32 Gtr No Start, Injectors No Fire

[RB30 Ceffy]

Hey guys. I just finished tossing in a new R33 26 into a 32 GTR my brother blew up a year ago. Got everything in okay and all hooked up. Ive got plenty of fuel to the rail but the injectors wont fire. The engine that was in the car before blew up from a lean hit and smashed all the rings. I figured it was from a bad shot of fuel or lack of fuel and it was summer time too. I didnt figure that was a problem with this engine conversion and maby not. Maby im missing something simple but everything is hooked up like it should be. ANY help or a point in another direction is helpfull. Thanks guys!!!

Edited March 21, 2007 by RB30 Ceffy

[700HP-GTR33]

Check your fuel pressure.....more than likely the Fuel pump caused the blow up of the first motor.

Was the motor working prior to the install....could have seized up...try turning manually.

Check also if there is power through the ignitor box...and spark is occuring.

Did you plug in the computer......could be loose.

Their can be many reasons for this.......you need to go through all the steps.

Hope I have been of some help.

Cheers.

[blind_elk]

The injectors run a constant +12V, and the ECU switches them to earth.

Did you have the injectors checked and cleaned prior to installation of the engine?

[RB30 Ceffy]

Hey thanks for that but I have already done those above steps. The pump is working good and I still get 43 PSI. When my brother blew the engine a year ago he drove the car home with blow-by shooting out the ketch can . The car still ran when the engine was blows but just barely as there was no compression.

I do have spark. There is no problem with the ignition system.

I have also swapped to 3 different GTR ecu's I’ve got kicking around and that didn’t change anything.

I pulled this engine from a running car and did compression tests in Japan before I pulled it and shipped it to Canada. So I know the engine is good and it turns over no problems J

What I have done in the past hour or 2 was read up on a service manual. Then did the fallowing:

I checked my drop resistors and that is fine at .006 k ohms ea. I had two of these kicking around too and tried them all and same results and still no start as well.

Then I checked the ECU pin-outs and this is where I get stumped. In the manual it says injectors 1,2,3,4,5,and 6 are pin outs 101,105,103,114,110 and 112 Now some of these pin outs are empty slots. This got me all mixed up so I kept reading and found "injector power supply" pin out109 and I did a continuity test and did find a signal from the ECU to the injector clip wire 2.

I then measured for voltage from injector clip wire 1 to ground with ign on and off and got 12V with both tests. I thought while doing this I would do the same test with injector clip wire number 2 and noticed the voltage kind of kept dropping off but while cranking got about .7 volts and stay there while cranking. I threw on a light as well while cranking and it would not have any light pulse so right there I know something not right.

I’m not a brain scientist to this stuff. I’m always looking to get smarter at what I am doing but this has got me a bit stumped working on it on my own. I figure there is something wrong with the ECCS relay maybe but I don’t know where this is located on a 32 GTR to even check on that…or the injector grounds from the ecu since wire 2 on the injector clip wont ground while cranking and just stays at .7 volts. These 2 things I do not know how to do or diagnose. If you guys agree with me on these 2 things can you please tell me what I can do or if by what I’m telling you you can shed some light on my problem. Thanks!!! I figure the problem could be one of two things. One beingHey thanks for that but I have already done those above steps. The pump is working good and I still get 43 PSI. When my brother blew the engine a year ago he drove the car home with blow-by shooting out the ketch can . The car still ran when the engine was blows but just barely as there was no compression.

I do have spark. There is no problem with the ignition system.

I have also swapped to 3 different GTR ecu's I’ve got kicking around and that didn’t change anything.

I pulled this engine from a running car and did compression tests in Japan before I pulled it and shipped it to Canada. So I know the engine is good and it turns over no problems J

What I have done in the past hour or 2 was read up on a service manual. Then did the fallowing:

I checked my drop resistors and that is fine at .006 k ohms ea. I had two of these kicking around too and tried them all and same results and still no start as well.

Then I checked the ECU pin-outs and this is where I get stumped. In the manual it says injectors 1,2,3,4,5,and 6 are pin outs 101,105,103,114,110 and 112 Now some of these pin outs are empty slots. This got me all mixed up so I kept reading and found "injector power supply" pin out109 and I did a continuity test and did find a signal from the ECU to the injector clip wire 2.

I then measured for voltage from injector clip wire 1 to ground with ign on and off and got 12V with both tests. I thought while doing this I would do the same test with injector clip wire number 2 and noticed the voltage kind of kept dropping off but while cranking got about .7 volts and stay there while cranking. I threw on a light as well while cranking and it would not have any light pulse so right there I know something not right.

I’m not a brain scientist to this stuff. I’m always looking to get smarter at what I am doing but this has got me a bit stumped working on it on my own. I figure there is something wrong with the ECCS relay maybe but I don’t know where this is located on a 32 GTR to even check on that…. or can maybe be the voltage supply to the injectors from the ECU or the injector grounds. These 3 things I do not know how to do or diagnose. If you guys agree with me on these 3 things can you please tell me what I can do or if by what I’m telling you you can shed some light on my problem. Thanks!!!

