Hey guys
Im new to tuner cars but have been building cars for 40 years
Im doing a engine swap from a 90 f22a1 to a 94 f22b1
The motor I got has the complete engine harness
But I have been told different things from different people
Ive been told you dont have to change the ECU just change 2
Wires on #1 plug , but also been told I must change the
ECU from obd0 to obd1 and get a jumper harness.
Whats the right way ? Im confused please help.

 

It depends on the year of the engine (96-97 is obdII and 94-95 is obdI) you can always eliminate parts from an obdII to make it obdI and add parts to an obdI to make it obdII.

Depending on the route you decide to take (obdII having more diagnostics) you will need to change the ecu to run the current engine type you are installing.

Now I'm not a pro at this exact stuff. If my memory serves me correctly the only major difference between those engines in obdI and II is a crank position sensor. If you decide to go obdII and the engine is obdI you will have to change the oil pump to a 96-97 oil pump and add the crank position sensor.


Posted from Honda-tech.com App for Android

 

Ok the motor im installing is a 94 with a complete
Engine harness, I also have a obd1 ecu with a jumper
Harness, but I don't know where some of the
Sensor s are. Do I need to get a 94 haynes manual to
Locate the sensors & where to hook up the loose
Wires or does anyone on here know what to do & will
You help me ?

 

Shitty thing about this is that I'm more of a visual guy. If i was there looking at it i would be more of a help.

So you have the engine, harness, and ecm. Which sensors are you referring to?

If you could take pictures and upload them that would help allot. Btw I'm doing this from my phone out in the field while working. Just taking a break from welding to have a cigarette for a few minutes.

So if i don't get back to you soon I'm sure someone else around here will be glad to help you.


Posted from Honda-tech.com App for Android

 

Ok thats the thing. There are 12 loose wires in
The jumper harness & the paper work that came
With it says 1 wire hooks up to the vtec solenoid signal
wire & 1 hooks up to the vtec pressure switch signal
Wire, 1 hooks up to the intake air bypass signal wire
1 hooks up to the knock sensor signal wire
4 hook up to the o2 sensor but those I know where
They are :-) the rest are easy

 

But no pictures showing
where the sensors are so I can trace the wires
To the plugs

 

you dont need to do anything.. the 94 and 95 accord motors are obd1.. so the ckp is in the dizzy just as your 90 accord is..meaning the oil pump does not have the sensors on it.

swap you full engine harness form your 90 motor, you should be able to use your existing distributor since all f motors have the same bolt pattern

then youll just need to add the wires for vtec and such... and use a obd1 ecu and injectors that match that ecu

 

so to clarify, sorry i typed that a little fast.
since this is a 90 obd1 car and a 94 obd1 motor, its very easy
put your existing harness onto the new motor, use you distributor to match your harness plugs to the dizzy..
if you received the 94 f22b1 ecu as well, use those injectors and just add the wiring for vtec and MAYBE the knock sensor but i dont think the f22b1 has a knock sensor in 94.

if you dont have the matching vtec ecu, reuse your injectors and ecu, and the car will run just fine until you get a vtec ecu

 

oh and the obd0 to 0bd1 harness is not needed, your car, if it is 1990 is obd1.. the last obd0 accord was in 1989. so you dont need that harness..

unless the information i have is wrong

 

Ok now really confused first off what the hell
Is a DIZZY & a ckp ?
next why the 90 nonvtec dist. instead of the
94 vtec dist.
3rd what wires hook to what for the vtec, I want
The full benifits & power of the vtec motor
Thats why I bought that complete motor, I got
Everything with it complete intake, exhaust manifold,
Wiring, dist., even plug wires
4th I have both ecu's 90 & 94
Last off thanks for the help.

 

Dizzy is short for distributor. Use what came with the new one.. I keep thinking your motor is obd2. Since its obd1 it'll plug into your harness.
Ckp is crank position sensor.. its in the distributor. On obd2 its behind the crank pulley.

 

And use the VTEC ecu.. now wiring.. look up a h22 swap and you'll see.. VTEC motors have extra wires you will need to add from the ecu to the harness plug... not too much work.. but if you don't it will not work and you'll have a check engine light

 

Im old school from the old carbed V-8 school so
I get lost with all the sensors & wires
but im not to old to learn if I see it
I can do it

 

Will it show what pins on ecu need to hook up to
What & where they are on the engine ?
Thats where ill need the help

 

Yeah. Its the solenoid that's next to the distributor on the new motor.. and yes the pin outs are there

 

it's going to be plug and play with the b1 ecu, you don't even need to switch harnesses at all....You just need a vtec wiring kit from axidworks(unless you want to wire it yourself) and you're good to go

You will just run the vtec solenoid and vtec pressure switch to your existing ecu connector and open the back of the connector up and slide the pins in and then close the back of the connector and that's it

that engine doesn't have a knock sensor

 

oh, I forgot you need to swap pins A6 and A11 somewhere near the ecu connectors. Some people are able to depin the pins from the connectors but I've tried this and I have never been able to do it and almost damaged my connectors so it might be best to just cut em out of the connectors and swap em outside the connector

 

Thanks I look up axidworks tomorrow

 

Ok just ordered the vtec harness from axidworks
Just now for 39.99 they were very helpful. Will
Post if I have any questions, & Thanks Again

 

does the 90-93 accord share the same harness plugs as the 94-97? i thought the harness plugs in the engine bay were different

 

I don't have the engine in yet but they look the
Same, will post if I have any problems once I
Get there just getting everything ordered &
On hand before I do the swap

 

Thanks for the tech info it will be helpful

 

no problem.. i just recommend when you get the motor compare the plugs to what you have.. and go from there...

its really not that big of a deal

 

Tks

 

You won't need to change the harness at all. Just use your existing harness and swap the two pins I said near the ecu connectors somewhere and just add the two vtec wires through the firewall. There's a rubber grommit you can just pop out. For some reason the 94-97 accords have those two pins switched. No other obd1 hondas have it that way. ergo, since you're using your existing harness you will just need to swap those two pins.