so close, Anyone care to comment?

[blackgst256]

Come on wiseman and proven members i know you can help me throguh my time of need. OK I have been fighting with this things for way to long now and i have narrowed down my search to this. I did a 6boltswap to my car and i finally got it running but it runs like garbage at half power. Did a whole bunch of tests, swapping parts and everything to get to this. For some reason cylinder 1 and 3 have fuel cause i tested the injector harness and the injectors and i have power in the harness and when i manually ran the injectors with the tester they fired. They also have spark so no worry there. But if i unplug either of the two while the car is running it doesnt effect it at all, but if i take off 2 or 4 it will get choppy and die. This also puzzles me because the two that are not working are on to different coils. So im guessing a signal is missing somewhere. If i left out any info you need let me know or if something doesnt make sense im sorry i just have had it with this swap and im about to drive it into the river if I cant find out whats going on. Oh its also wired correctly as it says on the magnus site. Thanks

 

[blackgst256]

Sorry oldman. We checked all 4 plug wires off the plugs and all 4 of them had spark

 

[peypey's ride]

Call me retarded, but he said that his car had a half tank for 6 months, he added solvent to it to help with the water in the tank. Maybe his fuel filter is clogged and maybe it clogged two of his injectors? Maybe???

 

[oldman]

Sorry oldman. We checked all 4 plug wires off the plugs and all 4 of them had spark

I know, that's why I was wondering why you asked the question in post# 22.

For shits and giggles, swap wires 1 and 3 and see what happens. Also, I checked out your profile, you're running pig rich at idle due to FPR overrun. What are your SAFC settings for the 550s?

 

[blackgst256]

I forget exactly what it was but i think it was like a dry gas thing? I swapped the injectors on 1 and 3 with two other ones i had left over because my friend with the supra gave me all 6 550's he used on his car for about 5 minutes until he went to his dual pumps with 1000cc injectors

 

[MountainDew]

Call me retarded, but he said that his car had a half tank for 6 months, he added solvent to it to help with the water in the tank. Maybe his fuel filter is clogged and maybe it clogged two of his injectors? Maybe???

It definitely wouldn't hurt to look at replacing. Pretty easy job/cheap to do that probably needs to be done anyways.

I'm kind of running out of ideas here. Running on 2 cylinders, but all 4 have spark? How are you testing for spark? Crank with no wires attached looking for arching?

Also dunno if I missed it, but do you have an aftermarket fuel pump? If so, might wanna make sure everything is wired, grounded and relayed correctly.

 

[blackgst256]

If i unplug the injector harness on either one while the cars running it doesnt effect it at all even if i take both off at the same time and only have 2 and 4 plugged in it runs the same??? I have an aeromotive fpr if that helps, and i have my settings on my afc at i think -10 across. With my tune before with my 7bolt it was -16 across so i just bumped it down some with this motor because i didnt know what would happen with the different cams and other mods.

 

[blackgst256]

I replaced the filter during the motor swap something i thought ahead of. I do have a 255pump that i could check although i have not touched it during the swap and it gets good fuel pressure so idk if that would be the case. Yeah i tested for spark cranking with no wires attached. all 4 we going fine

 

[MountainDew]

Any way you could take the "good" injector harnesses and put them on the cylinders that aren't running? That could maybe help further diagnose this and tell us something. Basically just switch 2 and 4 with 1 and 3 on the injector harnesses. If it does the same on those 2 cylinders, then you know it's related to that pair of harnesses. Something electrical. If it does nothing... bad injectors maybe? Although I remember reading you have 6 of them off a Supra.

 

[blackgst256]

Also with the car running i pulled 1 and 3 out and they were sparking found out the right and wrong way to do that though cause it sent a nice shock up my arm.

 

[oldman]

If i unplug the injector harness on either one while the cars running it doesnt effect it at all even if i take both off at the same time and only have 2 and 4 plugged in it runs the same???

Remove all the plugs and crank the car as if you're doing a compression test, pay attention to 1 and 3 for fuel.

I have an aeromotive fpr if that helps

What is it set to?

, and i have my settings on my afc at i think -10 across. With my tune before with my 7bolt it was -16 across so i just bumped it down some with this motor because i didnt know what would happen with the different cams and other mods.

-10 is pretty rich, you should be at about -18.

 

[blackgst256]

yeah my friend bought rc 550's and used them for 2 days until he upgraded so they were fine when i put them in, and they were in my car when i got it dynoed and ran fine for a few months till the motor took a dive. ill defintily try swapping the 2,4 and 1,3 and see what happens that would tell me that it must be the harness if it works right

 

[MountainDew]

yeah my friend bought rc 550's and used them for 2 days until he upgraded so they were fine when i put them in, and they were in my car when i got it dynoed and ran fine for a few months till the motor took a dive. ill defintily try swapping the 2,4 and 1,3 and see what happens that would tell me that it must be the harness if it works right

Give that a shot and report back here. I'm going to bed, best of luck man.

P.S. Might wanna work on using better grammar before the oldman swallows the keys.

 

[blackgst256]

Fuel pressure is right under 40, The plugs are gapped correctly and i have 2 sets and tried both of them. i think .28? Yes i did the whole rewiring job. Is -18 safe to do without a dyno tune or wideband? I really need one but would it matter that much to lean out with a proper tune while driving

 

[oldman]

Fuel pressure is right under 40,

Is that with or without the vacuum lines hooked up?

Is -18 safe to do without a dyno tune or wideband? I really need one but would it matter that much to lean out with a proper tune while driving

Are you trying to say you don't even have a logger?

 

[blackgst256]

That is with the line on, and my logger is as messed up for some reason it doesn't work at all. It worked fine before but as fate would have it when I need it, It dies

 

[oldman]

That is with the line on,

Then I would say your base pressure is set too high unless you're only pulling less than -10 in HG of vacuum at idle, pull the line off and find out what your base pressure is.

and my logger is as messed up for some reason it doesn't work at all. It worked fine before but as fate would have it when I need it, It dies

Get it working, you can't be messing with fuel without any proper monitoring device.

 

[blackgst256]

Its pulling a little over 10 at idle, but would that cause this whole issue to start in the first place? Would the fuel being off a little cause the symptom of only 2 cylinders to work when all 4 get spark? I took a look at the plugs and 1 and 3 are definitely not burning fuel, and are alot darker than 2 and 4 which look to be firing fine due to the whiter tips

 

[oldman]

Its pulling a little over 10 at idle, but would that cause this whole issue to start in the first place? Would the fuel being off a little cause the symptom of only 2 cylinders to work when all 4 get spark?

No, separate issues.

 

[blackgst256]

Is there a part of the ignition system that could fail and only make 2 and 4 fire, and cause 1 and 3 to fail? Another thing is there is no gas on the plugs so it must mean something is telling those 2 too not work?

 

[blackgst256]

Thanks guys on the response and info. Im going to try to swap my injector harness in the morning to see if it makes a difference. What do you think i should do after that if for some reason that doesnt work?

 

[blackgst256]

So i swapped out the injector wires and it did nothing at all it didn't even start. Im all out of suggestions at this point

 

[MountainDew]

So i swapped out the injector wires and it did nothing at all it didn't even start. Im all out of suggestions at this point

Well, atleast that tells us a little more now. For some reason, you aren't getting signal to those two. Or did you put the working harnesses on 2 and 4? OR did you try the 2 and 4 harnesses on the working 1 and 3 cylinders?

 

[blackgst256]

1 and 3 are not working 2 and 4 are the ones working correctly