420A 2gNT turning on AC causes engine to lose power and stutter

[griser]

Maybe you guys can help me. I have a 2g 420a and everytime I turn on the AC the car loses quit a bit of power. When I accelerate it stutters a bit at lower rpm but improves at higher rpms.
Can anyone help please?

 

[spike2gdsm]

I also have the 420a. The a/c will make u lose a little bit of power do to it running off the crank pulley. As far as it stuttering at lower rpm. Im not of much help there bud. I dont want to feed u wrong info. But i would check the belt. And U could possibly have bearings going bad in the compressor pulley. But dont quote me there. I did an a/c delete to my 97gs so thats why i dont want to lead u on to a quick fix.

Sorry wish i could be of more help.

 

[griser]

I also have the 420a. The a/c will make u lose a little bit of power do to it running off the crank pulley. As far as it stuttering at lower rpm. Im not of much help there bud. I dont want to feed u wrong info. But i would check the belt. And U could possibly have bearings going bad in the compressor pulley. But dont quote me there. I did an a/c delete to my 97gs so thats why i dont want to lead u on to a quick fix.

Sorry wish i could be of more help.

Thanks mate
I live in Louisiana so I def dont want to delete the AC. Lol

 

[spike2gdsm]

Not a problem bud. I lived in mississippi for 10 years. I do understand the heat!!

 

[stevoharris420]

What belt did you use when you deleted it

 

[Dericsh]

What belt did you use when you deleted it

I doubt you get an answer from members that are 7 years inactive but maybe this will help.

2GNT.com - Accessory_Belt_Sizes

www.2gnt.com

 

[stevoharris420]

Thanks so much

 

[CKOPOCT]

The problem would seem to be that you have either excessing draw on the engine with the a/c engaged (bad compressor bearings, belt is too tight, compressor having to work too hard, bad electric fans drawing more power than a weak alternator can handle, etc.) or you have an engine that isn't producing sufficient power.

A lot of different things can give you this issue...

When you are at idle, does the engine rpm kick up when the a/c engages?

How is your gas mileage? Are you getting close to what you should or does your gas mileage suck? Some things to do to help diagnose this:
> listen to the engine at idle with the ac on. Listen for bearing whine, power cut, or other things that seem off.
> remove ac belt and spin the ac pulley by hand to feel for a bad bearing
> check the alternator's output to ensure it is giving you enough juice
> check spark plugs for burn pattern and condition and to compare across the cylinders
> check compression if you think there is a power production problem (doubt this)

Not a diagnosis of what it could be, but this should begin to give you some answers...

 

[waltah]

A simplified version of CK0P0CT's list plus one:

1 When running without A/C does the car have normal power? If not, then even a normal A/C load may be a drag. AND there could be a problem in the A/C pulley or compressor causing a drag even when A/C is off.

2. When idling after warmup with no other accessories on, you turn lights on high beam is there no more than a barely perceptible and momentary drop of engine RPM? If a second or more or if idle is definitely slower then the Idle Speed Control is not working properly: This will cause various problems (stalling when starting on a cold day, might stall at stop signs ...) and will definitely lead to struggling when the A/C is on.

3. How long have you had the car? Has A/C been serviced since you've had it? By a professional or other skilled A/C person? (An overcharged system or one with too much oil will put an excessive load on the engine without producing more cooling, and both are easy to do on these systems.)

Answers to these questions should point you toward the area of the problem.