Ok, I recently installed a 2.5in downpipe back.

After a few weeks of driving, I notice when I get on the gas (floor it) I lunge forward (like normal) get speed a bit, then it boggs down and the exhaust putters until I let off the gas a bit.

It boggs down randomly, between almost any RPM.

I've got a CEL (will check soon) but have had it even before the bogging started (may have changed, who knows?)

VTEC still hits, so I think its my IACV (crazy rev idle at stop)

I am running a JDM H22a, with the Prelude ECU.

MODS: H22a, LSD H22 Tranny, Intake, 2.5 in Downpipe Back, No Cat (resonator only + muffler), Headers, No PS/AC. (all I can really think of ATM)


Lemme know if I can be more specific

 

its the vtec

 

throttle position sensor?eacv is only for cold start,it may be your intake air temperature sensor?

 

incorrect, the iacv controls the idle when the motor is warm. the fitv controls the idle when the motor is cold. i dont think the jdm h22 has a fitv. not 100%. pick up a fuel press reg and tune the air/fuel a little.

 

I've got both an IACV and a FITV. Basically the same exact setup on the accord.


The problem seemed to manifest itself post-exhaust installation.
(then again, I have seem a hell of alot of coincidences)

It seems like it smells a little rich when I bogg (managed to bogg down in the parking lot)

Once again, it is VERY random.
It Will happen when I go WOT maybe 5% of the time.

But when it does, I surely notice ;p


Im on a stock ECU, so any walkthrough would be nice to get ;p

OBD1, p13? (w/e the stock JDM Lude was)

 

check the code, probably a bad sensor messing up your timing. check the code for free at autozone or advance auto parts.

 

Or get tuned...

 

The only CEL is my EGR valve (code: 12) and it has been plated off for a while.

 

what would the tune do for me?

Alot of people threw a variety of issues, would that tune pretty much fix em all at once?

 

Anyone else? ;p