ok, i solved the TPS CEL and are getting no coes at all now!

it had something to do with the Thottle body I think, I swapped out the D15B intake manny and thorttle body with a D15B7 that I polished, and ported the ports......


Although, now I am hearing a "humming" comming from the throttle body (intake) and when I slow down at a stop sign after shifting, the car like "shakes" like the RPM's Dropped dramatically, then returns to normal. so thats a NEW problem. What do ya think?
D15B vtec swap, Vtec not wired. with D15B7 non vtec intake mannifold with the purge sylenoid hooked up.

 

ok, so possible problems....

Vacum leak? Something wrong with the FICV? The valve at the bottom of the thorttle body?

 

I started up my car tonight and noticed it didnt do the dramatic idle loss like it use to, after I drove the car for a lil bit, it started doing it......

FICV?

 

anyone?

I noticed it doesnt( shake and dropp rpms dramatically when the car is fully COLD)


BTW, my intake many is ported to the gasket.


Anyone have an idea? Car runs ok, just when I get into nuetral(after warmed up) the car will shake, and feels like rpms drop)
No CEL, I just hate to have a problem like this...

 

i had same problem on my y8 found out it was the IACV.

 

hmm, sounds possible, only thing is, this is the same IACV that I used on my previous D15B7, mabey I messed it up when I cleaned it with carb cleaner?

 

Changed the IAC valve and it didnt Fix the problem.....


Vav leak? FICV?

 

UP, car shakes.......

FICV? Vac leak?

 

yo

 

I was just messing with my 70mm tb yesterday. When i manually pushed the butterfly closed, it made the noise your talking about, and the idle was so low it shakked like it was about to stall. Adjust your throttle cable a turn tighter, and see what happens. I have a lot done, and I like to keep my idle at 1500. It sounds and feels like a stock car at 900rpm

 

the throttle cable is non adjustable, or is it? I don't knopw how to adjust it...

But mabey my TPS sensor is in the wrong location? I wasnt sure where to put it when I put it back on...

 

O ok, the idle adjusting screw, adjust it by a flat head screw driver...
Yea I did that, I had it idleing kinda high, noticable sound in the motor and it still did it........

 

1

 

ok, changed out the Fast idle control valve on the bottom of the thorttle body, and it kinda fixed the problem, still shakes a lil, not as bad...

It's almost like itll only shake after I rev it up a lil and in nuetral. So now im thinking a Vac leak, any ideas??

 

where is these vacuum located?