hey gang! ive been racking my brain trying to figure this out.
The vehicle...1995 lumina van w/3.1
the problems...drives fine, idles terrible,surges on take off and stalls.
codes im getting..22,32,33,34.
what ive done so far...replaced the TPS sensor,egr valve, and map sensor.
still cannot clear up this problem..i pull the battery cables to clear the codes which i checked to make sure they were erased then within 5 miles of test drive the engine light comes on and again i get 32 and 34 codes. so i went ahead and picked up another map sensor thinking maybe the 1st one was DOA, no change. this is an idle problem, after the van gets moving it runs smooth. any info to help me out is much appreciated!!

 

check egr

 

the egr and TPS are the first things i replaced...after those codes were taken care of i got the map sensor code...replaced that(twice) and still get the map sensor codes and still have the original problem. trying to convince my father to 86 this pos isnt working either lol

 

Anyone? Anyone?? no real hurry...but I will need to bring it in on tuesday to have it repaired if I cannot get to the bottom of this issue.

 

Hi ShawnIII,

Welcome to the Chevy Forums.

Two things come to mind. A vacuum leak, check all the hoses leading off the intake manifold(possibly distributor vacuum?) VERY carefully.

AND the great imitator: Corroded battery cables. At 16 years old, I would guess if you changed your cables and engine- to- firewall ground-strap, your short might sing a new tune.

 

Check to see if there is actually vac to the map sensor.

 

awesome! thanks for the replies!! im going to check all these possibilities first thing in the AM. thanks again!

 

tried all suggestions even replaced the cap/rotor and the EGR solenoid. no change...keep getting a 32 code and idles like $hat and dies. bringing it to a friend who is a master mechanic. dont like bringing my problems to other people but i feel ive done all i can do. thanks for the help though guys!

 

We're here to try to help as many as we can with diagnosis and dialogue.

Stay tuned, maybe next time you'll see somebody having a problem you solved a while back.

Please post when you've figured out the problem. Many others could benefit from your experience. Thanks.

 

well got to the bottom of this today. as i found out the codes given do not always mean that the part it is refering to is bad. this was a fuel problem. fuel filter wasnt plugged but damn near, fuel regulator diaphram was shot, and TBI screens needed cleaning so the whole throttle body got cleaned up. and to top it off i replace the fuel pump just because. runs better then ever! thanks to the suggestions I recieved from here the vacuum hoses are all new along with the ground cables two less future problems to deal with! thanks gang!