check your wiring and grounds. I had the opposite problem. turned out to be 2 wires grounding out to each other.

when I did my blazer I used the stock tank, found a E2000 pump on ebay for $36 shipped with lifetime warranty made in the USA product. ran rubber fuel lines from tank to motor with inline fuel...

well like I said I would let you guys know what it was. turns out when my harness was bench made we soldered everything and heat shrunk it. I started tracing out wires and ohming them out, to ground...

will connect the park/neutral wire.

I hooked up the crank wire from the beginning. and checked it at the computer and had 12V while cranking

looks like I will be taking the plug out of the...

here is the most current data log I can do

all motor sensors are plugged in.

up to date:

all sensors are plugged in and working as far as I know

I can get the truck to start with EST wire plugged in only under this condition
truck is warm
I hold it at WOT
it will do...

did some data logging. and also found some new things I hope that will help

EST disconnected 5563

EST connected 5564

than I noticed I had knocks going on with start up disconnected knock...

I have the efi grounds on passenger side under the map esc bracket. I will re route the plug wires better. The motor was running good when pulled out of 91 blazer, so the cam timing should be ok....

So anything above idel it dies whith wire connectedbut if it lugs at 400rpm it will run touch the gas and dies

5549555055515552

wiring is little messed up right now due to been working on it.

new thing, turned the dizzy and it will start and run at low RPMs. as soon as i hit the gas it dies, wire is...

I will get some up to date photos this evening.

I have a third EST and will try that this evening.
off hand do you know what size screw holds it in? 6-32??? or smaller

#1 is drivers side...

from what I can tell the balancer has not moved any. did a TDC with #1 plug out and 0 timing. starts and dies after about 2 fires. disconnect EST wire starts idels at 600 no timing advance of course....

tried something else:

disconnected EST wire started it. disconnected ESC watched tunerpro both errored out. shut down truck, plugged both back in and the truck started with both connected....

during start up I wonder if when the EST wire is hooked up it is making out the timing? advanced or retard

yes I have verified TDC on compression stroke. took valve covers off and made sure. rotor is pointing at #1 on distributor as well.

stupid question but I want to get it out of the way.
I have...

during the start up, could the computer be telling the districtor to advance too much? if so im sure it would be wiring somehow like a sensor is value to too high. caused by maybe a bad ground or...

the engine will riv up to 4k if I want it to. when i rev it up it does not advance.

makes sense about the bypass wire not working until it is restarted. idels right at 650.

right now I have code 42 so EST. wire is disconnected. so makes sense. I have tunerpro RT with moates usb to aldl cable. that is the only code I have posted

So started truck with wire disconnected. Let it warm up. Timing is at 0.

Also just so it is know I am using a non adjustable timing light if that maters.

I plugged in EST wire while running...

ok I will check that today, I thought the wires on the pickup coil only plug in one way though? so remove them from there plug and reverse them? It is worth a shot.

check all grounds, look good test light from battery to computer good ground and hot. what tells the computer the truck is running? like a spark signal?

tell me if im too far off;
when sire is...

A6 is on when key is on and cranking, B1 and C16 are always on key off on crank

really dought timing issue due to it starts so nice when disconnected.

would the computer be trying to advanve...

ok thanks! I will give this a try tonight

the injectors counuine to fire for a split second after it sounds like power was cut to it.

1974 chevy K5 blazer truck
1991 Chevy K5 blazer 350TBI motor
SM465 and 205
Wiring from same truck
EGR deleted from wiring harness

Problem: truck will start and run for about 1 second than die...