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Problem with V-tec on a D16Y8

Old 04-11-2007, 08:08 PM
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Default Problem with V-tec on a D16Y8

Hello HMT Comunity:

I have a problem with my Vtec System and ECU. I got a 1997 Civic Ex with the stock P2P OBD II ECU but i have the Vtec engaging by the MSD RPM Activator Switch with a 4800 RPM Engagement point. The problem i am having is that sometimes (recently ALOT of times) i get the check engine and the OBD II Scanner shows Vtec system malfunction. I was wondering if anyone here knows how i can Fix this without switching to a Hondata Chrome or Uberdata or a Apexi VAFC or VAFC II basicly by keeping the Vtec opening with the RPM Activator switch since it is brand new and was a head ache doin the relay wireing to change the RPM Switch from negative to positive wich is what its needed to open the Vtec.
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Old 04-11-2007, 08:44 PM
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Default Re: Problem with V-tec on a D16Y8

i thought vtec engaged at 4800 on those? not sure tho. if that is true why did you add the msd?

plus i have no idea, i dont ---- with the vtec garbage.
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Old 04-11-2007, 08:52 PM
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Default Re: Problem with V-tec on a D16Y8

no Vtec on the D16Y8 engine engages at 5800 RPM or close to it sometimes 5500rpm
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Old 04-11-2007, 09:03 PM
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Default Re: Problem with V-tec on a D16Y8

my bad, i got a vafc 100 shipped
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Old 04-11-2007, 09:19 PM
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Default Re: Problem with V-tec on a D16Y8

nice they selling one here for 150 just dunno if to get it or not i managed to put 200whp 165ft tq. at the wheels with stock engine stock internals stock ECU but the VAFC manages to advance the ignition so i have no idea if my engine would be on the safe side with the AFC Hack. http://www.cardomain.com/ride/2613986 there is the dyno sheet and car pics
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Old 04-11-2007, 10:30 PM
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Default Re: Problem with V-tec on a D16Y8

I don't even know where to begin. Maybe you should unbolt everything from the car until you've read all stickies and understand them.
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Old 04-11-2007, 10:56 PM
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Default Re: Problem with V-tec on a D16Y8

Originally Posted by Joseph Davis
I don't even know where to begin. Maybe you should unbolt everything from the car until you've read all stickies and understand them.
I dont get it but w/e Ive ran the set up like that for over 1 1/2 years now just the v-tec thing is getting to me. 9 PSI is the threshold for these engines and the fuel management is being done with a 1:1 fuel regulator, 315cc Toyota MR2 none turbo injectors and just in case a 5th injector with a boost switch since i have the stock P2P ECU.

Originally Posted by Dmc1
and take anything MSD off of your honda and go with crome/uberdata.
Msd makes good stuff for old school v8s but all their ignitions and parts do is screw up a honda ignition.
as for Chrome and Uberdata, 2 big problems with them:

1- i need a OBD I P28 (minimum or p72 , P73) and have the car converted to OBD1 either with a 92-95 harness or a harness converter.
2- No one in Puerto Rico tunes chrome and uberdata so that means i'd have to buy a laptop , rom programer and tune it myself wich between the lap top , rom programer and the other goodies = alot of cash
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