Question about 1991 Pontiac Grand Prix
Ok, so I have a 91 Pontiac Grand Prix GTP 3.4 V6. The check engine light comes on. I used the OBD1 to check it and it spits out the code 32 which is the EGR system code. I replaced the EGR and gasket. About two weeks later, the engine light came on again with the same code. The car idles fine, runs a little loud, my main concern is the lack of power and erratic surges it has while it accelerates. It really struggles when it is between 2500 and 3500 RPM's. Once it passes 3500 RPM's, however, it really gets going. There IS a hose that isnt attached to anything and i cant find anywhere to plug it in. I need some advise. Any advise is welcome.
You said it struggles between 2500 and 3000 RPM. checking the hose for vaccuum at idle won't work. Rev the engine to the problem RPMs and check. That will tell you about vaccuum. As for where it goes, it won't go in the same palce as the brake booster. There will be another connector. If the re is a T there now, it sounds like someone else may have changed things around.
Posted on Sep 14, 2009
I would check to see if that hose has any vacuum by placing your finger on the end to feel for vacuum.also,where is the hose located? behind the engine?? there are vacuum lines/hoses that are involved in controlling the egr valve,not just the egr valve itself. follow the vacuum line back from the egr to see where it goes.make sure all those plastic lines/hoses are not cracked or disconnected. also there should be a white sticker/decal under the hood probably near the radiator or by one of the strut towers that will give you info on spark plug gaps,VACUUM LINE POSITIONS,ETC. that should tell u where the disconnected hose goes-that MIGHT be your whole problem.let me know if this helps.
Posted on Sep 03, 2009
Your loose hose from the EGR might plug into the back side of the throttle body...I'm not sure of the 3.4 liter setup.
Posted on Jun 23, 2009
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Posted on Jan 02, 2017
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