Help Please! 92 swap into 91 si
Ok folks so Im havin a little trouble..hoping someone can help.
So basically I bought a 1991 si hatchback for 250 dollars. Then I picked up a full running swap from a 92 hatch. I ordered the sonem racing Hydro Conversion bracket. Hit the engine bay with some new clear coat. Cleaned the engine real well. I shaved the sides of the motor mounts but Im still finding it hard to get the passenger side mount to line up perfect ( ie the motor ends up being crooked :/) any help or ideas are appreciated. I did alot of research and no one sells a mount for this swap for someone who wants to keep the hydraulic tranny. i know everyones gunna say get a si or dx cable but i cannot find one for a decent price here in sacramento and cant fork out any more money for this project. someone please help me
pics..


So basically I bought a 1991 si hatchback for 250 dollars. Then I picked up a full running swap from a 92 hatch. I ordered the sonem racing Hydro Conversion bracket. Hit the engine bay with some new clear coat. Cleaned the engine real well. I shaved the sides of the motor mounts but Im still finding it hard to get the passenger side mount to line up perfect ( ie the motor ends up being crooked :/) any help or ideas are appreciated. I did alot of research and no one sells a mount for this swap for someone who wants to keep the hydraulic tranny. i know everyones gunna say get a si or dx cable but i cannot find one for a decent price here in sacramento and cant fork out any more money for this project. someone please help me
pics..


you have to use the 88-91 drivers side mount. its at a completely different angle than the 92-95 civics, you must also use the timing belt cover, unless you just remove it. search and you will see what i am talking about.
I got the driverside to bolt up..are you saying If I use the ef driverside mount itll allow the passenger side to line up? because only the passengerside mount wont work rite now
i know that there is a difference in the mounts on the drivers side for the 88-91 and the 92-95 civic. i have never put a hydro d series trans in an ef before so i wouldnt know if that mount is different. but i would imagine if you have the wrong angle on your drivers side mount it would also affect your pass side. my .02
i believe the eg mount is flat and the ef mount is tilted backwards. which way is the pass mount tilted to not allow it to line up?
i believe the eg mount is flat and the ef mount is tilted backwards. which way is the pass mount tilted to not allow it to line up?
i know that there is a difference in the mounts on the drivers side for the 88-91 and the 92-95 civic. i have never put a hydro d series trans in an ef before so i wouldnt know if that mount is different. but i would imagine if you have the wrong angle on your drivers side mount it would also affect your pass side. my .02
i believe the eg mount is flat and the ef mount is tilted backwards. which way is the pass mount tilted to not allow it to line up?
i believe the eg mount is flat and the ef mount is tilted backwards. which way is the pass mount tilted to not allow it to line up?
figured the first problem out. got a custom passenger side mount motors in the car now. now im trying to figure out how to make it run. Ive got in my possession a dpfi engine harness and a mpfi harness from a 91 si. ive also got a obd0 to obd1 jumper so i can use the 92 ECU Distributor and o2 sensor. so I can just plug the 1991 si mpfi harness into the eg intake manifold and it shuld be ok right? also the rear mounts not lining up right but the people at innovative said I could use a stock mount. any help?
updated pics..

updated pics..

