Now my truck won't start

[EMD_DRIVER]

The PO had a sloppy scabbed together connection at the passenger side positive terminal.. I cleaned it up and got it together as best I could. Here's what I have:

You must be registered for see images attach

Anyway... The truck has been sitting in the garage, while I've been changing a couple of wheels/tires and the wiper motor. I've also had it on a battery charger. The PO let the batteries sit for six months, without much of a charge in them. They are less than 2 years old.

I tried starting it this evening, without much luck. The starter doesn't spin the motor, as fast as my 93 IDI's does... I'm wondering if it's either the batteries, or the starter, or a combination.. I plugged the block heater in for two hours, but still nothing.

I'm going to leave the block heater plugged in tonight, as well as the battery charger. I'm hoping to take the truck to work, so I can get the starting/charging system checked tomorrow. There's a local place, that will do it for free..

Anything else I should look into?

P.S. I know the GP system is much different than the IDI's. When glowing, I have much less cranking power. That leads me to believe, that at least some of the GP's are working, if not all of them... If I wait until the GPR clicks off, my cranking speed is much more...

 

[EMD_DRIVER]

Update: with batteries charging all night (Plenty of cranking power) and block heater on all night, truck still would not start.


Are these at all similar to the IDI, where you have to mash the pedal to the floor while cranking?


What else would keep it from starting? It started under much worse conditions, before I bought it..

 

[geonc]

Are these at all similar to the IDI, where you have to mash the pedal to the floor while cranking?

There is no need to mash the pedal on a PSD ..... fly by wire

UVC's come to mind....Wait a sec----Yours is a '94 right? That would be 1st gen PSD.

There were some issues with the HPOP resivuor bleeding down on '94-early '95

PSD's need oil pressure to fire---there are a couple things to look at depending on color of smoke from exh...
no fuel smoke [light grey]= no signal for oil pressure to fire

GP's are tested at the connectors in the valve cover--un-plug and using a DVM, check the 2 outermost pins at each plug--OHMS should fall between.1-.6 anything higher and it will not work....

Here is one of mine that failed.....the yellow plug goes to the inj and the black one goes to the GP---you can see the meltdown at the outside edge---where the GP pin is......

You must be registered for see images attach

 

[EMD_DRIVER]

There were some issues with the HPOP resivuor bleeding down on '94-early '95

PSD's need oil pressure to fire---there are a couple things to look at depending on color of smoke from exh...
no fuel smoke [light grey]= no signal for oil pressure to

What's the best fix for this?

 

[Silver91Hatch]

New gaskets and harnesses will atleast rule out that side of the GP's. You can check them by ohming the outside 4 pins, 2 on each side to ground and see if the GP's are open or shorted.

 

[EMD_DRIVER]

New gaskets and harnesses will atleast rule out that side of the GP's. You can check them by ohming the outside 4 pins, 2 on each side to ground and see if the GP's are open or shorted.

I seriously doubt it's the GP's. It started Sunday, without even cranking very fast. I left the block heater on all night and the motor is nice and warm now.

When I tried starting it Monday, it tried to fire a couple of times and had some slight smoke from the exhaust. Now, it will crank without any attempts at firing and there's no longer any smoke.

From what I can tell, there's no fuel getting to the injectors. What do I do now????

 

[geonc]

Now, it will crank without any attempts at firing and there's no longer any smoke.

From what I can tell, there's no fuel getting to the injectors. What do I do now????

Gary, have you checked the oil level in the HPOP?--remove the allen head plug and take a look.....should be within 1/4" or so from top...

Also may want to check the IPR --driver side front of valley--will have a bail wire clip. They are a magnetic coil type valve....mebee just a good cleaning of all wire connections followed by a coating of dilectric grease....

 

[EMD_DRIVER]

With a bit of guidance from Geo, I managed to find the problem....


The HPOP only had 1" of oil in it

Filled it up and she lit right off!

 

[aaklingler]

What caused that, will it do it again?

 

[EMD_DRIVER]

What caused that, will it do it again?

I'm still checking into that. Until I get the problem corrected, it could very well happen again. I PM'd Rich (94F450sd) to ask him how he dealt with this problem. Geo says that he has a mod that will eliminate the problem.

As to the cause, I believe it could be some bad O rings... Geo should chime in on it later...

 

[Double-S-Diesel]

the 94 didnt have a standpipe to eliminate drain back, could also be a bad lpop.
not excaxctly shure myself, rich and geo have more experiance than me.
I dont know if the a simple resovior change is all that is needed or not.
if so I have one.

 

[geonc]

With a bit of guidance from Geo, I managed to find the problem....


The HPOP only had 1" of oil in it

Filled it up and she lit right off!

Great talking with you Gary

I'm kinda in the dark regarding the first gen PSD issues other than hearing they had some drainback problems, but we will help the best we can!

As far as considering the LPOP...with your eng showing only 175K...I would look elseware first....Like you mentioned putting a mechanical oil pressure gauge

Rich has a few threads on modifing the first gen HPOP drainback issues...I thought they were here at OB but they are over at SD ...clicky here for Rich's thread

and clicky here for more

Hope this is of some help Gary

 

[EMD_DRIVER]

Thank you so much Geo!!!!!

 

[EMD_DRIVER]

What caused that, will it do it again?

I've let the truck sit for as much as two days since, but she started right up... I will report back, if it happens again. Until then, I'm planning on doing the standpipe mod...

 

[NJKen]

Not tryin to be a wiseguy but is there enough oil in the pan? When you have a problem like you are experiencing that is the first thing you need to check. Low oil in the pan = starved HPOP.
Ken