No Start After Replacing Injectors

[CrashDriver]

Hey, so recently I had been going through a bit of a debacle with my injectors- tried cleaning the old ones but in a nutshell what I did made them run even worse, so I ordered new ones. Or re-mans anyway. Truck ran before I swapped them, now it just cranks and cranks.
What I've checked:

Fuel pressure is good.

Sent power straight from the battery to the injectors with a probe, heard it activate and release fuel pressure, so the injectors are fine.

Checked for a pulse in the injector plugs, grounded test light to the engine and poked it in one of the terminals - it pulses when the engine cranks.

And yet, even though I have fine pressure and the electricals all seem fine, I pull the spark plugs after several cranks and they're dry as a bone! Somehow fuel is not making it into the cylinder.

Could it be that the new injectors happen to need more voltage to activate? Far as I know the ones I bought were supposed to be stock. I'm completely at a loss.

 

[bobbywalter]

will it run on ether?

 

[CrashDriver]

will it run on ether?

I don't have ether but just checked with starting fluid and nothing, not even a sputter. Just cranks.
Also just checked the voltage with the key on to the injector plugs and it's a solid 12 volts

 

[CrashDriver]

I'm trying to figure out if there is some plug or ground or something I didn't reconnect after the project but I can't see anything amiss

 

[bobbywalter]

I don't have ether but just checked with starting fluid and nothing, not even a sputter. Just cranks.
Also just checked the voltage with the key on to the injector plugs and it's a solid 12 volts

ether=starting fluid.

be sure your tfi module is plugged in. i assume you did not pull the distributor? are you getting a check engine light when you turn the key on? can you pull codes? possible the pcm ground is off...

 

[CrashDriver]

be sure your tfi module is plugged in. i assume you did not pull the distributor? are you getting a check engine light? can you pull codes? possible the pcm ground is off...

I did not touch the distributor, but the TFI is newer anyway. There were absolutely no codes I could read from jumping the plugs, sadly. I have an 88 standard cab ranger, any idea where I could find the grounding wire(s)?

 

[bobbywalter]

i do not know which style harness you have.....an 88 can have the later or earlier. it is similar to the mustang on the later....there is a grey round and black round with 10 or more wires in each on that style...on the passenger side for a 4.0 and iirc the 2.9 on the drivers side....they can look connected but are not. so check every plug carefully.

the fuel pump primes then quits running correct?

you have power on the coil?

there is a round plug with two to three wires that goes to battery ground coming from the eec. you want to make sure they are all good.

its possible you pinched tfi wires if you pulled the intake off to swap injectors.

 

[Uncle Gump]

All the cranking and no start with injectors pulsing... it's likely flooded now.

Dies it have a healthy spark?

 

[CrashDriver]

fuel pump works fine, the coil has power, and I just went through the whole harness.
No wires are pinched, I made sure all the plugs were firmly connected, and I checked the relay.
The only issue I could find is there's one solid light green wire that comes from a round black plug (they are on the driver's side) that is not connected to anything.
I can't find its mate either. Old guy I bought the truck from had done some wiring shenanigans in there so this green wire was spliced to something else at one point, but I don't know if it just got disconnected or has been like that. Or even if it's at all relevant.
Haven't been able to check spark yet because I'm on my own right now and don't have a tool

 

[CrashDriver]

there's one solid light green wire that comes from a round black plug (they are on the driver's side) that is not connected to anything.

Also I should mention it is not connected on the engine side, it's coming in from the firewall.

 

[bobbywalter]

if the fuel pump is cycling then the ecm is alivish.... you can jump the solonoid with a quarter to test spark

 

[bobbywalter]

not battery post to main starter cable post.......the baby starter start post to battery post.

 

[bobbywalter]

All the cranking and no start with injectors pulsing... it's likely flooded now.

Dies it have a healthy spark?

he had indicated plugs were dry......but injectors were firing......noid light wise. which means to me the tfi idm side is reporting .....and that pcm is somewhat working

 

[CrashDriver]

not battery post to main starter cable post.......the baby starter start post to battery post.

not sure if I misunderstood but there's only one wire from the starter, and the solenoid wires look fine.

Also found the other end of the disconnected mystery wire and reattached them. No change.

 

[CrashDriver]

not sure if I misunderstood but there's only one wire from the starter, and the solenoid wires look fine.

Sorry, didn't see the prior message - that makes more sense. Yes, there is spark at the solenoid.