I am revisiting this issue, I shelved the project for a bit, but I really want my pickup back on the road.
I have an 89 pickup that I am in the process of swapping in EFI. Everything is from a 94 - ECM, body, engine, fuse block harnesses, etc. OEM EFI fuel tank/sender... everything Toyota OEM.
Crank no start. Have fuel pressure. I put fuel in the intake plenum, it fires up right away and runs very smooth until the fuel runs out. I pulled back harness insulation to check if wiring to injectors was corroded- everything looks good. Power gets to the injectors, ECM is cycling ground to injectors. I am stumped. Is there a possibility that the igniter is bad? If anyone is local, would like to see their truck to see if I overlooked anything.

 

Sounds like the ground harness isn't bolted down. There should be a small bundle of brown wires with black stripes that bolt to the lower part of the intake near where the upper half bolts on. Those are the just slightly important.

 

Really need some noid lights to really check. But I'd unplug the first fuel injector and put a test light or a meter across the terminals and have someone turn it over. Look for the flashing light or rdngs to 12 volts and back to nothing.

But yes white trash is right there's a bundle of ground that attach on the stud that holds the upper to the lower plenum....check to see if they are attached...also check the battery to block ground. There's one behind the exhaust manifold that needs to go to the firewall too.

 

Thanks for the replies.
Yes, all the ground straps are secured.
I am getting 12V to the injectors (constant B+ with key in "RUN" position) I know the ECM cycles ground to the injectors - hooked up a test light and was getting ground. I was just at Harbor Freight a few days ago, should have bought the noid light kit I saw.
I know the circuit open relay is good - I am getting fuel pressure when cranking. I inspected the fuses when putting in the fuse blocks - all fuses are good.
There is a thread on yotatech and a guy had the same problem - but he never reposted to say if he had figured it out. Someone posted on that particular thread to pull out the distributor, turn key to ON position and spin it by hand - should be able to hear injectors cycling if pickup coil is good - any truth in that?

 

Thats a dang good idea though...ive never thought of that..

How are you verifying your fuel pressure?

 

Verifying fuel pressure in a very non precise and not so safe way...slightly cracking the banjo bolt to the cold start injector. When I crank it sprays out strong. That's the irritating thing about the 22R, no port for a fuel pressure gauge.
Xs...since you have a 94, may I send you 2 photos of a terminal? It looks like a ground terminal, but it is a B+ terminal. It is on the LT side, between the AFM and the ignition coil. I have no idea what it supplies power to. I thought it was a ground terminal, so when I installed the battery, the cables got warm.

 

Yessir, send it to me here on PM or I can PM u my #

 

I removed the distributor, spun it by hand, key ON, with a screwdriver to my ear I could hear the injectors clicking. The pickup coil is working ok. I'm completely lost and it's probably something very simple.

 

Very possible fuel pressure isn't to spec...

 

fuel pressure to banjo bolt seems good. it shouldnt be fuel pressure. u getting spark to the plugs??
ive had this similar problem. would only run on starter fluid for the first few seconds then die when fluid is used up. cracked open the cold start banjo bolt, fuel sprayed out. i thought it was a bad fuel pump. bought $500 worth of new fuel parts/accessories -- still no start. come to find out .... wait for it.......



wait for it.......





wait for it.......






it was the ECU. internal. one of the high speed transistors that controls the injectors took a sh!t. luckily it was the #1 injector - so when testing, it showed up first shot. now, there are 2 transistors, they work to fire the injectors in pairs ( ex. 1-2 and 3-4) if one is bad, it wont fire the other. swapped ECU, fired right up.

on the otherhand, it could be the AFM.

if the igniter was bad, u would get no spark, and wont run, even with starter fluid.

***NOTE: if it will run fine with starter fluid, its something electrical, particularly fuel delivery.

just my $.02
hope this helps

 

I was thinking it may be an ECM since I was running out of options. Yes I do get spark - very strong spark. If I put gas into the intake manifold, it fires up as soon I turn the key. As soon as that fuel is spent, it dies. So spark and timing are ruled out.
-AFM - passes all ohm tests in FSM
-Circuit Open Relay - swapped into my 4Runner, started, relay ok
-Fuel pump runs when trying to start - hence fuel pressure at cold start injector tube
-Distributor pick up coil when manually operated can hear injectors clicking
-Have checked and rechecked all ground connections - secured
-Pulled apart harness to check for corrosion on B+ wires to injectors - no damage

So quite possibly an ECM
Thank you

 

cool. one way to check is to actually open the ECU and look. is what i did. and sure enough, the black ground-side transistor for the injectors popped.
if not that, then look to see if any of the capacitors are ballooned or have popped. if any of the resistors/circuits are burnt, damaged, ect.

 

Your truck 4wd? The engine setup come from a 4x4? Reason I ask is the location of the ecu is prone to water. Especially on a 4x4. My last one had a surge while accelerating. I saw the burnt spot mentioned and replaced my ecu and bam
Surge gone

 

I will have to take the cover off and inspect the circuit board. The PN is 89661-3D070. Some guy on yotatech was asking about ECM interchange and he had a 94 4x4 with that same PN. There was a link in that thread to a list of ECM PNs and correlating years.
http://www.4crawler.com/4x4/Images/22RE-ECU-Table.gif

I am getting the ground pulse from the ECM to the injectors.

My 89 pickup is 2WD. The ECM, AFM, engine harness, intake manifold, fuel rail, injectors I bought on ebay as a kit from a wrecked vehicle. No signs of water intrusion on anything. The body and engine fuse block harnesses I purchased locally. All stuff from 1994 model year pickups.

 

some are interchangeable. 89-92 93-95 . after inspecting my ECU and found the blown transistor, my journey to search for a new ECU began....
got one from a friend, was out of a 91.
with a few exceptions sometimes, one or a couple of wires/pin outs will be different.
when my ecu grenaded, a friend gave me his, from a 91. installed it and fired right up ---- but i did have to swap one of the pins to the ecu for the AFM (cuz the CEL was on) -after that, all cherry till now. been about 3 yrs so far no probs

 

I finally got around to pulling the cover plate off the ECM. Looks very clean, no burn marks, hot spots, etc. There are 2 big gray resistors near the connector pins that look somewhat misshapen, but nothing unusual.