surging problems
Thread Starter
Heel & Toe
Joined: Feb 2004
Posts: 20
Likes: 0
From: New York NY
surging problems
I have a surging problem when holding at a constant speed and or RPM, also on deceleration. feels like the car is bucking. stange part is there is plenty of power when accelerating. Have had this to 2 shops + GM tech , and no results.
Melting Slicks
Joined: Apr 2002
Posts: 3,268
Likes: 2
From: Minnesota in the summer, Las Vegas in the winter
Re: surging problems (timmytcc)
I haven't a clue, but welcome to the forum........these guys know lots of stuff and, if they can, they will help you................
:seeya
:seeya
Thread Starter
Heel & Toe
Joined: Feb 2004
Posts: 20
Likes: 0
From: New York NY
Re: surging problems (rick lambert)
dropped off car today to vette specialists, say it's most likely not fuel related, because it surges on deceleration, you said the same thing he did about a possible clogged cat. hope thats it.
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Re: surging problems (rick lambert)
Have you checked your fuel filter? Cats? Cats can really give some wierd reactions if they are getting clogged! Good Luck and post your find! :seeya
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: surging problems (vinnies87)
have you done any ECM/PCM reprogramming? What grade of fuel are you running? I Also check your fuel injectors.. I injector stuck shut would cause cyl. to run lean.. and surge.. DANGER DANGER DANGER! Also, Check for operation of the O2 sensors.. if you have a scanner log some data and we'll check it out for you.. if not but a voltmeter on the 02 wire while the engine is idling (warm idle in closed loop) and the readins should vary pretty rapidly.. between 100mv-800mv 450-500mv is perfect stoich..less is lean more is rich.. however you must look at the net avg. of the swing - not just instintanious readings. could also be a fuel pump or clogged fuel filter.. malfunctioning MAP, IAC or evaporator purge system.. could also be bad spark plug, wire or coil.. theres a lot to look for.. start eliminating possiblitues..
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Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: surging problems (BluByU)
:iagree: Just to add, I think BluByU means "canister purge system" not "evaporator purge system". correct.. :grouphug:
