HELP my 88 is freekin out

[mongo]

Ok Have an 88.It is not my daily driver so for the past couple of weeks it has been sitting in the drive,I go to start it today,ANd holy SH*T its idling at like 2500 -3000 RPMS and won't kick down,When it did ( alittle after about 10 minutes )I put it in drive.Rpms jacked up again and I was almost like spinning my rear tires on the icy street with the brakes on, Dam near took out a parked car,Parked it on the side of the road and walked back home,ANY HELP.I am kind of new to the BRONCO thang, Been wheelin J#*PS ,,,HOPE its simple

 

[WBKrazy]

most likely that's the I.A.C. (idle air control valve) on the side of the throttle body sticking. sometimes you can clean the gunk out and unfreeze them, but sometimes you can't.

 

[BroncoJoe19]

Seems like we are having a run on the same type of problems.

Please review these two threads.

Gentlemen:

Could it be a vacuum leak?

Here is a thread that may also be helpful. Seems he had simimlar problem

http://broncozone.com/forums/index.php?sho...;hl=adjust+idle

I have read other threads that strongly suggest that one does NOT adjust the ***** mentioned in this thread.

Here is another thread that speaks to a high idle

http://broncozone.com/forums/index.php?showtopic=13411

Good luck

joe

 

[mongo]

The TPS does not control Idle speed. That is only caused by either 1: a vacuum leak 2: some knuckle head messed with the stop ***** on the throttle plate. 3: the IAC valve is sticking or 4: the timing is off.

Anyone have picture of what Jersey is talking about I know dums ars question,Just would help a newbee I am new to Broncos

 

[BroncoJoe19]

Anyone have picture of what Jersey is talking about I know dums ars question,Just would help a newbee I am new to Broncos

Here you go mongo

These two pictures were taken while standing at the driver's side fender.

The first pic is a close up.

http://broncozone.com/forums/index.php?act...ost&id=6211

The second pic is an overview so you can find the closeup

http://broncozone.com/forums/index.php?act...ost&id=6210

joe

 

[mongo]

Thanks Broncojoe.I'll have to get out there to figure out what may be a little sticky If the I.A.C seems sticky what can I spray on it ,That won't damage anything ???

 

[mongo]

By the way walked down to the Bronco ,I had to us my battery jumper box.It started fine without the high RPM's about 1500-2000.And was able to drive it back home idled.But when I did park it I gave it alittle gas,RPMS went up ( of course ) ,ANd slowly dropped down to normal,It does sound to me like something is sticky ?? ITs dark have to get the kids to bed I'll check tomarrow,,THANKS EVERYONE FOR ALL YOUR ADVICE

 

[mongo]

Here you go mongo

These two pictures were taken while standing at the driver's side fender.

The first pic is a close up.

http://broncozone.com/forums/index.php?act...ost&id=6211

The second pic is an overview so you can find the closeup

http://broncozone.com/forums/index.php?act...ost&id=6210

joe

HEY where the I.A.C in the first picture,Maybe its not what I think? My chiltons doesn't seem to have the greatest illusration for it.

 

[BroncoJoe19]

http://broncozone.com/forums/index.php?act...ost&id=6211

The IAC has the red wire attached to it.

I don't know what cleaner is safe for it.

 

[mongo]

http://broncozone.com/forums/index.php?act...ost&id=6211The IAC has the red wire attached to it.

I don't know what cleaner is safe for it.

DUDE THANKS SO MUCH

 

[mongo]

Ok 1 - more silly question, (Figure I'm online noone can see me),But my wife I were thinking if it could be a throttle cable or because its so cold in Michigan right now .its sticking .I don't know just seems alittle crazy last night it goes nutz today it seems OK.Just like I said before,When parked and I gas it ,When the RPM's go up they are kind of slow to come down , Is that kind of normal ???Thanks again guys I feel alittle silly with some of these basic questions,I'm more of a body guy then engine .

 

[BroncoJoe19]

Intermittant problems are the worst to figure out.

A little WD-40 on moving parts is usually a good idea.

Once I thought I had a sticking accellerator, and when I looked down, my floor carpet was lying on the gas pedal. So the moral of that story is anything is possible.

 

[mongo]

Thanks a lot .Its cool between this post and the other post on surging,I am collecting alot of great advice...On another post it almost sounded like sometimes its normal that when you jack up the RPMs by accellerating that it may take A SECOUND OR SO TO KICK BACK DOWN...( expecially when parked

Would you suggest that I hit all the moving parts with alittle WD-40 ?

 

[BroncoJoe19]

Thanks a lot .Its cool between this post and the other post on surging,I am collecting alot of great advice...On another post it almost sounded like sometimes its normal that when you jack up the RPMs by accellerating that it may take A SECOUND OR SO TO KICK BACK DOWN...( expecially when parked Would you suggest that I hit all the moving parts with alittle WD-40 ?

Sure a little lubrication wouldn't hurt.

I would still take a look at the IAC. You know how these things go... they break at the worst possible moment.

IT seems that your truck is behaving very differently than your original post. I would bet that the problem will return, so at least now you have an idea of where to look, or things to check.

 

[cj_92Bronco]

use carb cleaner for the IAC