View Full Version : Throttle sticking wide open
Having issues with the throttle. It stuck wide open but the throttle plate is closed and the throttle cable is fine, cruise control is also switched off and the cruise control cable is functioning properly. Any ideas? The tps is new the only thing left is the iac.
LTb1ow
03-17-2013, 07:04 PM
Wait, how can it be stuck WOT, but the throttle plate is closed, how the **** does that even make sense.
Exactly its acting like its wide open but the throttle plate is closed. I shut off the car, grabbed the cable at the throttle body, pulled it wide open and let it snap shut, turned the car back on and it immediately revved to the limiter. Its only after being wide open that it does this.
how fast does it rev up to the rev limiter.
sorry i didnt coreectly read the op
LTb1ow
03-17-2013, 07:10 PM
Is there a throttle body blade in it ...?
It's revving to the limiter with the throttle blade shut? Or the blade didn't shut after grabbing the cable
The blade is shut, but it still revs like its wide open. Only after its been wide open tho.
The blade is shut, but it still revs like its wide open. Only after its been wide open tho.
and youre manually closing that tb and its still going wot?
S.J.SLEEPER
03-17-2013, 07:15 PM
If engine revs up to the moon w/throttle blade closed. Sounds like a huge vacuum leak, possibility the vacuum port at rear of intake snapped off or vacuum hose to brake booster popped off?
verify blade is actually attached.
If engine revs up to the moon w/throttle blade closed. Sounds like a huge vacuum leak, possibility the vacuum port at rear of intake snapped off or vacuum hose to brake booster popped off?
verify blade is actually attached.
yes but only after he revs.
if so it'd do that at startup
Careful with the nonsense
and youre manually closing that tb and its still going wot?
Yes I did a run at atco and it was stuck wide open or seemed to be, I turned the car off, removed me floor mats and pumped the pedal, started it abck up and it did the same thing. I then got out of the car and popped the hood and grabbed the throttle cable and pulled it wide open and let it snap shut the car did the same when I started it again.
okay can you have someone start the car while manually holding the throttle body shut.
not letting it snap
The cruise would physically keep the blade open
okay can you have someone start the car while manually holding the throttle body shut.
not letting it snap
If theres someone with me when it does it, its intermittent I cant duplicate the issue.
If theres someone with me when it does it, its intermittent I cant duplicate the issue.
Soo it won't happen unless you are alone?
The cruise would physically keep the blade open
It was switched off at the stalk. I guess it could have malfunctioned, its either that or the IAC that could be the issue.
Soo it won't happen unless you are alone?
Its intermittent and I cannot duplicate it, it happend once before a few years ago with someone else in the car, I assumed it was the cruise control and have since leave it switched off when not in use. This time it happened at the track and I stopped at the end of the return lane.
It was switched off at the stalk. I guess it could have malfunctioned, its either that or the IAC that could be the issue.
i had iac issues but never wot'd me
Jersey Mike
03-17-2013, 07:27 PM
Have you:
verify blade is actually attached.
If so, maybe it is a vacuum leak, like Curt says. Grab a can of carb cleaner and your prescription glasses and investigate.
ISounds like a huge vacuum leak, possibility the vacuum port at rear of intake snapped off or vacuum hose to brake booster popped off?
Have you:
If so, maybe it is a vacuum leak, like Curt says. Grab a can of carb cleaner and your prescription glasses and investigate.
A vacuum leak only after a WOT pull? One that bad would do it as soon as I started the car, always.
LTb1ow
03-17-2013, 07:28 PM
If the blade is stuck shut and unconnected to the cable...it still hits WOT, how is this related to the cable, cruise control, the easter bunny etc?
nope. can only be the little motor thingy majigger that opens the tb for cruise and closes tb when traction loss. its malfunctioning somehow.
He said he verified the throttle body was CLOSED while the car revved. The cruise box manipulates the blade. If it was cruise. The blade would open
LTb1ow
03-17-2013, 07:32 PM
He said he verified the throttle body was CLOSED while the car revved. The cruise box manipulates the blade. If it was cruise. The blade would open
Right, so, either a massive vac leak in TB blade, IAC somehow allowing enough air for WOT, or santa claus
thats not correct. he said he verified it was shut when he restarted the car. he snapped it shut. he cant confirm the tb was manually closed. thats why i asked him to get a friend to manually keep it shut.
thats not correct. he said he verified it was shut when he restarted the car. he snapped it shut. he cant confirm the tb was manually closed. thats why i asked him to get a friend to manually keep it shut.
He can do that alone with the hood open and lid/ maf off the car
yes he can, but he did not verify the tb was closed while it revved to the moon as you said.
b4c are you going to try this?
yes he can, but he did not verify the tb was closed while it revved to the moon as you said.
b4c are you going to try this?
Next time it does it, like I said intermittent problem that I cannot duplicate. Last time It did it I popped the hood and grabbed the cable at the throttle body, pulled it wide open and shut it, I did not have the maf/bellows off to look at it but the cable was slack and the pedal was not stuck on the floor.
OK... serious post here...
My 01 SS had a similar random issue... If i would go full throttle, sometimes the pedal would stay on the floor and the car would keep going wide open. It happened a handful of times yet no one ever believed me and thought I was just messing around. One day my friend was driving it and happened to him too. When it did occur, I'd just keep kicking the gas pedal and within 2-3 seconds it would go back to normal. It scared me and I started seeing what variables were consistent when it would happen. I finally realized that if cruise was not in the full off position is the only times it would happen. Even though cruise was not engaged, it would only happen if cruise control was technically on "standby". Make sure the switch is in the full off position and see if it still happens. That ended my issues. Now if it still happens, I don't know what to tell you.
S.J.SLEEPER
03-17-2013, 11:23 PM
Ok, My previous post was being typed as B4c posted that it was after blade being wide open & snapped shut, so I didn't see it.
So...no, I don't believe ther is a vacuum leak. Reading all the comments you have made regarding how, when, & the intermittent events, I would say it is one of2 or 3 things.
1st. off throttle blade doesn't have to be wide open for engine to reach high rpms due to no load on the engine when started, in nuetral or park etc..
Do you have a stock tb or aftermarket? I have seen plenty aftermarket ones stick partially open (mostly f.a.s.t.) to cause same problem.
You cruise motor assy by battery could be acting up, could also be a combination of things. Check the slack adjustment clips on cable, I have seen these get unclipped,break, & or slip.
I would just eliminate all that garbage & put a non-cruise throttle cable in it.
p.s. If you have had the iac off of the tb, pull it back off to confirm oring is still present.
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