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Intake manifold help

G

gr8scott72

New member
I need some help. I just replaced the upper intake manifold, lower intake manifold gasket, and both valve cover gaskets. Got it all back together and cranked her up. She started then stumbled and died. It sounds like it might be a vacuum leak. I replaced the lines to the fuel pressure regulator, the throttle body, and whatever that fuel line that sits just in front of the intake manifold as the connectors had all cracked when I took them off.

What else am I missing?

Oh, it's a 2000 Grand Prix GT N/A
 


will it stay running if you work the gas pedal?

re check all the vac lines are back on and in place, and for broken T's or ends.
 
scottydoggs said:
will it stay running if you work the gas pedal?

re check all the vac lines are back on and in place, and for broken T's or ends.
Click to expand...

I took the UIM back off and took the throttle body checking to see if I missed anything. Didn't see anything obvious. Put it all back together and cranked it up. It will now idle although it does so with a surge up and down. There is also a dead spot in the gas pedal just revving it at idle. It also is leaking coolant so I guess I'll be taking the lower manifold off again and checking it again. I couldn't tell where the leak was coming from.
 


Did you replace the rectangular gasket on the driver side of the intake that is kinda hidden by the crossover pipe? That leaked the first time I did an intake, forgot to replace it.
 


BillBoost37 said:
Where are you leaking coolant from? The gasket 2004 is talking about is directly under the TB on the LIM.
Click to expand...

I used the dorman upper intake manifold and it didn't have any square gaskets in it. I'll take a look again when I rip it back apart again.

Don't really know where it's leaking from. Can only see it dripping under the car but haven't been able to pinpoint it yet.
 
That gasket is not a likely candidate to leak.

Well...if you want some help figuring it out.. give us more info. Passenger side, driverside...front, bad... on the trans..on the lim.. under your armpit. We can tell you what it likely is ...if you give us a general idea.
 
BillBoost37 said:
That gasket is not a likely candidate to leak.

Well...if you want some help figuring it out.. give us more info. Passenger side, driverside...front, bad... on the trans..on the lim.. under your armpit. We can tell you what it likely is ...if you give us a general idea.
Click to expand...

Only thing I could see was water coming off the bottom of the car under the area of the belt.
 


Thanks for all the help. Hopefully I'll have time in the next few days to tear back into it and I'm sure I'll have more questions.
 
So, I took the upper back off and the lower. The coolant elbow in the lower manifold is stuck. It's like it went too far in. That's probably where the leak was.

BUT, I have bigger problems than that too. I noticed a few drops of water in the top of the lower manifold. Pulled the dip stick and sure enough, milky oil. I don't know where it's coming from.I thought I put it all together correctly. Wish someone was close to me to give me a hand.

I might be in over my head here.
 
When you pulled the lower off....did you tilt it at all? That can allow coolant to go into the motor. Which..would mean a couple oil changes. Otherwise, I'd think you maybe have the LIM gaskets out of place etc. Did you take any pics when you did the work?
 
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