gen III 3sgte runs for 5 seconds and shuts off Options

[match220]

engine: gen III 3sgte powered by autronic SM4 ecu, walbro fuel pump and stock injectors

This is my first time starting this engine since I bought all of the parts for it (formerly parted out), rebuilt it, and wired in the Autronic ecu. My engine starts and runs for about 5 seconds at a time and then it dies from a lack of fuel from the sound of it (not the fuel pump shutting off). I have a feeling it has something to do with the fuel pressure regulator. According to the vacuum diagram that I found in a google image search it doesn't need a vsv and it connects directly to the intake manifold, but I'm thinking that I need a vsv between it and the manifold. I am tempted to put on my AEM fuel pressure regulator that I have lying around but I would rather get the stock one running first and then work on getting the aftermarket one going.

[delusionz]

think your barking up the wrong tree

stock fpr works fine without a vsv and i cant draw any correlation between a faulty fpr and running for 5 seconds and shutting off

go back to your mechanical timing settings, wiring, fuel and ignition systems double check, then check all the datalogging and diagnostics you can on the ecu, if it has some type of idle learning process or setup for that then check over that, check over your fuel maps, etc


when it does run, does it sound good or is it rough?

[match220]

think your barking up the wrong tree

stock fpr works fine without a vsv and i cant draw any correlation between a faulty fpr and running for 5 seconds and shutting off

go back to your mechanical timing settings, wiring, fuel and ignition systems double check, then check all the datalogging and diagnostics you can on the ecu, if it has some type of idle learning process or setup for that then check over that, check over your fuel maps, etc


when it does run, does it sound good or is it rough?

There is no idle learning process, I have to press the pedal a little bit at starting, I'll have to adjust the TB butterfly a little, but when it does run it runs good. Just hard to start. I have data logging off.

[bsamps4]

Is your fuel pump resistor pack connected?

[match220]

Is your fuel pump resistor pack connected?

no, it's wired in to its own power source

[Ted95]

Idle air control valve connected under the throttle body ?

[match220]

Yeah..that's connected. I'm going to play with the fuel map a bit and see what happens

[match220]

I've traced down a faint ticking that is coming from the IACV. It is ticking like a madman. 10 times a second I would guess, if not faster. I know I have it configured right in the autronic. If I unplug it then the car runs for 3 seconds and dies the same as if it were plugged in. If my problem is the IACV, I can't even find where to get a new one.