Hey thanks for that but I have already done those above steps. The pump is working good and I still get 43 PSI. When my brother blew the engine a year ago he drove the car home with blow-by shooting out the ketch can . The car still ran when the engine was blows but just barely as there was no compression.

I do have spark. There is no problem with the ignition system.

I have also swapped to 3 different GTR ecu's I’ve got kicking around and that didn’t change anything.

I pulled this engine from a running car and did compression tests in Japan before I pulled it and shipped it to Canada. So I know the engine is good and it turns over no problems J

What I have done in the past hour or 2 was read up on a service manual. Then did the fallowing:

I checked my drop resistors and that is fine at .006 k ohms ea. I had two of these kicking around too and tried them all and same results and still no start as well.

Then I checked the ECU pin-outs and this is where I get stumped. In the manual it says injectors 1,2,3,4,5,and 6 are pin outs 101,105,103,114,110 and 112 Now some of these pin outs are empty slots. This got me all mixed up so I kept reading and found "injector power supply" pin out109 and I did a continuity test and did find a signal from the ECU to the injector clip wire 2.

I then measured for voltage from injector clip wire 1 to ground with ign on and off and got 12V with both tests. I thought while doing this I would do the same test with injector clip wire number 2 and noticed the voltage kind of kept dropping off but while cranking got about .7 volts and stay there while cranking. I threw on a light as well while cranking and it would not have any light pulse so right there I know something not right.

I’m not a brain scientist to this stuff. I’m always looking to get smarter at what I am doing but this has got me a bit stumped working on it on my own. I figure there is something wrong with the ECCS C/U power supply circut signal??? or the injector grounds. These 3 things I do not know how to do or diagnose. If you guys agree with me on these 3 things can you please tell me what I can do or if by what I’m telling you you can shed some light on my problem. Thanks!!!

Edited March 20, 2007 by RB30 Ceffy

[RB30 Ceffy]

ohh one other thing I guess I could have a broken wire in the harness causing me all these problems. I do have another one but would like to fix the problem than just toss one out that I can fix.

[RB30 Ceffy]

The injectors run a constant +12V, and the ECU switches them to earth.

Did you have the injectors checked and cleaned prior to installation of the engine?

No I didnt have the injectors flow tested. I was going to before install but was in a rush to get this car back on the road for some fun. Ive got a set geting checked right now but wont be ready for a day. I didnt factor that in as this problem as I ran and drove this engine while in Japan so I was just going to swap to flowed injectors later this week after I get a chance to run the oil in before a change.

[RB30 Ceffy]

just did another test cuz it was in the manual

I checked resistance between injector clip wire 1 to wire 1 on resistor plug and got 0ohms as said I would get in the manual. This looks to be good for all injectors.

I also checked resistance on the injectors on themselves just to make sure and I got 2 ohms so this looks good aswell

Edited March 20, 2007 by RB30 Ceffy

[Craved]

did you use the engine loom from the 33 or the original 32 one?

oh and when you checked teh pulsing of the injectors with a light, was it a LED test light? since a std test light wont work on injectors.

and you made sure the fuel lines are on the correct way around.. just to make sure

[RB30 Ceffy]

did you use the engine loom from the 33 or the original 32 one?

oh and when you checked teh pulsing of the injectors with a light, was it a LED test light? since a std test light wont work on injectors.

and you made sure the fuel lines are on the correct way around.. just to make sure

I am using the R32 engine loom. I didnt think there was any differences other than the obvious like oil pressure sending unit, A/C and that was about it.

One thing that was also different from the R32 26 and the R33 was that the gas lines flow like normal but on the return line just off the factory FPR pressure reg there is another smaller one. All I know is that line in off the filter goes to the rail and then goes past the factory FPR. Unless this is different than the S13/R32's??? What is this other regulator for under the mani???? But anyways I hooked the lines up backwards a few years back and figured it out after that. I even pulled out a injector off the rail just to make sure there was pressure at the rail and there was plenty of that cuz my arm got a good splash

[RB30 Ceffy]

ohh and another thing. I was pinning the no.2 pin on the injector clip and the pins that are in the FSM are wrong. I pinned them like below.

PIN no.2 injector clip:

-inj 1. pin 109

-inj 2. pin 113

-inj 3. pin 111

-inj 4. pin 106

-inj 5. pin 102

-inj 6. pin 104

Anyone know why the info in the FSM is wonrg??? I know its not just this car cuz I tested another R32 GTR harness I got and it was the same

And Pin no.1 on the injector clip is located on the harness thats attached to the cars harness. Its by the 2 clips by the air flow meters. Its the black one. I have no idea where they go from there if anyone knows Id like to know to further get my hands dirty

[RB30 Ceffy]

OKAY

I was starting to wonder why all the pins were good and I was still having a problem. The bulb I was using to check for the pulse was a 12V side marker bulb. I tossed my test light on and everything looked good so I knew it had to be bad injectors which seemed weird. So I called up a friend and he told me to jump 12V from a spare battery to the injectors to pop them and that did the trick. Car started up first crank.

Ive got some injectors at the shop and going to wait a day till there done and I can use something thats been flow tested so I dont have another good car blow up on me Thanks for your guys's help

Lesson learned