I bought a 91 accord coupe EX manual transmission 4-cylinders VTEC F22B The engine is from a 95 accord . I was told I would need to change the CPU in order to have the VTEC engage. My question is what type of CPU would I need to purchase. The Car Runs Pretty Good But It Could Run Better .. Thank u

 

although technically you could call it a CPU the common term is ECU. this will help you find the right component to start with.

although i think there is a factory ECU that would work i couldn't tell you which for sure. what i do know.. you can have an P28 ECU chipped to work with that engine allowing VTEC to function. you'll find plenty of info in the >Accord FAQ< section about that.

 

You would need a conversion harness, OBD1 to Obd0, and a ecu from 94-97 accord EX. Or, you can run a vtec controller.

 

It is a lot more than a CPU - a "computer", yes but you not a CPU....

OP will most likely need to add the wires for VTEC similar to an H22 swap in an LX or DX Accord and then switch the ECU. Since he's already OBDI the OBDI ECU from a 94 or 95 Accord should work.

I believe the pinouts for those ECUs are in the FAQ

 

Chassis is obd0, engine is obd1.

 

Whoops correct, 91 was the last year it was OBD0

So he would need an OBD0 to OBDI harness in addition to the newer ECU.

 

91 accords are obd1

 

Since when?

 

I still think he would be better off just running a vtec controller. Should have no problem getting one for under $100 and install is pretty simple.

 

my 91 dx is

accords are different than civics and integra

 

Yes, in many ways they are, but I can say, as fact, that '91 accords are obd0. I don't know why you think your's is obd1, but it didn't come that way from the factory.

 

http://www.cb7tuner.com/vbb/showthre...&highlight=OBD

Found that, I can't find a decisive thing saying the Accord switches in '92 like Civics, Integras and Preludes from OBD0 to OBDI

*edit*

Found it, apparently I was correct the first time as was jdmwannabe

http://www.cb7tuner.com/vbb/showthre...&highlight=OBD

 

So, I called Honda service at my local dealer to get the info. The first guy I talked to said obd0. Just to make sure, before I came back here with a big chest and started flaming, I called a different dealer and was told obd1. So, sorry bout that guys.

That being said, a ecu out of 94-95 EX will work, plug and play. ECU ID - P0A-A01 for the manual.

 

there's no flaming allowed in accord forums....

you meet the nicest people in an accord

and he'd still have to wire up vtec, which is easy as pie!

 

HI THANK U GUYS IT WAS A GREAT HELP NOW WHERE CAN I BUY THE V TEC CONTROLLER

 

Really? Cuz I drive an accord, and I'm kinda a dick.

Alvarado - Do a google search for vtec controller. And I'm pretty sure you can find a write up on HT about the install.

 

look around online and in magazines n all....if you just want a cheap one that works search ebay

 

Make sure if you buy a VTEC controller that you don't go setting your VTEC for 4500 or 5K like an H22. The F22B1 cam is designed for VTEC to engage down in the 3200 - 3800 RPM range. If you try to change it from that it will just fall flat on it's face.

IMO the best thing to do would be to find a used OBD1 P0A ECU. Saw a few on ebay for around $50 - $60.

 

its this OK ??? 94 95 HONDA ACCORD 2.2 VTECH 5SPEED ECU ECM POA A01 F22 For sale is a used but very clean and in perfect working condition ECU,ECM from a low milage 1995 Honda Accord with the 2.2 V Tech engine and 5speed transmission.This is a running car just wrecked.This is very clean virgin ECU ready to be used for your stock replacement or chipped for your performance project. This Ones From E bay Bidding $12.00

 

Yes, that is the one you are looking for.

 

I am learning about the VTEC engine. i understand it is variable timing. With early 90's accords, approx. what would be the HP gain and fuel mileage? Just a brief description would be great. thanks

 

Vtec doesn't give you more max power. It increases power in the low/mid range. When choosing a cam for an engine, you basically have 2 choices - High rpm power, which makes your low/mid range weak, or strong low/mid range which makes your power fall off as rpm's rise. Vtec gives you the best of both worlds. It is actually Variable Timing and Lift Electronically Controlled, but VTLEC just doesn't roll off your tongue like the all mighty V-TACK.

 

the 95 2.2 SOHC Vtec motors put out about 145hp IIRC.
thats a pretty decent gain over stock, which i think was about 120HP.

 

Everything you need is here

 

Ok Guys I Just Got the ECU now whats Next ?? Can u PLs Help TY