn 3.8l has a rough idle and when i rev it it stalls and sounds like its backfirring in the throttle body, have replaced plugs ,leads ,fuel filter,can any one HELP
 

88GreenVN

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Tube of injecter cleaner in the fuel tank would be a good start if you havent done it before.

Have you got any error codes from the computer? - this can be found somewhere on this forum.
 

Apoc

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Its dumb i know but check all your leads are goin to the right place eh :)

Apoc.
 
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Shanoqueeb

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agree with ex cop 5L, sounds like injectors/carbie is blocked or may have some crap in them
 

churbz89vn

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could aslo be the idle sensor in the throttle body, mine was doing similarm and repaced it for $90.00 and cleaned the throttle body n now is sweet.
 

lillgreen

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i too am having the same problem, had the injectors replaced about 6 months ago after injector cleaner didnt work, the car is on duel fuel and runs fairly ok on gas but when i go to run on petrol it idles rough then when i give it a rev it goes to die in the ass.
but after you back off with the pedal the revs come up for a second, im stuck with what to do.
 

immortality

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check your fuel pressure
 

vks

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if its running really **** missing and all that, try your Map sensor there is a hose going to the map sensor and the other end going to the intake for the (manifold absolute pressure). If that hose has come off than she will run **** thats what happend with mine. Ifound this out by bridging the connection to do a diagnostic test.

cheers chris
 
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