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clarkboyz
Novice
May 17, 2009, 6:04 AM
Post #1 of 13
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I have a 1989 GMC Vandura conversion van I just bought,as soon as it warms up it stalls at stops,it runs great while driving and in neutral and park,please let me know if you have any idea what this is thanks ken
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Loren Champlain Sr
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May 17, 2009, 3:40 PM
Post #2 of 13
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Re: stalls in drive
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Ken; There are a multi-tude of possiblities; Does it start right up again after stalling? Could be any one of many reasons. CTS, vacuum leak, IAC, module, ect.
Loren
SW Washington
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clarkboyz
Novice
May 17, 2009, 4:31 PM
Post #3 of 13
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Re: stalls in drive
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yes it does starts right up every time,when you come to a stop sign you can see the oil pressure gage droping when it idles down then it stalls,it took all the money i had to buy the van where do i start now,people telling me to buy throttle position sensor thats 41 dollars and what if there wrong please let me know if you could thanks
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Loren Champlain Sr
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May 17, 2009, 4:43 PM
Post #4 of 13
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Re: stalls in drive
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The TPS will rarely cause a stall, but a hesitation. But, it's possible. The oil pressure reading is probalby correct. As engine rpm drops, the oil pressure will, too. Could be as simple as needing an injection cleaning. The IAC (idle air control) is an electrically operated solenoid that opens and closes to control idle speed. They get dirty/sticky over time.
GM IACs rarely need to be replaced, just cleaned. Of course, there are a multitude of other possiblilities, but that is the most common.
Loren
SW Washington
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clarkboyz
Novice
May 18, 2009, 2:35 AM
Post #5 of 13
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Re: stalls in drive
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Im sorry you seem to know what your talking about,but I do not how do you go about cleanig the IAC or is that something for the shop please let me know thanks for you help and time,Im a single father with three small kids and this stalling is getting to be dangerous people are nuts out there lol
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Loren Champlain Sr
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May 18, 2009, 3:19 PM
Post #6 of 13
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Re: stalls in drive
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Ken; Taking care of three small boys, by yourself, is a heck of lot more technical and important than what I do. My hat is off to you!
As far as cleaning the IAC, it really isn't that difficult. Need to know which engine you have. Throttle body or multi-port fuel injection? Being a van, it isn't going to be very easy as you'll have to remove the dog-house if it's a TBI system, which I'm guessing. Let me know for sure. I'll try and pull up a pic to show you what we're talking about. On the other hand, if you can afford it, a fuel injection cleaning will help fuel economy and performance, while cleaning the IAC at the same time. Generally, around $100.00. (Ask for Motor Vac FI service). But, if you want to attempt the IAC, let me know.
Loren
SW Washington
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clarkboyz
Novice
May 19, 2009, 2:05 AM
Post #7 of 13
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Re: stalls in drive
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ok they say its not a throttle body and to make sure i called auto parts store and they said they dont have a throttle body for 89 it stopped at 88,the motors a 350,and yes lets give this a try 100 dollars buys three pair sneakers lol,any help you give me would be great,i also went on e-bay and bought a chiltons manual for 4.00 figured couldnt hurt,please let me know what to do and pics would be real nice lol,oh and thanks for taking the time to help me ken
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Loren Champlain Sr
Veteran
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May 19, 2009, 1:39 PM
Post #8 of 13
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Re: stalls in drive
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I still haven't figured out how to post a pic, here. Hmmmmm. Attached is a blown up view of the TBI unit that, according to Mitchell, your van has, as opposed to MPI. If you notice at the bottom of the pic, you'll see the IAC.
This unscrews (counter-clockwise) from the TBI. With the engine off, of course, disconnect the electrical connector from the IAC, remove it, and clean it with carb/choke spray. Also, clean the TBI port where you removed the IAC. Allow the spray to dry before putting everything back together. You can also clean the insides of the TBI while you are there. Depending on how much spray you use, it may be a bit slow in starting. Just crank it over until it starts. Don't give it any throttle. Hope this helps.
If my 'book' is wrong, and it does have MPI, it will have an IAC, also...Do the same thing. If it's MPI, you may be able to access it through the hood, but if it's TBI, you'll have to remove the doghouse, air cleaner assy, ect. (Be sure that the air cleaner is installed prior to starting, in case of backfire)
Loren
SW Washington
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clarkboyz
Novice
May 19, 2009, 4:07 PM
Post #9 of 13
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Re: stalls in drive
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thank you very much,this will be a big help,ill let you know how i make out thanks again ken
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Loren Champlain Sr
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May 19, 2009, 4:17 PM
Post #10 of 13
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Re: stalls in drive
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Good luck, Ken; If you can handle three boys, you can do anything!
Loren
SW Washington
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Double J
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May 19, 2009, 7:49 PM
Post #11 of 13
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Re: stalls in drive
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Loren Champlain Sr
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May 20, 2009, 3:18 PM
Post #12 of 13
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Re: stalls in drive
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Hey, Jim! Yours is bigger than mine. 
Loren
SW Washington
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Double J
Veteran
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May 20, 2009, 6:35 PM
Post #13 of 13
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Re: stalls in drive
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Loren,
That was your Pic,I just posted it for you!
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