Page 1 of 1
2002 Pontiac Sunfire - 2.2L Surge With A/C On
Posted: Tue Jul 24, 2012 11:30 am
by RODNEYY
2002 PONTIAC SUNFIRE 2.2L
WHEN A/C IS ON AND SLOWLY ACCELERATE, THE VEHICLE SURGES BADLY. GIVE IT MORE GAS AND IT GOES AWAY. NO CODES PRESENT, HIGH AND LOW PRESSURES WITHIN NORM.
ANY IDEAS?
Re: 02 PONTIAC SUNFIRE
Posted: Tue Jul 24, 2012 11:37 am
by brianp87
Whats the fuel pressure reading during the surge?
Re: 02 PONTIAC SUNFIRE
Posted: Tue Jul 24, 2012 12:28 pm
by liljoe
Wonder if the knock sensor could be picking up a compressor or bracket noise and retarding the timing?
Re: 02 PONTIAC SUNFIRE
Posted: Tue Jul 24, 2012 12:40 pm
by brianp87
The extra load from the a/c sometimes magnifies another issue. Hard to say at this point givin the info we got its all
a guess.
Re: 2002 Pontiac Sunfire - 2.2L Surge With A/C On
Posted: Wed Jul 25, 2012 1:40 am
by steven kiser
The surge may in fact be a stumble recovery or the compressor is overworking or it may be simply overcharged. It's a stretch but if it's overcharged and fighting because of pressure when it cycles off the vehicle may surge. Another issue may be a lazy I.A.C.. Just in case it may help in investigating which 2.2 it is.
Re: 2002 Pontiac Sunfire - 2.2L Surge With A/C On
Posted: Fri Aug 03, 2012 11:00 am
by 92zman
i would cut for a miss that is not that bad untill the ac is on
Re: 2002 Pontiac Sunfire - 2.2L Surge With A/C On
Posted: Sat Aug 04, 2012 6:30 am
by steven kiser
92zman wrote:i would cut for a miss that is not that bad untill the ac is on
possibly but no mention of a misfire or stumble during acceleration.............
Re: 2002 Pontiac Sunfire - 2.2L Surge With A/C On
Posted: Thu Aug 09, 2012 8:19 am
by 92zman
Was thinking then the miss was not bad enough to show up till under a really heavy load.. something elas is the coil being bad. Have had a a/c coil go bad and be making the coumputer to off the wall stuff.