Surging with A/C on
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Senior User
Joined: May 2003
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Surging with A/C on
I have a 1994 Olds Regency '98 with a 3.8 liter engine. It is a great running car, but when I turn on the a/c sometimes I can detect a slight surge every few seconds. Under acceleration it is much worse, and it feels like you are pressing the gas on and off, but at highway speeds you can almost hear it more than feel it. Does this have anything to do with a bad I.A.C. motor, or is it a switch that is DIRECTLY related to the A/C?
If this should be somewhere else please let me know.
Thanks
If this should be somewhere else please let me know.
Thanks
Senior User
Joined: Dec 2003
Posts: 354
Likes: 1
From: Memphis, TN USA
AC creates more load on the engine.
Check your R-134a charge level and charge it up to the right level. You can get the recharge it from Walmart, etc.
Just make sure that the spark plug wires are not touching or rubbing in the engine block or exhaust manifold.
Check your R-134a charge level and charge it up to the right level. You can get the recharge it from Walmart, etc.
Just make sure that the spark plug wires are not touching or rubbing in the engine block or exhaust manifold.
Thread Starter
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Senior User
Joined: May 2003
Posts: 100
Likes: 0
I definitely know that AC creates the load on the engine, but I've had about 10 cars and none of them did the surge every second or so thing that this one is doing. Yes, the RPM would slightly drop and you could notice the load increase on the engine, but going down the interstate you can detect the pulsing.
Do you think it could be low of 134 causing the compressor to kick on and off? I can hear it cycling, but it's not every second or two...it seems like a normal cycling interval to me.
Do you think it could be low of 134 causing the compressor to kick on and off? I can hear it cycling, but it's not every second or two...it seems like a normal cycling interval to me.
