1995 - ENGINE HELP!

[nolds34]

Hello Everyone, it's been a long time since I've posted on here but glad to see people are still active.

I have a 95' Mustang GT with GT40 crate motor. #30 fuel injectors, MAF sensor, and had the car custom tuned w/chip not too long ago. The car has been running better than ever.

I recently drove it from Illinois to Michigan. Everything running great but the AC stopped blowing cold air so I took it in to be re-charged and the tech needed to replace a cap near the line and re-charged the system.

When I picked up the car and started it, it immediately started shaking (very badly). The tech said it is coincidental that this this is happening after the AC repair and there is nothing they can do. They checked the AC compressor and that's not bogging anything down. It's really not driveable. I ordered an OBD1 reader as they didn't have one. Any thoughts or suggestions? This out of state mechanic really doesn't want to help as the car has been modified and this issue happened when it was in their hands!

The only other item to add is that the oil was recently changed and is running a bit high - not sure if that has an impact.

 

[a91what]

make sure nothing was unplugged by the mechanic. what did he have to replace exactly?? Is the MAF plugged in?

 

[jozsefsz]

It would be unusual for just an a/c recharge to cause a problem. It's not impossible they screwed something up, but if they aren't trying to sell you diagnostics and labor, I'd be prone to believing it's just an unfortunate coincidence. Get that scanner - and run the cylinder balance test with it. I've had nearly-new (but crappy) injectors completely fail. That'll help pinpoint where to look. Also check plug-wires (all connected, proper firing order), it's pretty easy to knock one of those loose when working on the A/C in the cramped engine bay.