Rough, rough idle - but redline revving cures it?

ptubb · Post by **ptubb** » 06 Sep 2005, 13:26

I have a 1996 850. Over the last couple of months this problem has gotten worse. When I start the engine in the morning or when it has completely cooled down it starts fine. But if I have been driving for a while and stop the engine and try and start it again while it is still hot, it idles very roughly, like at half the RPMs it should. But if I rev the thing to 6000 RPM while idling poorly, 8 times out of ten it then starts to idle properly. Any ideas? Thanks!

White850Turbo · Post by **White850Turbo** » 07 Sep 2005, 05:27

Try pulling the plug out for the MAF when the car is idling poorly. If idle improves, you need a new MAF. Also, is this a turbo car?

ptubb · Post by **ptubb** » 07 Sep 2005, 13:18

Thanks for the reply. No, it isn't a turbo model. In fact, it is the 10-valve GLE model that was never offered in the States. I'll give that a shot and see what happens.

ptubb · Post by **ptubb** » 09 Sep 2005, 07:45

Unfortunately pulling the MAF had no effect whatsoever. Anyone have any other ideas? I shudder at the thought of what I will have to pay a Volvo dealer to diagnose and fix this problem!

White850Turbo · Post by **White850Turbo** » 10 Sep 2005, 08:22

Got any codes stored? CEL?

ptubb · Post by **ptubb** » 12 Sep 2005, 10:33

Bah, I've had enough so I took it to some dude to fix this and other problems. Will post the remedies - might help someone in the future. Thanks for the help.