2002 sudden surge problems
January 19th, 2011, 2:57 PM
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2002 sudden surge problems
Hi Everyone,
Newbie here and thanks for having me. I got a problem with my daughters 02 cavalier, 2.2 engine . All of a sudden the engine is surging (as if you are hitting the gas pedal) when coming to a stop. But whats really weird is that it only does it with the heater in the on position(any position on the blower). It does it no matter where i put the heater selector (a/c,heat,floor,defrost,etc) When i turn it off it totally stops surging. The a/c never worked in this car but the compresser turns freely. (It had a leak in it and it was never fixed) Ive heard of a/c pressure switches acting up but w/o a/c working can this still affect me? This is a strange first post but i had to throw it out there. Lmao... Any help would be appreciated,cuz i am lost on this one. BTW, i cleaned the throttle body and idle air control valve. Put new plugs,wires, gas and air filters in too!
Newbie here and thanks for having me. I got a problem with my daughters 02 cavalier, 2.2 engine . All of a sudden the engine is surging (as if you are hitting the gas pedal) when coming to a stop. But whats really weird is that it only does it with the heater in the on position(any position on the blower). It does it no matter where i put the heater selector (a/c,heat,floor,defrost,etc) When i turn it off it totally stops surging. The a/c never worked in this car but the compresser turns freely. (It had a leak in it and it was never fixed) Ive heard of a/c pressure switches acting up but w/o a/c working can this still affect me? This is a strange first post but i had to throw it out there. Lmao... Any help would be appreciated,cuz i am lost on this one. BTW, i cleaned the throttle body and idle air control valve. Put new plugs,wires, gas and air filters in too!
Last edited by jimbo141; January 19th, 2011 at 3:27 PM.
January 20th, 2011, 6:25 PM
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Ok,I talked to three different people last nite and all three said possible vacuum leak b/c it involves the heater selector switch. Is this possible? I didnt think the heater selector switches still use vacuum at all. STUMPED.......
January 20th, 2011, 7:02 PM
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Some cars definitely have vacuum lines connected to the heater switch. Whether Cavalier is one of these - I do not know.
Another explanation is your car thinks A/C compressor kicks in and tries to compensate for increased load. Since you say A/C is not working I'd try to disable it fully, starting with removing the fuse.
Another explanation is your car thinks A/C compressor kicks in and tries to compensate for increased load. Since you say A/C is not working I'd try to disable it fully, starting with removing the fuse.
January 20th, 2011, 7:42 PM
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Thank you, I am a truck driver on the road now. I will try that this weekend when i get home. I also plan on disconnecting the a/c pressure switch that seems to give lots of problems.
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