I searched for similar symptoms, but found nothing. I swapped a 98 B18C1 into my 96 DX coupe. Vtec kicks in for a certain amount of time and then without notice, stops working. I get a complete rpm cutoff at 5000 rpm and I get a CEL code 22 (VTEC pressure switch). If I restart the car either at a stop light or whatever, I'll be able to hit Vtec a couple of times again (even with the check engine light on) and then it does the exact same thing as before. My rpm cuts off at 5000 rpm. It basically bogs at that speed. It does the exact same thing that any engine does when it has a rpm or speed cut off. When I hit Vtec though, I can redline it. But once I get the rpm cutoff at 5000, I have to turn the engine off and then back on to be able to hit Vtec once more.

Anyone have similar symptoms to this or might know what I can do to try and fix this odd problem? Any help would be appreciated.

 

bump

 

now i'm no expert but it sounds like you may need to change your vtec pressue switch

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by biggs2.2 &raquo;</TD></TR><TR><TD CLASS="quote">now i'm no expert but it sounds like you may need to change your vtec pressue switch</TD></TR></TABLE>

Really? Even if it works a bit once the car has been restarted?

 

*Shakes magic 8-ball*

All signs point to yes

 

check and make sure you have no loose wiring. Make sure the pins in the ecu are touching and nice and tight.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22Hatchy &raquo;</TD></TR><TR><TD CLASS="quote">check and make sure you have no loose wiring. Make sure the pins in the ecu are touching and nice and tight.</TD></TR></TABLE>

That reminds me, when I was adding the wires for the Vtec pressure switch and IAB, I had run out of extra pins that would go into the ECU clip. I bought some at a scrapyard, but they were from an OBD1 clip not OBD2. I only noticed it once I got home. I was able to fit them in, but it required a bit of crimping to get them to fit. Could this be the problem? Maybe the OBD1 pins aren't touching the ecu all the time. Would I get these kinds of symptoms if it was the case?

I bought some OBD2 pins finally, but haven't had a chance to replace them.

Let me know what you think about this.

 

i had this problem. i had the wrong size pins and they would fall out when vtec engaged. altho now i got the right pins but after vtec engages i'm getting a code 22 and then no more vtec . the vtec oil pressure sensor is good though. i have no clue.

 

I just topped the oil off and it still does it. I'll change my pins tomorrow and I'll see what happens. 90g2ls I'll keep you posted.

 

Fixed the problem. It turns out it wasn't the Vtec pressure switch that had the OBD1 pin, but the knock sensor. Changed it and now no rev limit and Vtec engages w/o a problem.

Thanks guys for all your support!


Modified by e-kay at 9:12 AM 6/4/2004

 

I am having this problem i hope this works thanks to the search i found some help! 1

 

ok so did you change your knock sensor or did you change the pin for the knock sensor?

 

Just the pin. It wasn't in full contact with the ECU.

 

Isn't a code 22 and electrical problem anyways?

 

i thought it was the oil pressure switch, mines was throwing code 22 and its because the oil line was too small and the head wasnt getting enough oil and the vtec wasnt enguaging