ok i have 92 cx with just a 95 z6 swap, had for last 4 years. Car ran great , never any problems, then one day she would not rev past 6200??, car has NO vtec. but here is the strange part NO CEL, cant find out whats wrong. so far i have changed
plugs and wires
fuel filter
dizzy coil
vtec solenoid
i have a b-series on the way just want to know whats the hell happened.
any info would be great
thanks
-AJ

 

That's very strange, does the CEL come on when you first turn the key to the "ON" position?

 

yea the CEL works, i can up plug my pressure switch and it works,

 

Is it low on oil?

 

That is really strange, possible bad ECU...If you can try another P28 that you know is good.

 

oil level is good ( i always check it)
tryed a buddies ecu did same thing in my car,
but his car ran great with mine, so my ecu has to be good

 

Other than not crossing VTEC everything else is perfect? Not studdering, hesitations, tach acting weird, anything?

 

everything is good. same gas mileage, nuthing. i would have never know if i didnt miss around with this truck one day after work. i mean its like i have a stock dx that only revs to 6200

 

Damn, I'm pretty much stumped without being able to look at the car in person

This is very strange, but I did a B16 swap in a customers CRX and I tried 2 different PR3's and neither one would cross VTEC and would rev limit at 7K. Neither one would code for anything and the car would run perfect. Both ECU's would cross VTEC and rev out to 8200 in another B16 car. I tried everything I could think of with no change, then tried a third ECU and sure as **** it crossed over and revved all the way out, put the other two back in and it went right back to no VTEC. Craziest **** I've seen in a while. :shrugs:

BUMP for more ideas!!!

 

bump !
help fix my car

 

variation in chip stamping at the factory?
sounds like the type of problem that a carmaker would keep under their hat because not enough people noticed the run of bad ecu's for the media to force honda to do something about said problem

try a chipped ecu?