Help on a JDM engine swap
I am helping my 19 year old son swap in a 88 JDM turbo/5spd into a 91 non turbo auto, for insurance reasons. We are getting fire to the plugs and the fuel pump is working, but the injectors are not opening. We used the 88 JDM engine side of the wiring harness and the 88 JDM ECU and even tried the 91 ECU, but, no luck. All grounds and all required wires seem to be intact and connected.
|
What? Are you sure you have the years right? a 88 is a S4 and a 91 is a S5 both have entierly different ECU's and pinouts and quick connectors to the ECU. This means you rewired the pinouts using S5 connector?
|
The connectors are the same. I know the 91 is truely a 91, but not exactly sure of the 88 JDM.
|
look into rotory resurection's site it covers alot of this
|
Since your getting spark the ECU is reconizing that the engine is turning over. Check all connections involving the injectors since you spliced the harness together. Cross reference wiring harnesses from both years in the FSM, see if any of the wires changed color between the year.
|
I did not splice any wires, the JDM engine harness has the same connectors as the 91. I also used the JDM computer.
|
Originally Posted by 57bronco
I did not splice any wires, the JDM engine harness has the same connectors as the 91. I also used the JDM computer.
|
The dash harness from the 91 is not the same pin outs as the 88.
|
do you have the fuel lines hooked up the right way? On JDM motors, the fuel is routed the oppisite way from what i recall.
|
Originally Posted by iceblue
The fule lines on JDM engins are reversed. Did you hook them up right?
|
Originally Posted by 57bronco
I did not splice any wires, the JDM engine harness has the same connectors as the 91. I also used the JDM computer.
|
Help on a JDM engine swap
Originally Posted by Corbit
The dash harness from the 91 is not the same pin outs as the 88.
|
Help on a JDM engine swap
Originally Posted by Smoken'
do you have the fuel lines hooked up the right way? On JDM motors, the fuel is routed the oppisite way from what i recall.
thanks again |
Originally Posted by 57bronco
I'll try this tomorrow, thanks for all the input. I'll reply after I try this.
thanks again Word of note if it runs now. You can test and start the car on ither ECU. Do not drive it or boost it using the vert ECU. Use the apropriet ECU for the motor. Unless you have spare motors in your back yard. |
Originally Posted by 57bronco
I'll try this tomorrow, thanks for all the input. I'll reply after I try this.
thanks again |
what impedance are the injectors and are you using the correct resistors?
|
Originally Posted by FB II
what impedance are the injectors and are you using the correct resistors?
|
Pull the cap off one of the primary injectors. Take a continuity tester to them for ohm and V. Crank the car and see if the harness is even giving a signal to the injectors. If it is not I would say bad harness leads or improper pinout on the ECU for the injectors.
If you are using all S5 components as you have stated. Evrything is high imp then. You can as well try if you verify the above that the injectors are fireing using a mecanics stephascope and the continuity tester. Take a long flat screw driver and place them on the injectors. With a hammer lightly tap them as they are fireing this will normaly free up stuck injectors. They can tend to become stuck on motors that have ben siting up. |
Originally Posted by iceblue
If that does it for you :-D
Word of note if it runs now. You can test and start the car on ither ECU. Do not drive it or boost it using the vert ECU. Use the apropriet ECU for the motor. Unless you have spare motors in your back yard. sadly you are are wrong... wait not sad at all we expected it he CAN run SAFELY with the vert ECU |
Originally Posted by slpin
sadly
you are are wrong... wait not sad at all we expected it he CAN run SAFELY with the vert ECU |
yes - but it does not matter
because you CAN run the NA ECU in a turbo car and it had been done MANY times you just need common sense... and a brain... obviously, you dont want to boost 10psi with a NA ecu on 460 injectors but, there are no problems running the stock 5psi with t2 injectors |
why would you do someting the half ass way if the right way is sitting right next to you? now i would understand if that is all he had was an na ecu but from what ive read he has one na ecu and one turbo ecu.
|
so let me get this right, he is running the 88 engine harness to an s5 non turbo ecu ? does anyone see a problem in this ?
|
it wont plug in
|
Originally Posted by myexlex
so let me get this right, he is running the 88 engine harness to an s5 non turbo ecu ? does anyone see a problem in this ?
// Totaly ignoring the nonsens slpin is posting right now |
All times are GMT -5. The time now is 05:01 AM. |
© 2024 MH Sub I, LLC dba Internet Brands