hello and sorry in advance, I know this problem has come up but I didn't have any luck finding the old threads.

Details:
H2b
P75 ecu, chipped/added vtec
tuned on crome
no CEL, runs great

The problem is as stated in the title. There are no other issues and vtec engages normally. The problem is slowing down where it seems like the car is mechanically coming out of vtec but continues to use the vtec fuel map because it runs very rich below the crossover. Revving past the crossover point the car runs normally and vtec re-engages.

The car will also run normally if I dont engage vtec so I know that the individual maps are fine, i suspect its a setting issue just wondering where to start looking. If i put the clutch in while rolling the car will stall (too rich) and then when I restart it its back to normal.

 

Try to use Moates flash and burn to erase the chip a few times then try re-burning the map. If that doesn't work then try using a new chip that hasn't been burned to yet. If all else fails try using an older version of Crome. I've experienced this issue a few times and different things work. But for the cars that do not cooperate at all, i used a gold bin and the problem stopped altogether.

 

Sounds like the tune. There is all the advanced settings than can be tuned as well. Iat fuel compensation ect. You.could compare your tune to a stock base and reset any advanced settings and start again. Gold .bin is only good for emulators. Never heard of one working on a chip before.

 

are you running a pressure switch?

even with it disabled it seems to mess the map up without it.

 

I'm guessing you installed the VTP remover plug-in?

Start over again without it, and just jumper A4-D6 if you don't have a VPS.

 

This has my attention, as its the second mention of a pressure switch issue.

I didn't clarify my setup in the initial post. The motor is the "Blue top H23a VTEC" or whatever you want to call it.
The H23a uses the "1-wire" VTEC solenoid and does not have a pressure switch, therefore I did in fact use the VTP remover plug-in.
CROME says ground your pressure switch wire but my harness doesn't have the wire and i have run out of OBD1 ecu pins (damnit!) so I did not ground D6, could this be my problem?

By jumper A4-D6, you are referring to the ECU connectors right? That's the VTEC solenoid signal and the pressure switch, I'm not sure how this could fix the problem.
Can anyone confirm this fix?

Lastly, thanks to everyone for trying to help

 

Even with mine jumped it was messing up. You have access to a usdm switch ?

 

nope, nor do I have the interest. If its going to cost money im going to live with the problem for the time being and go with another tuning method when possible as i'm losing patience with CROME for a number of reasons...

 

I explained what the problem is and how to fix it. Yes, jump the wires running to A4-D6, or use gold and you can disable it.

 

chrome in a mild build is great but do as you please.

 

The main reason I say that is im going with an itb setup and looking for something potentially better. I spent a lot of time playing around with my last setup and was not fully satisfied. Plus, I already have an ostrich and what not so an upgrade isn't too expensive.

Ill try a couple of these things tonight and report back tomorrow.