KADE Acceleration probs - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Dream240 · 02-26-2007, 07:29 AM

UPDATE:

Okay, i did a real big tear down of the intake system this past weekend. I found that my swirl control valve is gone. Basically the butterflys don't respond to vaccum anymore. So that answers my question about the kicking during acceleration. I also used about 2 1/2 cans of throttle body cleaner on the upper intake plenum, IACV, AAV, and support lines, and removed about 1/16" of carbon buildup off everything. The butterflys were completely covered in gunk. Gross.

The problem I'm having now is that the dealership is saying that you can't buy the part separate, and even still it's discontinued. I'm thinking since I can't buy it separate that I'm gonna have to buy an entire new upper intake plenum that will have it attached.....freakin stupid.

Upon re-assembly, my car pulls much, much harder than before. And after cleaning the IACV + AAV, the idle is a bit smoother, still has a slight jump about every 5-7 seconds, but it's only noticeable through the exhaust note, not the RPM guage. Overall it drives ALOT better!! The other problem I found was that some of the intake mani bolts were coming loose!! And the gasket had a crack in it.

I also finally pulled the front cover off and removed the other timing chain guide and replaced the tensioner....NO MORE RATTLE!!!!!

Thanks guys for your input... my car is finally chirping 2nd!! 3rd here I come!!

02-26-2007, 07:29 AM	#12
Dream240 Nissanaholic! Join Date: Dec 2002 Location: Inland Empire, California Age: 46 Posts: 2,188 Trader Rating: (8) Feedback Score: 8 reviews	UPDATE: Okay, i did a real big tear down of the intake system this past weekend. I found that my swirl control valve is gone. Basically the butterflys don't respond to vaccum anymore. So that answers my question about the kicking during acceleration. I also used about 2 1/2 cans of throttle body cleaner on the upper intake plenum, IACV, AAV, and support lines, and removed about 1/16" of carbon buildup off everything. The butterflys were completely covered in gunk. Gross. The problem I'm having now is that the dealership is saying that you can't buy the part separate, and even still it's discontinued. I'm thinking since I can't buy it separate that I'm gonna have to buy an entire new upper intake plenum that will have it attached.....freakin stupid. Upon re-assembly, my car pulls much, much harder than before. And after cleaning the IACV + AAV, the idle is a bit smoother, still has a slight jump about every 5-7 seconds, but it's only noticeable through the exhaust note, not the RPM guage. Overall it drives ALOT better!! The other problem I found was that some of the intake mani bolts were coming loose!! And the gasket had a crack in it. I also finally pulled the front cover off and removed the other timing chain guide and replaced the tensioner....NO MORE RATTLE!!!!! Thanks guys for your input... my car is finally chirping 2nd!! 3rd here I come!! __________________ Don't mess with my monkey...he's loaded.