Ok I just bought this car about a week ago and the old guy that sold it to me lied about it a lot. I am coming from a high HP turbo DSM that I built myself so I know my way around a car but I never have had this problem.
1. Whenever I turn to the left or slightly turn the wheel to the left I hear a loud screeching or squealing noise from the drivers side tire but none when I turn right. Sometimes I hear a chirp or a short squeal when driving straight. Wheel bearing? Always thought wheel bearings made a low humming or grinding noise when bad.
2. Never had A/C on the DSM so this is new too. While engine is hot and cruising down the road at a constant speed around 40ish I get a slight jerk like the ECU is cutting the fuel for a second. It does this a lot with the A/C on. It barely does it at all with it off. Also while idling at a light for a little bit I get a little idle surge when the A/C is on. It spikes up to about 1200 then goes back down.
I parked it while opening the hood and turning the A/C on and well the engine speeds up to about 1200 and then I hear a loud high pitched grinding noise or like nails on a chalkboard noise coming from the belt area then the engine slows back down. It doesn't do it with the A/C off.
Any help would be great as GMs are new to me. I have been around unreliable Mitsubishi's all my life.
1) That loud screeching sound is probably your brakes. Check the pad wear. Normal for squeels to occur when turning but disappear when straight. Will be screeching 100% sooner or later tho.
Very easy DIY job.
2) Don't have AC so can't really comment. "loud high pitched grinding noise" from belt area is no good, pulley on compressor or compressor itself???? Belt looks ok?
Jeff
that AC noise is the compressor, when the idle is doing that, its the compressor cycling. Sounds to me like the compressor is starting to lock up, causing the belt to slip when the clutch engages (chalkboard), the grind is the compressor most likely, pistons in it slapping. This is not a good thing. Have the system pressure tested at a shop, it MAY just need a charge, R134a refrigerant has a very small molecule, and its fairly normal to lose a bit of charge over time.
Off topic, I had the honor of driving my brother in law's 92 Laser GSX, it was bone stock except for the airfilter box being cut partially away, and that thing would MOVE. It was a pig in 1st, but once the rpms got up in 2nd, MOVE ASIDE.
Also the RPm surge when the AC comes on is normal.
FU Tuning
Thanks guys I was hoping it only was the brakes but bought a wheel bearing anyways. I will check those today. As for the hesitation thing while cruising could that be the A/C too because it sometimes does that as well without the A/C on. Its like I'm tapping the brakes a little when it does it. The RPMs drop a couple hundred as well when I feel it.
As for the DSM. ha ha Where to start. Damn thing pulled like nothing else I have ever drove. The AWD launches pretty much broke everything in the driveline. Pulling constant 1.6 second 60' times really screwed my rear suspension up so I had to upgrade. Fastest time in the 1/4 was a 11.3 and since I didn't have a cage they kicked me out of the track. haha I was pissed when the vac hose popped off the Tial 38mm. I had two zip ties holding it as well which doesn't make sense. I blew the first engine because I over tested its limits back in the day but it was detonation because the log from the ECU showed it pulled 14* of timing from knocking before it blew. Stock engine blew at 467awhp which ran it like that for about a year. haha
The AC is causing the hesitation because the compressor draws a good chunk of power off the crank with the AC clutch engaged, which feels like a slight hesitation.
And with the ac clutch siezing up, your car takes a bit more time to react. More drag
now DIE!
Yea but with the A/C clutch and compressor off and still feels like its misfiring while cruising down the street. I'm gong to check the plugs to see if they are old. It does it while cruising most of the time at a constant RPM and sometimes when accelerating.
