Idle bouncing
I hate ricers
Joined: Dec 2004
Posts: 869
Likes: 0
From: Florida
Originally Posted by InfiniteVTec
My car is N/A with many upgrades, it runs best on unleaded plus... which is 89 octane gives me the best Power and fuel economy.. If I use 87 octane, it gives me poor performance good econ, and with premium 91octane, good performance poor fuel econ. Hopefully my VAFC2 will give me even better power n fuel econ.
As for the idling issue, seems like a vacuum or Intake Manifold leak.
As for the idling issue, seems like a vacuum or Intake Manifold leak.
I'm made of meat!
Joined: Mar 2003
Posts: 3,580
Likes: 0
From: Richmond, VA
Please guys... use cheap plugs. The NGK variety works best in these cars. They're like $6 a set, so you could replace these with more frequency than platinum or iridium or splitfires... whatever. If you want better performance with your spark plugs, index them. If you don't know what indexing spark plugs is, google it. Never install ANY plug without checking the gap. I think the tool for it costs $.50.
If that's the only thing that's non-stock or that has changed, try putting your old plugs back in. I know it seems silly, but you must eliminate variables.
I still think it's a vacuum leak. Engines don't rev on spark alone. There has to be too much air coming into the intake manifold to make it rev higher than idle.
If that's the only thing that's non-stock or that has changed, try putting your old plugs back in. I know it seems silly, but you must eliminate variables.
I still think it's a vacuum leak. Engines don't rev on spark alone. There has to be too much air coming into the intake manifold to make it rev higher than idle.
Senior Member
Joined: Apr 2003
Posts: 6,157
Likes: 0
From: Dallas, TX
Originally Posted by MattyFresh
FITV? I have no clue what this is...maybe im an idiot but here are some guesses just for fun. Fuel Injector Tempurature Valve? Well actually thats all i can think of.
IACV = Idle Air Control Valve
Senior Member
Joined: Apr 2003
Posts: 6,157
Likes: 0
From: Dallas, TX
Originally Posted by Jafro
Please guys... use cheap plugs. The NGK variety works best in these cars. They're like $6 a set, so you could replace these with more frequency than platinum or iridium or splitfires... whatever. If you want better performance with your spark plugs, index them. If you don't know what indexing spark plugs is, google it. Never install ANY plug without checking the gap. I think the tool for it costs $.50.
If that's the only thing that's non-stock or that has changed, try putting your old plugs back in. I know it seems silly, but you must eliminate variables.
I still think it's a vacuum leak. Engines don't rev on spark alone. There has to be too much air coming into the intake manifold to make it rev higher than idle.
If that's the only thing that's non-stock or that has changed, try putting your old plugs back in. I know it seems silly, but you must eliminate variables.
I still think it's a vacuum leak. Engines don't rev on spark alone. There has to be too much air coming into the intake manifold to make it rev higher than idle.