Join Date: Mar 2012
Location: Cincinnati, OH USA
Vehicle: 2001 SLK 320
Other Toys: I've got about 20 Fieros, Camaros, MBs, Rams, Jeeps, Suzuki Bikes, Arctic cat Sleds
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanked 45 Times in 21 Posts
Is this overheating (120C)? Cylinder miss? What could be going on?
So I just bought this two days ago, and I've put 250 miles on it since. Everything was running great... now I have an issue that came out of nowhere.
First the coolant temp gauge started bouncing between 40 and 80c... then between 80 and 120, and then sitting at idle it was sitting right at 120. So I let it sit for a few... start it back up and its sitting at 120. Drive it and it drops to 80 while driving, creeping back up to 120 by the time I get home.
1. I haven't had the car long, so is that normal?
Simultaneously, It feels like a misfire is consistent... at really low RPMs (like 15) you can really feel it. at 30 you can kind of tell its there but its more drivable.
Both of these just started the last 3 miles or so... any idea what it could be?
(extra info- The guy I bought it from said this happened about 2k miles ago. he disclosed itg when I bought it- He has receipts for it, but had the coilpack replaced and at the time they noticed a small water pump leak, so they replaced the water pump too, and the belt. It was driving perfectly find when I first got it, so what could have caused these symptoms to return? planning on having the rear diff and trans fluid plus oil change done in about an hour, then looking at doing the rest of the 100k (plugs and stuff) even though I'm a little short.... but the temp and the coil pack seem completely unrelated??)