upper intake gasket

[cessna]

Hey just looking for some help with a problem on a 93 z-34- 3.4 had a high idle at startup gave me a code for IAC valve replaced the IAC valve and now it seems that IAC cant find idle, when cold ,did idle relearn a couple of times to no avail. car seems to idle fine when warmed up,im thinking that maybe the upper intake gaskets are leaking, tried spraying around gasket where I could get to it that is, with no change in idle ...any help out there .................

[jman093]

On an LQ1 3.4, the lower intake is a much more likely culprit than the upper intake.

[RobertISaar]

not that it's a long process to get there, but if you have the UIM off, you might as well pull the LIM as well.

[Psych0matt]

sounds identical to my issue, which ended up being LIM gaskets. Just do those too and save the trouble

[94 olds vert]

X2 on the LIM.

 

I just did mine and it's really easy to do.

[cessna]

well it sounds as tho upper and lower intake problems ,so its easy to do ? any step by step help with this ,,,,,,,,,,,thanks for all the info guys

[94 olds vert]

I referred to this thread when I did my tear down.

http://www.w-body.com/showthread.php/37752-how-to-replace-a-lower-intake-gasket-on-a-3-4-dohc

[cessna]

Thanks 94 olds vert ,thats a big help for this project have to order some gaskets and get some rtv ready ......thanks to all who helped with this question.......

[rich_e777]

Thanks 94 olds vert ,thats a big help for this project have to order some gaskets and get some rtv ready ......thanks to all who helped with this question.......

Permatex makes some good stuff that doesn't harden up that works way better than RTV. If you are going in you might want to hit the distributor plug with some of this while your there. Its a really common place to start leaking oil at and a real simple fix.

[94 olds vert]

I slipped a new O ring on my oil pump and a paper gasket then coated it with RTV. It's leak free now.

[cessna]

great advice guys thankyou .................any and all info, Im all ears for this project...thanks again

[94 olds vert]

I advise you took at this page. Especiialy at Crazy K's post. That is the way I did mine.

 

http://www.w-body.com/showthread.php/8442-O-Ring-%28Oil-Pump-Drive-Seal%29-Fix-%28Pictures%29/page3

 

Take a look at this page as well for part numbers for the O ring oil pump and the paper gasket.

 

http://www.w-body.com/showthread.php/75664-3-1-L-1992-Lumina-sedan-oil-leak-crack-in-manifold-or-engine/page2

 

The heater hose connector that goes into the LIM likes to go bad. I know mine was. Might be a good time to replace it.

 

Take a look at my CS project thread. I have picture from when I did my tear down. It maybe helpful to you.

 

http://www.w-body.com/showthread.php/42412-94-olds-vert-neverending-project-thread/page48

 

If you need to know anything else. Just ask. I tried to cover everything for you. :

Edited April 30, 2013 by 94 olds vert

[cessna]

quick question someone was telling me that if the intake gaskets were bad I would have water in the oil or oil in the water I have none of those issues just high idle about 2000 rpm could there be another problem here .................

[94 olds vert]

I didn't have coolant in my oil when my LIM went.

[cessna]

hey 94 olds vert did you have the high idle that im encountering from the intake gasket

[94 olds vert]

It was high not as high as yours. It also jumped around. It was a bit of a lope now it idles perfectly.

[cessna]

some people say it helped some say it did'nt I just want to make sure im not missing something before I tear it down for intakes it only has 72,000 miles on it I was leaning toward maybe I got a bad IAC valve ......O there is something else I noticed on the back of the engine there is a sensor or valve of some sort that has 2 vacuum lines going to it and a 2 wire connector on it the connector is missing just bare wires there any idea what that might be?

 

also this is the only car I have right now thats why im a little hesitant about this intake gasket teardown but if thats what is needed then I have no choice just want to be sure .....

Edited April 30, 2013 by cessna

[AL]

The coolant mixing with oil because of LIMs is more often seen on the 3100 and 3400, not as much on the 3.4 DOHC that you have

[cessna]

Hey Al would you agree that intake gaskets could be the cause of high idle at startup when cold ,no mixing of fluids and no lose of fluids just high idle untill its warmed up a little

[Crazy K]

no coolant leak, but a intake leak on a 3.4 means unmetered air is getting into the engine. I had this occur on my 95 cutlass 3.4.

[RobertISaar]

unmetered air is a serious problem on MAF cars, with speed-density it's not so bad. however, the idle fueling for the 91-93 3.4s is done partially via alpha-n, which is also susceptible to vacuum leak issues.

[cessna]

robertisaar....which in turn means ? sensors ?

Edited May 1, 2013 by cessna

[cessna]

Hey anyone out there with some ideas on this problem I start it up and it goes right to 3k and very slowly drops to about 2k I replaced IAC valve tps sensor and map sensor to no avail I just not thinking that an intake would cause this problem ......any help with this or a good reaso as to why it should be an intake gasket .....thanks for any input ...

[Garrett Powered]

there is air coming in somewhere. whether it be the intake, number of IAC steps, TB, hole somewhere in the intake or vacuum.

[cessna]

Im not sure what you mean by number of IAC steps ?? care to elaborate on that ....thanks