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A/C quits after doing tune-up to the engine

mopar68don on Wed February 10, 2010 2:10 PM User is offline

Year: 1984
Make: Pontiac
Model: Indy Fiero
Engine Size: 2.5
Refrigerant Type: R12
Country of Origin: United States

My a/c was working verywell before I did a tune-up. I changed the wires,plugs,rotor,cap and fuel filter. Later in the day I took it for a spin and when I turned on the a/c the idle would kick up, but it would not blow cold. Also, shortly after turning the a/c on, then the motor would start surging and finally stall out. Any ideas what might have happen??

JACK ADAMS on Wed February 10, 2010 2:29 PM User is offline

Start by back tracking all your steps to make sure all vacuum lines are secure. Also check any electrical that may have been un-plugged as you did your tune-up.

Edited: Wed February 10, 2010 at 2:30 PM by JACK ADAMS

mopar68don on Wed February 10, 2010 2:39 PM User is offline

Thxs. Jack, will give it a try. I even thought about putting all of the old stuff back in just to see if it made a difference. It has to be from putting the new wires on, from feeding them around everything.

NickD on Thu February 11, 2010 5:33 AM User is offline

Did work on an 84 Fiero system some18-21 years ago, classified that was one of the worse if not the worse AC systems I have ever worked on. Is such as thing as coincidence where one of those super long AC lines running up to the condenser could have sprung a leak. Recall looking under the hood, was like stuff was thrown all over the place with not even enough space for a gallon of milk and a loaf of bread. And the reclining seats couldn't be reclined, was much younger then, too much, just got rid of it. Each to his own, would check pressures just in case and you don't mention if your compressor is even trying to cycle.

Chick on Thu February 11, 2010 6:32 AM User is offlineView users profile

If it worked before the tune up, I agree with jack, that a wire was unpluged or knocked off, don't put the old stuff back on, it has nothing to do with the AC..
Hope this helps..

Email: Chick


Freedoms just another word for nothing left to lose

NickD on Thu February 11, 2010 9:15 AM User is offline

Can't argue that, harnesses left somethings to be desired. Recall the valve cover dripping oil all over the place, compressor was mounted on the right front of the engine, difficult to reach from either the top or the bottom, harness went under the vehicle to the front, think the cycling switch was up there, then to the climate control panel with other wires scattered all over the place. Pinning this down to about 1988, like 22 years ago, been a lot of cars since then.

JACK ADAMS on Fri February 19, 2010 3:29 PM User is offline


Did you find the problem? I hope you did but if not and you are tired of dinking with it, give us a call and maybe we can help since you’re here locally.

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