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Re: Here we go again..... #398367
02/13/04 08:00 PM
02/13/04 08:00 PM
MoogVO  Offline
Wheeler
Joined: Oct 2003
Posts: 167
Sanford, NC
Oh lookie... I just noticed that we are neighbors! Lemme know if I can help out with your 'zu!


Tom Moog



1994 Trooper LS
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Re: Here we go again..... #398368
02/13/04 10:29 PM
02/13/04 10:29 PM
A
Anonymous OP
Unregistered

With the idle going up and sticking, I would say the acc cable or throttle body valve is sticking.

Low compression could be many things. What are the compression test numbers?

Re: Here we go again..... #398369
02/14/04 07:12 AM
02/14/04 07:12 AM
A
Anonymous OP
Unregistered

my o2 sensor going bad caused a bad shudder and power loss during acceleration.

Re: Here we go again..... #398370
02/14/04 09:21 AM
02/14/04 09:21 AM
A
Anonymous OP
Unregistered

One thought on the low compression in #3. That's where the leak was right? If it was sucking air into #3 that cylinder would have been running lean. Usually, if the computer detects a lean condition it will enrich the mixture. But if the leak is near the cylinder it won't. In a severe case that could burn the valve. When they did the compression check did they discern whether it was the rings or the valves?

Also, did they make sure the manifold wasn't cracked or warped? If it is leaking again there may have been more to it than just a bad gasket.

If it was running lean enough to burn a valve it would also ruin the sparkplugs. Did you change the plugs already? Check them when you do. Is #3 white and burnt? Do a search on the web or look in any Chilton's manual and you can find pictures of sparkplugs which will show you what a lean burnt one looks like.

One more thought: When you get a vacuum leak one of the common signs is high idle.

If you connect a vacuum gauge to one of the vacuum lines you can tell if you have a burnt valve. You can also tell if you have a leak. If you can get it to idle at the normal speed the vacuum should be between 16 and 22 h. Much below 17 h indicates a leak somewhere. Also, the needle shouldn't jump more than 4 h at idle. If it does, that indicates a burnt valve (I think. It's been a while since I've checked).

One last thought (I promise): The garage should have found out what caused the low compression before they fixed the gasket. That way you could have decided whether you wanted to fix it. Now, if you have to fix the compression problem you will be ripping that same gasket off again. <img src="/forums/images/graemlins/frown.gif" alt="" />

Re: Here we go again..... #398371
02/14/04 09:38 AM
02/14/04 09:38 AM
A
Anonymous OP
Unregistered

I just read through your thread again. One thing that strikes me is you need to call those mechanics who replaced the gasket. The fact that you had a leaking manifold gasket before makes me suspect that you still have a leaking manifold gasket. (I agree that the speedometer is coincidental) Ask them if they checked for cracks or warpage. What was wrong with the plugs? Were they all worn out the same or were there significant differences among them. What caused the low compression? They can easily tell if it's valves or rings. Why are you having these problems now.

I said it before and I'll say it again, I don't think they fixed the problem that caused the gasket to go bad in the first place. At least I think you should make sure they did everything they should have.

Re: Here we go again..... #398372
02/16/04 05:51 PM
02/16/04 05:51 PM
A
Anonymous OP
Unregistered


Hey ya'll,
Well, I went home Friday and sprayed some WD-40 around the intake manifold gasket.
I heard a slight change in the idle, it wasn't REALLY apparent, but I could hear it.

Under the plastic engine housing, where the cruise control cable is, there is another cable that runs into the firewall behind the dash - what cable is that?
When I pull on it there's some slack that doesn't feel normal.

Also, I love my dealer's repair manual, but for those of us who have never really worked on trucks before, it's hard to find clear instructions on how to do things and where to find them.
I looked and looked, all weekend, for an indication as to where the TPS is. Couldn't find a darn thing on it anywhere.

Anybody wanna clue me in as to where I can find it?

I did call my mechanic on Friday, but I didn't ask him any of the questions you all posed. I will ask them when I call back today - I didn't take truck in last night due to snow storm.
When I find out what they say, I'll repost.

Thanks again for all the help and advice!!

Ashley

Re: Here we go again..... #398373
02/16/04 09:19 PM
02/16/04 09:19 PM
rubo  Offline
Body Damage is Cool
Joined: May 2002
Posts: 1,863
L A, CA
AFAIK TPS is suppose to be where the throtle cable is (around the area where the air intake connects to IM).

Hope you will resolve this soon.


"If i can't crawl over it, i'll fly over it"
rubo

'96 Amigo 4x4, 3.2L V6, 4L30E, D44 rear, SOA, 1" BL, undergoing surgery.
'00 Rodeo LS 4x4, 3.2L V6, OME 919 Springs, front cranked to match,1" BL, 265/70x16 Scorion A/T's.
Re: Here we go again..... #398374
02/17/04 07:27 PM
02/17/04 07:27 PM
M
Michelle  Offline
Getting the Wheeling Fever
Joined: Feb 2004
Posts: 28
Alberta Canada
Hey Ashley, I got my 1999 Rodeo fixed. I was having a similar problem with the #3 misfire, running lean codes etc. I had replaced the plugs, mas sensor, air temp sensor and still had the same problem. Turns out mine was the intake gasket at the #3 cylinder. Your mechanic could have over tightened the manifold and cracked the gasket again. According to spec's they are only supposed to be tightened to 18 ft lbs. which isnt much at all. I dont know if some of the problems you are having were after the mechanics fixed the intake gaskets-if they are could be a small chance that they didnt put it back together correctly?

Re: Here we go again..... [Re: Michelle] #398375
02/17/04 09:45 PM
02/17/04 09:45 PM
A
Anonymous OP
Unregistered

Hey Michelle,

That's what I'm thinking.
I'm going to take the truck as soon as this dang snow stops and have them recheck the IMG.
I'm pretty sure that something happened when they put the gasket back on. If it blows again, at least I'll know there is something else causing the problem.

I'm going to have them check the manifold THOROUGHLY for any cracks or warpage.

I'll let you guys know how that works out.

Thanks again to all for the AMAZING assistance and response.
I hate going to the mechanic without SOME idea of what's going on with my truck.

L8R - Ashley

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