jaguargod

I took my 8 in for service yesterday. I had a squeak in the dash and a thumping sound when I rolled up the drivers window. I also complained of poor gas mileage and a few hard starts. The dealership installed some new high performance spark plugs, and gave my car the newest PCM flash, which I guess is "N". The throttle seemed a little more responsive driving home from the dealership, but other than that, not much change I've noticed yet. I'll post any improvements that I notice.

jnam27

jaguargod, did they fix your thumping sound from the window? I also have that periodic thumping sound when I roll up the both side windows. Wondering that is natural or a real problem.
Thanks.

jaguargod

It is something to do with a cable binding up and causing the window to temporarily come off of the track. They diagnosed it today, but they had to order the parts for it. I don't know how serious it is, but it will probably get worse if left unresolved.

Dookie_Rx-8

Do u know exactly whats the difference in your old spark plugs than your new ones or is it just colder or hotter plugs?(sorry forgot which plugs everyone wanted)

Go48

Don't know about "high performance", but I think you will find the info on the "new" plugs on page 9 of the TSB at the link below.

http://www.finishlineperformance.com...4-05-1448b.pdf

jaguargod

Yeah, high performance might not be the best description. I just know they were improved. They weren't going to give them to me, but the tech test drove my car with some sort of diagnostic tool that measures fuel mileage, and he determined that my car got poor fuel economy, so they went ahead and let me have them.

tkamakar

The dealer fixed the window thumping by replacing the motor assembly, but they are still claiming they cannot reproduce the squeeking. It seems to come from the driver side airduct and it gets worse for me when I drive the car a long distance (>45 min). At that point it is continuous and I don't have to go over any bumps to hear it, the vibrations from the road surface are enough. Any ideas of what is causing it anybody??