97 civic v-tech swap gone bad Help

[bradsonthego]

I have a 97 civic I picked up that had a 92 v-tech head swap in it that smoked and barely ran. I want to put the 98 integra motor I have in it but have run into an ECU issue. The car had an OBD I ecu in it to run the V-Tech. What ECU'S can I use to run the OBD II Integra motor in my civic EX. The integra wiring harness is a complete body and engine harness were as the civic harness is separate body and engine harnesses. Can you even run a OBD II motor with a OBD I ECU without doing major changes? And finally shouldn't this Integra motor [ 1.8 ] swap in easily?
Thanks in advance for any help you can provide!!
Brad

 

[RHDism]

V "tech" ..

Keep the stock harness for the 97.
Obtain a p72 ECU , if the B series (integra) motor is VTEC.
If the 97 is other than an EX, VTEC pressure and solenoid wires will need to be added.

Yes, its a fairly simple swap. Providing you have the skeel and parts on hand.

Include some more specifics..To get a specific answer.

 

[bradsonthego]

The civic is an EX but it has had conversion work done on it before my time and the work was shottie at best. (I found a temp. sensor screwed into the side of the back motor mount.). There are no numbers on the ECU so I haven't been able to identify it but I assume it is and OBD I as the motor is a 92 with a V-Tech head added on after the fact. I am not interested at this point in anything other than making the Integra motor run and it is Not a V-Tech motor and is a 98 model. So my primary question is what ECU can I get that will adapt the Integra motor to my 97 Civic EX with as little problem and expense as reasonably possible and not sacrifice the performance terribly.
Brad

 

[RHDism]

So it seems someone swapped an OBD1 motor in your 97 (OBD2 car).
The temp sensor you are assuming, might be a bypass for the knock sensor, (they look alike) which also clues this civic is using its OG harness. Look for a jumper harness where your ECU is mounted and that should distinguish if its a OBD1 ECU or not. If I were to guess.. its the stock ecu for that car . p2p

The factory ECU for that 98 non vtec integra motor;;;
P75 : 96-00 OBD-2 Integra LS/GS

Assumingly you have the axels,shift linkage and tranny along with that integra motor, you will just need Bseries conversion mounts for your EK. 99-00 civic Si mounts should do the job as well.

Where are you located?
Pictures are always encouraged. It beats shooting in the dark.

 

[bradsonthego]

V-Tech Swap gone bad

The Integra motor with the Civic manual tranny have been installed and most all connections where plug & play. I do have the Integra P75 ECU but the car has no fuel delivery from the pump and no spark. The pump has been tested and works fine by running a jumper power lead to it but will not operate on it's on thru the key operation. I have tried the original ECU and the P75. Neither works. I checked and there is no jumper harness but the previous owner has butchered the wiring. There are half a dozen cut and bare wire leads with an added wire that was connected to the head of the old motor that I assume was for the V-Tech head that was added.. I have in fact done a few motor swaps but never in a Honda my experience lies in the MR2 swapping the Camry V-6 3.0 into it, so I am somewhat familiar with swaps, modifications and fabricating but not with the individual idiosyncrasies of the V=Tech and Honda particulars. Is the Integra motor not a twin for the Civic Motor? If not what are the differences and how can you run a 92 motor that is OBD I on a 97 OBD II ECU without a major change in wiring and/or sensors? I have never heard of such as the two systems are like trying to run windows Microsoft on a computer that has a Lennox operating system.

 

[bradsonthego]

I had to take a break but I am back and still have no fuel delivery and no spark from the p75 ECU. To whom ever was giving direction to last week I am in Tucson AZ. in the warm wonderland of 110 degree perfect weather...... for staying inside with the A/C on high...
Any way your help has been appreciated and I know I am just this.... close to driving again..
Thanx

The Integra motor with the Civic manual tranny have been installed and most all connections where plug & play. I do have the Integra P75 ECU but the car has no fuel delivery from the pump and no spark. The pump has been tested and works fine by running a jumper power lead to it but will not operate on it's on thru the key operation. I have tried the original ECU and the P75. Neither works. I checked and there is no jumper harness but the previous owner has butchered the wiring. There are half a dozen cut and bare wire leads with an added wire that was connected to the head of the old motor that I assume was for the V-Tech head that was added.. I have in fact done a few motor swaps but never in a Honda my experience lies in the MR2 swapping the Camry V-6 3.0 into it, so I am somewhat familiar with swaps, modifications and fabricating but not with the individual idiosyncrasies of the V=Tech and Honda particulars. Is the Integra motor not a twin for the Civic Motor? If not what are the differences and how can you run a 92 motor that is OBD I on a 97 OBD II ECU without a major change in wiring and/or sensors? I have never heard of such as the two systems are like trying to run windows Microsoft on a computer that has a Lennox operating system

 

[K2e2vin]

Test the main relay. Does the fuel pump prime at all?

As far as Hondas go, an OBDII ECU would work on a OBD1 engine. Only thing the OBD1 engines lack that the OBDII engines had is a knock sensor and second O2 sensor; but since it's just a head swap that would not be an issue at all(the original D16Y8 head has the same hardware as the older D16Z6 head).

All 96-00 Civic EXs already have VTEC. A head swap from a 92-95 SOHC VTEC would be a bolt-on affair.

 

[RHDism]

Very good info ^^

Here are some links that might help as well...

civic main relay test

In case you need to KS bypass>>
Knock Sensor bypass - HondaSwap Forums

 

[Ethan]

no spark or fuel.. thermostat ground?