bump did all the wiring moving the plugs from the d15b7 harness onto the si harness. got it sodered up and shrinked. car then wouldnt start. found i had no main relay so I went and bought one. car still wont start though. when I put the key in and turn it over no lights pop on the cluster, they only light up when I hold the key over in the start position but theres no cranking or any movement. I hear a click coming from somewhere but thats it. Just a revamp. Im using the obd1 ecu with an obd0 to obd1 ecu jumper. wired up the obd1 dizzy. I have a few plugs with no matched. pics of those tomorrow.for now any ideas? anyone in sacramento CA to lend a hand?
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It sounds like the ignition switch is bad,it is a reasonably common problem.Not the lock cylinder part but the part that attaches to that,I think about $70 from the parts store.
x2 check ur ignition switch, double check that all your engine grounds are hooked up as well as ur starter. and check to make sure all your main fuses are good under the hood
i would definitely check all the grounds before you replace your ignition switch. if you have a volt meter read the voltage at the battery to the starter btw what injectors are you using???
you can just use your si harness. keep the obd0 injectors and the resistor box and youll be fine. did this car come with an engine and trans? or was it just a shell? cause runnin a hydro d series trans seems like meaningless work instead of just using the cable trans it came with. i know you said theyre hard to find but whats the prices ppl are asking? i found my 90 si trans for 100 bucks..
an update. I put in a brand new ignition switch and main relay. still have the same problem.im using an obd0 si harness battery is good. starter and alternator are good.got all custom mounts. to make the hydro work.ive looked for two weeks on craigslist and didnt once find a ef tranny available.im pass that tho this things ready to start and drive. just wont turn over
you can just use your si harness. keep the obd0 injectors and the resistor box and youll be fine. did this car come with an engine and trans? or was it just a shell? cause runnin a hydro d series trans seems like meaningless work instead of just using the cable trans it came with. i know you said theyre hard to find but whats the prices ppl are asking? i found my 90 si trans for 100 bucks..
I'm going off the top of my head here so please, anyone else that can confirm what plugs are what, please do so and correct me on any part that I may be wrong about...
The first two plugs appear to be pre-OBD plugs for your distributor. If these two plugs are still on the harness what exactly do you have the new distributor connected to (in a previous picture you have the new OBD1 distributor plugged into the harness)?
The third plug pictured appears to be the pre-OBD connection to your under dash fuse panel (not certain if it is, anyone else chime in if you can confirm). If this is NOT connected, a bunch of stuff won't work.
The fourth picture looks like it's your reverse light switch connection.
The fifth picture I can't verify but looks like it may be the starter connectors.
The sixth picture looks like it could be anything. I'd need to verify the colors of the wires but off the top of my head and given the location my first guess would be that it's for the radiator fan (I vaguely recall my wiring to my fan being blue and black but I could be wrong).
The first two plugs appear to be pre-OBD plugs for your distributor. If these two plugs are still on the harness what exactly do you have the new distributor connected to (in a previous picture you have the new OBD1 distributor plugged into the harness)?
The third plug pictured appears to be the pre-OBD connection to your under dash fuse panel (not certain if it is, anyone else chime in if you can confirm). If this is NOT connected, a bunch of stuff won't work.
The fourth picture looks like it's your reverse light switch connection.
The fifth picture I can't verify but looks like it may be the starter connectors.
The sixth picture looks like it could be anything. I'd need to verify the colors of the wires but off the top of my head and given the location my first guess would be that it's for the radiator fan (I vaguely recall my wiring to my fan being blue and black but I could be wrong).
I'm going off the top of my head here so please, anyone else that can confirm what plugs are what, please do so and correct me on any part that I may be wrong about...
The first two plugs appear to be pre-OBD plugs for your distributor. If these two plugs are still on the harness what exactly do you have the new distributor connected to (in a previous picture you have the new OBD1 distributor plugged into the harness)?
The third plug pictured appears to be the pre-OBD connection to your under dash fuse panel (not certain if it is, anyone else chime in if you can confirm). If this is NOT connected, a bunch of stuff won't work.
The fourth picture looks like it's your reverse light switch connection.
The fifth picture I can't verify but looks like it may be the starter connectors.
The sixth picture looks like it could be anything. I'd need to verify the colors of the wires but off the top of my head and given the location my first guess would be that it's for the radiator fan (I vaguely recall my wiring to my fan being blue and black but I could be wrong).
The first two plugs appear to be pre-OBD plugs for your distributor. If these two plugs are still on the harness what exactly do you have the new distributor connected to (in a previous picture you have the new OBD1 distributor plugged into the harness)?
The third plug pictured appears to be the pre-OBD connection to your under dash fuse panel (not certain if it is, anyone else chime in if you can confirm). If this is NOT connected, a bunch of stuff won't work.
The fourth picture looks like it's your reverse light switch connection.
The fifth picture I can't verify but looks like it may be the starter connectors.
The sixth picture looks like it could be anything. I'd need to verify the colors of the wires but off the top of my head and given the location my first guess would be that it's for the radiator fan (I vaguely recall my wiring to my fan being blue and black but I could be wrong).
the third plug is on the body harness but I found no engine harness that plugs into it.which threw me for a loop.
I was pretty sure the fourth was reverse lights. (thanks for confirming that)
the fifth is not starter wires. my starter has a ground connection with a nut over it and a small ground to the starter solenoid.

