frustrated 94 Pontiac gran prix 3.1 idle speed to high?

Question

here is the problem i took off the top part of the manifold to fix fuel leak now the idle speed motor quit working i have eliminated the possibilitys of vacume leaks or throttle plates i replaced the idle valve with thesame results if i manualy set the valve and leave it unpluged its ok but if i plug it in turn off the car the computer steps it up and wont shut itdown i think i must of broke a wire somewhere or could the tps be readig wrong to keep it up can i get a wiring diagram with a diagnostic flow chart any help appreacitaded

i must have broke i wire thats why i need to find a way to test them and its not a dodge so the key on of on thing wont work on it there isnt any codes comin up on it and ive been dealing with it for a week so lettin it run isnt working either there is no vacumr leak ive re checked that its whatever controled the idle valve to slow it down

Answer 1

Its not a vacuum leaks in system, positively, because fuel injection system will not works if there's a air leaks in system. Since your last idle position was programmed and controlled by your car's computer management system, its not recognized a new idling position of the new idle valve..then you needs to reset the computer. Remove positive of your battery and the cable from your idle valve let it sit for about 5-10 mins then reinstall the battery cable..then the idle-valve, this procedure sometimes delete the car faulty errors and erase its last recorded position of the ile valve. After plug in the cables, don't start the engine yet, let the computer learn the new idle position then start the engine, if you remove the idle-valve cable while the engine is running, the computer thinks that your car needs wide open position at all time and that was your problem. Good luck!

Answer 2

On my old Pontiac, replacing the valve meant the idle speed was very high for about 3 minutes, then as the computer began adjusting the pintle, the speed came down...

So, let it run for at least a few minutes to allow the computer to move the pintle...if after several minutes it isn't dropping the idle, the new valve is probably defective.

Answer 3

Soundls like you have a vacuum leak - either unplugged hose of damaged plenum gasket. Try spraying starting fluid on the top of the engine in defferent spots. If idle changes - it is leaking vacuum.

Answer 4

humm, if its electrical it will be hard to find,
ARE you sure there are no air leaks ???????

it may be your maf sensor also, but i would recomend getting an engine computer diagnostic.

If you are able to get a book on that car you can read the trouble code from your dashboard, by turning the key like your about to turn it on three times quickly and leave it in the almost turned on position at the end this will make your check engine light flash a code, then look in the book

Answer 5

where was the fuel leak? if you disturbed the injectors you probably pinched or broke an o-ring seal on one or more of the injectorsand have a vaccum leak' sometimes a vaccum leak is hard ti pinpoint'
if the car was running ok before you fixed the leak then its something you did when you disassembled it so you should backtrac'

Answer 6

IF YOUR THROTTLE VALVE IS DIRTY ,THE VALVE MAY NOT BE CLOSING ALL THE WAY. OR, POSSIBLY THE INTAKE MANIFOLD COULD HAVE AN INTERNAL-EXTERNAL

Answer 7

defective idle valve that You have in Your hand.

Answer 8

O2 sencsor?

Answer 9

i would say that you have a computer problem . take to your local meckanic , he,ll know what to do.

Answer 10

ill see what i can find ill get back with you