oo7arkman

iTrader: (2)

Ok... I am stuck. I need some help from someone outside my little box b/c I think I am overlooking something stupid.

A few weeks ago I started the car and smelled fuel. Got out, popped the hood, I see fuel on both my secondary injectors. Shut the car down, disconnect battery and it sat for a couple weeks until I picked up a few new orings. I install the new orings (I did all injectors b/c I might as well...), purge the air out of the lines, and start the car. It starts up no problem but when I went to bump the throttle it stalled. Thinking I missed some air, I purged the lines again, started it up and same issue. It starts back up easily, I can rev it slowly up to 4k but as soon as I go over 4k it will stall just like if I bump the throttle.. Sounds like something to do with the secondaries??

I am at a loss...

So far I have:
1) rechecked all work done
2) repurged air out of fuel lines
3) checked TPS settings
4) checked fuel pressure
5) chekced fuel pump
6) checked for any air leaks near LIM, UIM, TB, elbow
7) Made sure secondary injectors work when I had them out for the 2nd time (9v battery)

What am I missing??!?! The car has run just fine for years and did so right before I had to replace the orings. I know that everytime an issue like this arises it is 99.9% associated with the work that was just performed but I think I have looked at it so many times I am missing something stupid.

Also, secondary concern. When checking the fuel pump (mine is rewired) my power and ground wires that go to the pump had gasoline on them at the clip that is outside the fuel tank. Anyone ever see this. It is like the gas is wicking up the wires.

I need help from the experts. Thank you in advance.

DaleClark

iTrader: (55)

Your secondaries aren't coming online, you're not getting fuel out of them. Either the plugs to them are boogered up from unplugging or they're not plugged in good or something.

It's not going to be something exotic, it's going to be something you touched in the process.

BTW, you don't have to "repurge" the air out of the fuel lines. It's not like brake lines, basically if the car runs you have no air in the lines. You do need to pressure test the system for leaks (which it sounds like it's leak-free now) so that's fine.

Dale

oo7arkman

iTrader: (2)

Thanks Dale. I was hoping you would see this and respond.

That is what I was thinking too, has to be something I messed with. I looked them over really well and that is why I pulled them back out. When I touched the 9V to them they cycled well. Fuel is set to go to them first, then the primaries. I checked the resistors and they still spec out.

Is there any way to test to see if they are getting an electical signal withough the car running? This way I can use a multimeter or an led light to confirm there is/is not an open signal being sent to them?

DaleClark

iTrader: (55)

OK, you said "resistors" so I assume you have aftermarket injectors with aftermarket injector plugs and resistors wired in?

If so, that wiring somewhere is likely boogered up. You can get what's called "noid lights" that plug in to the injector plugs and light up and flash when they get pulsed by the ECU. No flash, not getting a signal.

Also, check the plugs - they should, with the key on, be getting 12v on one of the wires. You can test that with a multimeter. They get 12v on one wire all the time and the ECU grounds the other wire to make the injector go.

And, make sure your injector settings in the PowerFC are correct in case that got weird or something.

Oh, you can also use the meter to test the continuity of the wire from the plug back to the ECU.

Dale

oo7arkman

iTrader: (2)

Thanks dale. I really appreciate the help. I thought i had seen those lights to test injectors a while ago bit did not think much of due to never needing them before.

I looked all the wiring over this past weekend on the secondaries and they "looked" ok and the only thing i metered was the resistors. Guess i should have been more thorough if this turns out the issue.

Have you ever seen gasoline wick up the fuel pump wires before? Or have any idea how to prevent it. That connector bothers me having gas on it...

oo7arkman

iTrader: (2)

Ok, so I have gone through all the injector wiring. I am seeing 12v at the injectors with the key on, I have continuity on the ground from the injector plug to the ecu. I am still facing the same issue. Car stalls with any sudden movement of the throttle and when reving past 4100rpm while in neutral.

Possible bad ecu (PFC)??

Possible bad coil that is not able to suppourt additional gas inflow when secondaries open?

I am running out of ideas.

If someone in the Orlando area would let me swap pfc's for long enough to trouble-shoot this (an hour maybe at the most) I would appreciate it. I have a datalogit and can save/reload your map.

oo7arkman

iTrader: (2)

Ok, so I wanted to test the car for several days and trips before stating that I have resolved my problem.

I ended up restoring PFC to factory default, and reloaded my map. Car fired, revved easily past 4100, and does not stall. Took the car for a drive (NO boost) and everything was perfect.

A few days later I worked boost back into the engine slowly staring at the WB and listening carefully to the motor. Everything was good all the way to 15psi which is what I am tuned to.

I can say this fixed the issue. Hopefully this may assist someone in the future.

G's 3rd Gen

iTrader: (11)