88 tbi 350 starts up and dies

**lickmyburger89** · 10-10-2018

lionelhutz, fuel pressure is good. EGR is closed. I can verify timing is correct. I have checked the MAP with a vacuum pump and multimeter and signal is getting to the pin out, but I don't have a bidirectional scan tool for OBD1 to check what the computer is registering. All vacuum lines are holding air, one of the first things i checked and even plugged all but the map line to be sure after checking the map line would hold vacuum.

**lionelhutz** · 10-10-2018

The timing mark is correct, not the timing using the mark.

If you have a laptop, then you can use a cable and WinALDL or TunerproRT to watch the data.

It's not injecting enough fuel, but I'm sure you already know that.

If you're thinking orange terminal posts means 5.7 injectors then that is wrong. The color coding was 2 colors on the angles of that center piece the plug clips to. One side was orange and the other side was black.

http://www.gearhead-efi.com/Fuel-Inj...d-part-numbers..

Here is a thread post with a picture showing where the colors would be. They seem to come off easily though and are often not there.

https://www.thirdgen.org/forums/tbi/...ml#post5860981

**brian617** · 10-10-2018

Originally Posted by lickmyburger89

but I don't have a bidirectional scan tool for OBD1 to check what the computer is registering

You don't need Bi-directional capability, hardly anything OBD1 used Bi-directional. You just need a scanner that can display live data or cable and Tuner pro.

**lickmyburger89** · 10-11-2018

brian617, sorry about the wrong terminology, sometimes my mind leaves me. i understand i need to access live feed but haven't been able to get anywhere on purchasing or borrowing yet.

Loinelhutz, yes, i do know its a fuel issue. i also know my fuel pressure is good.

i'm trying to figure out why the injectors choke with everything connected. spray is perfect until i plug in the map to complete the system and everything i've checked associated has been in spec. they are 350 injectors and they both ohmed out to spec

**brian617** · 10-12-2018

Originally Posted by lickmyburger89

brian617, sorry about the wrong terminology, sometimes my mind leaves me. i understand i need to access live feed but haven't been able to get anywhere on purchasing or borrowing yet.

Just didn't want you to think you needed a special scanner. Lots of older Snap On scanners can be had pretty cheap, but TunerPro and a ALDL cable from moates is cheap enough.

**lickmyburger89** · 10-13-2018

of course. i'm hoping to have something situated within a week. trying to get this ironed out so i can finally get to the body work

**lickmyburger89** · 10-31-2018

It's been while but here is what. I came across a CHEAP($20) known good matching ECM and bought it thinking an extra lying around wouldn't be a bad idea anyway. For shits and giggles, I hooked it up and there was no change. Before that I borrowed an old mt2500 and it would die out as soon as the key was turned, but it was acting flaky as I was powering it up was well so I was going to just find another scan tool.