Problems !

Sep 03, 2005 9 Replies

i just cleaned my throttle body and my iac with throttle body cleaner and now it starts up and idles perfect but if i touch th gas or switch gears it backfires extremely bad and shuts off please help i need to get it running again.



Examine carefully if all of the vacuum hoses are back in the right place

Regards,

Boris Mohar

Got Knock? - see: Viatrack Printed Circuit Designs (among other things)

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im 99% sure i got all the vacuum hoses in the right place but i guess it would hurt again could i have hit something in the throttle body? which is making it mess up?

Check the operation and adjustment of the throttle position switch. The manual states that carb cleaner should not be sprayed into the throttle body directly, but spray it on a rag and wipe it, otherwise cleaner can get into the switch and damage it.

Also, if the switch had been adjusted for a very dirty throttle butterfly, the cleaning may now have it at the wrong point. Just a thought.

Also, if you mention what car you have it might help get more specific answers.

__ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate"

im sorry it is a 1986 740 gle and i could have hit the switch but i used a rag with the clener on it and did it so i dont know.

I use cleaner directly and have never hurt the switch, but I usually remove the throttle body which involves removing the switch since it's in the way of a bolt. Do make sure the switch is adjusted correctly though, it should click just as the throttle begins to open.

what would be wring if it doesnt click could the switch be bad or just setu up wrong

James can correct me if I am wrong, but if you loosen the switch and turn it clockwise to the stop- then turn it counter clockwise as far as it will go WITHOUT having it move the throttle plate at all. This should put it at the point just before the switch engages. Tighten it at that point. Then, with the ignition OFF, if you open the throttle just a slight bit, you should hear the microswitch inside 'click.' it can also be checked with an ohm meter.. all that if it is the same as the LH 2.4 System in the B230F motor of '90... I think

__ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate"

I fixed the problem it was that when cleanign the throttle body i had knocked the switch a little losse and it was sucking air around it and also my amm censor was lose causing the problem too but after i fixed that it seemed to be working great idling around 800 rpms instead 1500 but a few days later my fuel pump has gone out should i spend the 140$ and get a napa pump or at autozone they are like 35$what is the difference?

Are you sure that it is not the fuel pump relay?

Regards,

Boris Mohar

Got Knock? - see: Viatrack Printed Circuit Designs (among other things)

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