OK, I have a Stock D16Z6 Engine in my SI. I've installed an RSR cat back exhaust and replaced my stock Manifold with another stock one that is only slightly different from the one it shipped with (different bolt pattern for the heat shield.

When I sit at Idle I can feel a slow bub-bub-bub-(nothing)-bub-bub... You can feel it through the seat more than hear it.

It almost feels like an old muscle car sounds (Someone will know what I mean) That slow hit and miss grumbling.

Anyone know what this is? The car runs great and if I bring the revs up slightly it stops entirely.

Thanks

Arbadacarba

 

sounds like a low rpm idle problem

 

sounds like idle for sure

 

Sorry Gentlemen... Could you be more specific? The car runs very well. What kind of problem are we talking about?

Thanks for such quick replys by the way.

 

when your car is up at running temp, what rpm does it idle at??

 

I'm gonna say 600 RPM for now but I'll check on the morrow.

It NEVER stalls (OK That's a lie but that's just because I'm a screwup with the clutch) or stutters when it idles. In fact I taught my niece to drive stick and she liked that she could drop the clutch and ignore the gas without it stalling.

Damn you guys are fast.

 

mine has the lub you talk about but it idles about 4-500 rpm's few times it was like 300, suprised it didnt stall.

it is supposed to be 750-850 rpm's

 

i dle right under 1k so liek 900?

 

muscle cars do it cause of cmas and shafts, yours might be the exhaust flanges virbrating or something little

 

Could be idle, could be vibration. If you feel more than you hear, probably idle. If your idle is 600 that is a little low. Toward the top of your tb there is a big flat head screw. By turning it, that fine tunes your idle. You need to turn your idle up a bit anyway, so try that and if you still have a prob let us know.