and again with the 6th. im also sure its fan plug just wanted to double check.
anyone else have some ideas?
the first plus has two wires. both are blue with a red stripe
the second has 6 wires a yellow wire a brown wire a light blue wire and a red wire and a white wire. it also has a yellow wire with a black stripe goin to the injector resistor box.
the third plug has 9 wires a yellow and black stripe. a black with a yellow stripe.a yellow wire. a blue wire. a brown wire. a red wire. a blue with yellow stripe wire. a light blue wire and a black wire.
the 6th plug has two wires. one blue and one fat black wire with a yellow stripe..
hope this helps you to help me
Ok, first plug is possibly AC component related. According to the diagram it should have a blue/red and a yellow going to B8 and B3 (respectively) on the ECU plug. If you have a multimeter handy check for continuity to confirm if those wires go to those pin locations. I'm not sure why it has two blue/red wires though, maybe there's a relay or something I'm not seeing on the diagram but I'll double check.
Second plug, all wire colors match up except for one on the diagram I'm looking at but it would seem that the second plug is just for your fuel injector wire harness and the other corresponding end should be on the engine harness (it's corresponding plug should go straight to the ECU). To be perfectly honest, my car is a converted DPFI>MPFI car so I've never actually seen this plug before but I'll check it against my friend's Si tomorrow.
That's all I have for now, still checking on the third plug.
Again, if anyone finds my info incorrect please say so.
Second plug, all wire colors match up except for one on the diagram I'm looking at but it would seem that the second plug is just for your fuel injector wire harness and the other corresponding end should be on the engine harness (it's corresponding plug should go straight to the ECU). To be perfectly honest, my car is a converted DPFI>MPFI car so I've never actually seen this plug before but I'll check it against my friend's Si tomorrow.
That's all I have for now, still checking on the third plug.
Again, if anyone finds my info incorrect please say so.
Ok, first plug is possibly AC component related. According to the diagram it should have a blue/red and a yellow going to B8 and B3 on the ECU plug. If you have a multimeter handy check for continuity to confirm if those wires go to those pin locations.
Second plug, all wire colors match up except for one on the diagram I'm looking at but it would seem that the second plug is just for your fuel injector wire harness and the other corresponding end should be on the engine harness (it's corresponding plug should go straight to the ECU). To be perfectly honest, my car is a converted DPFI>MPFI car so I've never actually seen this plug before but I'll check it against my friend's Si tomorrow.
That's all I have for now, still checking on the third plug.
Again, if anyone finds my info incorrect please say so.
Second plug, all wire colors match up except for one on the diagram I'm looking at but it would seem that the second plug is just for your fuel injector wire harness and the other corresponding end should be on the engine harness (it's corresponding plug should go straight to the ECU). To be perfectly honest, my car is a converted DPFI>MPFI car so I've never actually seen this plug before but I'll check it against my friend's Si tomorrow.
That's all I have for now, still checking on the third plug.
Again, if anyone finds my info incorrect please say so.
Just to clarify on the third plug, in the picture it appears to only have 8 pins but you say there are 9 wires. Are two wires going to a single pin? Or am I not seeing the plug correctly and there are 9 individual pins?
Quick update, first plug, pressure switch for AC system. Should be located near the bottom of the engine bay. If you're not running AC then I guess that connector isn't critical at the moment (I believe mine is just tucked away with a ziptie, I had my AC removed years ago).
I'm at a complete loss for the third plug, I just looked outside at my car and I don't see anything like it. I'll look again when I wake up.
I'm at a complete loss for the third plug, I just looked outside at my car and I don't see anything like it. I'll look again when I wake up.
found out what the ****s goin on. apparantly the 88 si harness is different from a 89-91 si engine harness. the 88 came with a extra 6 wire plug. the 89-91 came with a round plug. thus my dilema with pics 2 and three. so now I have ti find the right harness.fml
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C00kiemunstr
Honda CRX / EF Civic (1988 - 1991)
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Oct 11, 2008 08:59 AM










