Put truck in drive shuts off?? Help
- Thread starter BRASCO
- Start date
MIXEDBREED
New member
Re: Put truck in drive shuts off?? Help
I think the IAC Valve is up in the TB but not sure, anyone have a write up of how to replace or clean it out?
I think the IAC Valve is up in the TB but not sure, anyone have a write up of how to replace or clean it out?
SYO237
SyTy Registry
Re: Put truck in drive shuts off?? Help
Its located on the bottom of the TB. You can see it if you lean over and look beneath the TPS, its directly underneath it. It has a 4 prong pigtail that plugs into the end of it.
It screws in. Its a rather large size. I have sockets that are large enough, but you can use a crescent wrench. It's a tight squeeze in there, so fair warning. You can take brake cleaner and try to clean it since it gets gunked up with carbon buildup. DO NOT try to move the plunger and screw with the spring. You can damage it that way if it still is working. To replace it, just screw the new one back in, plug in the pigtail.
If your feeling ambitious, you can take off the IC resovior and entire TB to get it off. Might as well clean out the TB if your going to do that though.
Its located on the bottom of the TB. You can see it if you lean over and look beneath the TPS, its directly underneath it. It has a 4 prong pigtail that plugs into the end of it.
It screws in. Its a rather large size. I have sockets that are large enough, but you can use a crescent wrench. It's a tight squeeze in there, so fair warning. You can take brake cleaner and try to clean it since it gets gunked up with carbon buildup. DO NOT try to move the plunger and screw with the spring. You can damage it that way if it still is working. To replace it, just screw the new one back in, plug in the pigtail.
If your feeling ambitious, you can take off the IC resovior and entire TB to get it off. Might as well clean out the TB if your going to do that though.
powercat6
Active member
Re: Put truck in drive shuts off?? Help
http://www.syty.net/forums/showthread.php?t=47424&highlight=iac
http://www.syty.net/forums/showthread.php?t=47424&highlight=iac
MIXEDBREED
New member
powercat6
Active member
Re: Put truck in drive shuts off?? Help
If you have Firefox try that. For me the images appear on Firefox, but not Internet Explorer.
If you have Firefox try that. For me the images appear on Firefox, but not Internet Explorer.
Re: Put truck in drive shuts off?? Help
Re seat your chip in the computer. What is your timing with black/tan wire disconnected? It should be 0 degrees. Are you getting any codes? What chip is in there, is it factory?
__________________
The chip is set correctly and i have a couple different ones including stock and a older kenn bell stk injecter chip. Base timing is zero, and with the wire conneted there are no codes.
Have access to a scan tool? Or DataMaster, etc.?
Is the Park/neutral switch input 'correct'? Ie, is the ECM getting the signal that it is in P or N?
What are the IAC counts? If "zero", the ECM is trying to overcome a vacuum leak, mis-adjusted throttle idle-stop, or could be related to P/N switch above.
My guess is you don't have a scan tool. So try this:
With the engine not running, back out the idle adjustment screw while watching the linkage. Turn it out until the screw is 'just' no longer touching the linkage. Turn it back in 1/4 turn. See how it does.
I dont have a scan tool to check any of the counts, what do u mean park/neutral switch input correct? I have a plug still on the tb for that idle screw should i remove it an adjust the screw if it hasnt been messed with yet?
Thanks Donny :tup:
Re seat your chip in the computer. What is your timing with black/tan wire disconnected? It should be 0 degrees. Are you getting any codes? What chip is in there, is it factory?
__________________
The chip is set correctly and i have a couple different ones including stock and a older kenn bell stk injecter chip. Base timing is zero, and with the wire conneted there are no codes.
Have access to a scan tool? Or DataMaster, etc.?
Is the Park/neutral switch input 'correct'? Ie, is the ECM getting the signal that it is in P or N?
What are the IAC counts? If "zero", the ECM is trying to overcome a vacuum leak, mis-adjusted throttle idle-stop, or could be related to P/N switch above.
My guess is you don't have a scan tool. So try this:
With the engine not running, back out the idle adjustment screw while watching the linkage. Turn it out until the screw is 'just' no longer touching the linkage. Turn it back in 1/4 turn. See how it does.
I dont have a scan tool to check any of the counts, what do u mean park/neutral switch input correct? I have a plug still on the tb for that idle screw should i remove it an adjust the screw if it hasnt been messed with yet?
Thanks Donny :tup:
SY2455
70's Veteran
Re: Put truck in drive shuts off?? Help
:tup: NEVER / EVER use this chip underline above, unless you want to rebuild your motor .
:tup: NEVER / EVER use this chip underline above, unless you want to rebuild your motor .
Re: Put truck in drive shuts off?? Help
I Bought the truck at the begining of the summer and it would not run right just as it does today, the guy i bought it from said it would only run ok with the black and tan wire disconnected. So i thought it was a timing issue at first but wasnt, then vacuum, then ign module, then cap and rotor, iac , temp sensor, so on and so forth. Did a compression check and leak down and found that # 4 and #6 cylinder was shot. Head gasket was shot so i took it all apart got the heads decked bought new cometics from Mike at rpm and put it all back together same thing. It had two seperate problems one being the head gasket was bad cause after talking to the guy again he said he blew the drivers side gasket, and after talkn to him for a bit that was all he changed. I thought i might be a ecu since it wasnt putting a code up so i borrowed one from board member Denny(thanks bro) but i dont think its the ecu. So after months of checking grounds vacuum leak and other odd and ends i think this might be above my pay grade and im not ashamed to say it.
??? Donny :rant:
I Bought the truck at the begining of the summer and it would not run right just as it does today, the guy i bought it from said it would only run ok with the black and tan wire disconnected. So i thought it was a timing issue at first but wasnt, then vacuum, then ign module, then cap and rotor, iac , temp sensor, so on and so forth. Did a compression check and leak down and found that # 4 and #6 cylinder was shot. Head gasket was shot so i took it all apart got the heads decked bought new cometics from Mike at rpm and put it all back together same thing. It had two seperate problems one being the head gasket was bad cause after talking to the guy again he said he blew the drivers side gasket, and after talkn to him for a bit that was all he changed. I thought i might be a ecu since it wasnt putting a code up so i borrowed one from board member Denny(thanks bro) but i dont think its the ecu. So after months of checking grounds vacuum leak and other odd and ends i think this might be above my pay grade and im not ashamed to say it.
??? Donny :rant:
SYO237
SyTy Registry
Re: Put truck in drive shuts off?? Help
Dont know what I would recommend as far as aftermarket brand, but if Denny has and is willing to let you try it out, by all means.
Dont know what I would recommend as far as aftermarket brand, but if Denny has and is willing to let you try it out, by all means.
powercat6
Active member
Re: Put truck in drive shuts off?? Help
FYI
http://www.sytyarchives.com/howto/viewarticle.php?article_name=ignition_tune_up.php&dir=engine
FYI
http://www.sytyarchives.com/howto/viewarticle.php?article_name=ignition_tune_up.php&dir=engine
dgoodhue
BuSTeD 4.3
Re: Put truck in drive shuts off?? Help
If you engine has a larger cam, the problem might be the tune. The KB and stock chips are intended for stock cams.
If you engine has a larger cam, the problem might be the tune. The KB and stock chips are intended for stock cams.