GAS leaking out of turbo!!

[deviousgst]

i searched and searched and nothing.. so my problem, im working on my brothers gsx which we couldnt get the idle down under 2000, we found some leaks and got it to 1500k rpms but it wont go any lower. i even put my dsmlink ecu to it and got the sensors to the right voltage and i set the idle to 800 and still stays at 1500rpm. even if with biss screw all way down and nothing..
Okay NOW after doing more boost leak test and swapping to a good TB with good sensors( came off my running gst) i started her up and it idled really low, and i also smelt raw gas, shut her off real quick and noticed that FUEL, yes FUEL was leaking from exhaust manifold onto O2 housing..why would fuel be coming out of ex mani??

 

[Justin_l_]

Cylinder not firing could cause fuel to come out exhaust.

 

[deviousgst]

How would one id my cylinders not be firing up?..all I did was blt and swap tb and move harness out the way to make it look nicer and plugged everything back in. Maybe an Injector is staying on? Ima put some other 450's on and see if it works. Any other input would be greatly appreciated thanks

Sent from my DROIDX using Tapatalk

 

[deviousgst]

Update: i unplugged wires from plugs while car was on, one by one to see if the idle will chane and they all did except #4. So i took plugs out and cylinder 4 plug was covered in fuel so I swapped to diff spark plug wires and still leaking fuel. Swapped injectors out with some other 450's and still leaking. If I disconnect the injector clip to #4, and start it, it doesn't leak fuel..I have spark in all 4 wires.. I seem to always have the weirdest problems =[

Sent from my DROIDX using Tapatalk

 

[BurrowZ]

Swap injectors 3 & 4 and see if the leak is still at 4. I know you said you switched to different injectors but it couldn't hurt to be 100% positive your problem is in the circuit somewhere.

 

[bryanwheat]

Looks like the injector ground wire is shorted to ground and keeping it open. The ecu uses the ground side of the circuit to pulse the injector. Un-plug the ecu and do a continuity to ground on the ground side of the injector plug. If the circuit is open than it is likely a problem with the injector driver. Those 2 are pretty much your choices though, a short to ground or an injector driver. Good luck.

 

[deviousgst]

Swap injectors 3 & 4 and see if the leak is still at 4. I know you said you switched to different injectors but it couldn't hurt to be 100% positive your problem is in the circuit somewhere.

Ill try that now

Sent from my DROIDX using Tapatalk

 

[deviousgst]

Looks like the injector ground wire is shorted to ground and keeping it open. The ecu uses the ground side of the circuit to pulse the injector. Un-plug the ecu and do a continuity to ground on the ground side of the injector plug. If the circuit is open than it is likely a problem with the injector driver. Those 2 are pretty much your choices though, a short to ground or an injector driver. Good luck.

I will also try this. Maybe its something to do with harness because the guy who had this car before ran link and other stuff and I remember me and my bro had to rewire injector #4 harness because previous ownerran only ran a single wire to this clip, not sure what he did

Sent from my DROIDX using Tapatalk

 

[bryanwheat]

I will asking try this. Maybe its something to do with harness because the guy who had this car before ran link and other stuff and I remember me and my bro had to rewire injector #4 harness because previous ownerran only ran a single wire to this clip, not sure what he did

Sent from my DROIDX using Tapatalk

Yeah, sounds like the wire is bare somewhere and grounding to something.

 

[deviousgst]

Okay, I checked to make sure
My soldering wire on injector 4 at ecu didn't come apart and also checked that on the injector clip wires I soldered together also didn't come apart. Well there still intact together..where does the ground from injector clip ground out to?
Sent from my DROIDX using Tapatalk

 

[bryanwheat]

The ecu grounds it, the power is a constant power that comes from the resistor pack. Do you have a multimeter?

 

[deviousgst]

The ecu grounds it, the power is a constant power that comes from the resistor pack. Do you have a multimeter?

Yes I do

Sent from my DROIDX using Tapatalk

 

[bryanwheat]

Check the ground side of the injector harness for continuity to ground with the ecu unhooked.

 

[deviousgst]

Check the ground side of the injector harness for continuity to ground with the ecu unhooked.

Okay, I got 9.83..Idk if I did it right, but I put the power from multimeter to positive on battery and the negative on the ground wire on injector clip harness. Is that right?

 

[bryanwheat]

You aren't measuring voltage, you are measuring for resistance. Set the multimeter to the 200 or 2k setting and touch the negative to the body or engine, and the positive to the negative wire on the injector. The negative is the one that is a different color on each injector. The positive will all be the same color. By doing this you are checking to see if there is a connection in that wire to anywhere in the body, which there shouldn't be. Did you unplug the ecu also? You will need it unplugged so the circuit remains open.

 

[kidtsi]

When this happenned to me one of my exhaust valves was cracked, check for that also.

 

[deviousgst]

You aren't measuring voltage, you are measuring for resistance. Set the multimeter to the 200 or 2k setting and touch the negative to the body or engine, and the positive to the negative wire on the injector. The negative is the one that is a different color on each injector. The positive will all be the same color. By doing this you are checking to see if there is a connection in that wire to anywhere in the body, which there shouldn't be. Did you unplug the ecu also? You will need it unplugged so the circuit remains open.

Okay well let me get another one. The one I have is an automatic one..

Okay well I got another one and it has different settings of 200 and 2k....its reading 005 ?

Sent from my DROIDX using Tapatalk

 

[bryanwheat]

If it's actually reading something with the ecu unhooked than you have a short to the engine or body. IT should be a completely open circuit. Check all the others to compare it to what you are getting.

 

[deviousgst]

If it's actually reading something with the ecu unhooked than you have a short to the engine or body. IT should be a completely open circuit. Check all the others to compare it to what you are getting.

I checked all other injector plugs and I get the same thing 004-006

Sent from my DROIDX using Tapatalk

 

[bryanwheat]

You are testing the positive side of the lead then. There should no continuity to ground in the wire with the ecu not hooked up.

 

[deviousgst]

You are testing the positive side of the lead then. There should no continuity to ground in the wire with the ecu not hooked up.

Update. So I rechecked the resistance again and it was all zero.. I took injector 4 clip out and connected it to a spare injector and it wouldn't pulse. I did the same for all other clips and it would pulse..I even checked to see if I had a solid ground from injector clip to resistor plug on all 4 prongs and I did. It just doesn't make sense

Sent from my DROIDX using Tapatalk

 

[bryanwheat]

Sounds like an injector driver at this point. If it is just holding the injector than the wire is grounded out permanently in the ecu.

 

[deviousgst]

Sounds like an injector driver at this point. If it is just holding the injector than the wire is grounded out permanently in the ecu.

Ok, so ran a wire from the ecu to injector clip and still Nothin..=[

Sent from my DROIDX using Tapatalk

 

[bryanwheat]

Check for resistance with the ecu plugged in and i would be willing to bet that number 4 is the only one that has resistance.

 

[deviousgst]

Check for resistance with the ecu plugged in and i would be willing to bet that number 4 is the only one that has resistance.

Just checked and non have any..unless I have the multimeter on wrong setting

Update..I take that back. Your right only number four wire(one that goes straight to ecu) has 004-002 and other ones are "1" which means nothin
Sent from my DROIDX using Tapatalk