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No start 95 S

Here is a pic of a 6.9 idi that played the ether game.

Notice the cylinder to the right does not have the caved in area on the block from the precup blowing into it. That is how it is supposed to be. That cylinder didnt fire yet. This shows you it is compression activated, not just glowplugs igniting the ether.


IMG_2266.PNG

Of course the head and precups were destroyed. The glowplugs were inactive.
 
that's why I say it takes 2 people to do it right. Most give it a pretty healthy shot and then walk around and get in the truck to crank it over. to do it right the engine must be already turning over and then it's just a light mist from the can not the usual stream you see most do
 
@Will L. I pulled the filter minder and did a micro shot of starting fluid (let off the spray nozzle as soon as the ether started coming out) put the filter minder back in, then got in and cranked it over. Fired right off. I know very well the dangers of too much ether with an IDI. As the commercial says, performed by a trained professional, do not attempt at home.
 
Well I pulled the glows and I have no fuel being injected.

Cranked with both PMDs, no difference.

I know early on I had some fuel because when the injector lines were loosened it got wet around the line.

Did not have a chance to check compression.
 
packratt said:
Well I pulled the glows and I have no fuel being injected.

Cranked with both PMDs, no difference.

I know early on I had some fuel because when the injector lines were loosened it got wet around the line.

Did not have a chance to check compression.
Click to expand...
Check your fuel shutoff solenoid.
 
I'd swapped the fuel solenoid that was in this truck for one off of the old pump from the K3500. Swapped the original fuel solenoid back and still no fuel.

Checked the drain and pump is still working.
 
So , where exactly do you have fuel ? At the filter but not at the injectors ?
 
Have you been trying with the injection pump return line run to a container?

When I get this deep into it, I usually pull the Fuel shut off solenoid and turn the lift pump on for 1/2 second and verify there is fuel there.

Have you verified the Fuel shut down solenoid is functioning correctly? Do you hear a click when the key is turned to run? While you had it out, did you do a visual to make sure it was working?

Have you been able to check for voltage from the PMD at the injection pump? I would definitely do that before investing in an injection pump.

Have you checked for an optic sensor filter? Removed it, if you had one and plugged directly into the IP?

I believe there have been many IP's changed for wiring issues. And the new injection pump worked because the wiring was taken lose and re-installed. Just my opinion. Probably skewed because I have only had 4 IP's replaced in about 2 million miles. 3 on warranty at about 100,000 miles on the Tahoe, and both Suburbans. The other was mechanical on the 89 at 300,000 miles or so.

Though I might now be looking at IP's on the 2 Suburbans - having undiagnosed issues with both. They have about 200,000 and 250,000 miles since the IP's were changed last

I believe that part of my IP longevity is that I most often run out of our home tank which is premium diesel with 11% bio and a few additives and I have 2 micron filters on the tank before it ever gets to a vehicle.

I would definitely have the present IP checked before replacing it. Are you lucky enough to have a good IP shop near by?
 
That was my whole point asking about the fuel shut off solenoid. If there's no power to it, you can swap in any number of good solenoids and still have no start/no fuel to the injectors.
 
jrsavoie said:
Have you been trying with the injection pump return line run to a container?
Click to expand...
Have not done this but have a clear line between IP and return tube. Not getting much fuel there but according to DieselPro this isn't a problem.

jrsavoie said:
When I get this deep into it, I usually pull the Fuel shut off solenoid and turn the lift pump on for 1/2 second and verify there is fuel there.

Have you verified the Fuel shut down solenoid is functioning correctly? Do you hear a click when the key is turned to run? While you had it out, did you do a visual to make sure it was working?
Click to expand...

Early on I had voltage to the fuel solenoid, didn't check after I determined no fuel being injected. Haven't checked the solenoid but have swapped the one off of my old IP (K3500). Swapped the one from this truck back in after I found out no fuel being injected, in case the one from the K3500 was bad.

jrsavoie said:
Have you been able to check for voltage from the PMD at the injection pump? I would definitely do that before investing in an injection pump.
Click to expand...

The PMD diagnostic says there should be 0V with ign on no crank and ~1.2V when cranking. I have 0V with ing on no crank and voltage with cranking. Can not get a steady reading when cranking but do have voltage.

jrsavoie said:
Have you checked for an optic sensor filter? Removed it, if you had one and plugged directly into the IP?
Click to expand...
No optic sensor installed.

jrsavoie said:
I would definitely have the present IP checked before replacing it. Are you lucky enough to have a good IP shop near by?
Click to expand...
I do have a good IP shop near but with >175000 miles on the odometer and an unknown amount on the IP it would probably be smart to replace it if I have to go to the trouble of pulling it.
 
Not much fuel in that clear line: as in how much? That is a big deal if not much is there.

Bypass the shut off solenoid completely. You need definitive diagnosis or your cost for diagnosis is going to get real expensive real fast. You can pinch the fuel return line with a pair of pliers to shut off engine if it starts and no solenoid to kill it.
 
I put a 8-10" piece of line between IP and tube so it forms an arch. With all the cranking I've done I've only gotten about 3" of fuel in the line.

Do you happen to know the thread pitch for the Fuel Solenoid?
 
packratt said:
Have not done this but have a clear line between IP and return tube. Not getting much fuel there but according to DieselPro this isn't a problem.

If the return line is blocked the truck will not run. I had this on a 94. I ran the return line to a container and the truck fired right up.

Early on I had voltage to the fuel solenoid, didn't check after I determined no fuel being injected. Haven't checked the solenoid but have swapped the one off of my old IP (K3500). Swapped the one from this truck back in after I found out no fuel being injected, in case the one from the K3500 was bad.

Physically check if the solenoid is operating correctly. When you pull the solenoid, hit the lift pump for 1/2 second and verify you are getting fuel there.

Do this after it has set a while without the lift pump running to see if you possibly have a leak down issue going on.

The PMD diagnostic says there should be 0V with ign on no crank and ~1.2V when cranking. I have 0V with ing on no crank and voltage with cranking. Can not get a steady reading when cranking but do have voltage.

That does not sound right. It has been a couple of years since I did that test, But I think I had steady voltage. Maybe message Buddy or somebody to tell you for sure.

No optic sensor installed.


I do have a good IP shop near but with >175000 miles on the odometer and an unknown amount on the IP it would probably be smart to replace it if I have to go to the trouble of pulling it.
Click to expand...

Before you replace the IP, I would have yours tested. If your IP is fine, I would save the money. And frustration. If your IP is fine and you just replace it. You may well have a no start situation with a new IP. Seen it before

If you try this other stuff and get for sure on fuel delivery and voltage, You might look into having them diagnose.
 
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Prior to today I had checked voltage coming in to the fuel shutoff solenoid and swapped solenoids.

Today I bench checked both solenoids and they functioned properly and checked incoming voltage.

Plugged one into the wiring harness and turned key and solenoid would not activate.

Pulled up the wiring diagram and electricity comes into the solenoid from the ignition switch then goes to the PCM.

Removed the plunger and reinstalled one of the solenoids. Cranked truck and had fuel being injected and going through the return line.

Replaced glows and truck started.

Now I get to figure out why the signal is not being returned to the PCM. I shook the wiring harness running under the intake to no effect.
 
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