california powerstroke
 

Hey guy I just bought this 99 psd 7.3l it started out running fine and it would sometimes cut out ad have no power I would shut it off then turn it back on and it would be fine then one day it finally cut out and wouldn't restart. So after replacing the cps icp sensor found bad connector on the fuel pump that solved the starting issue but the check engine light was still on so I had a local shop diagnose it they said idm injector drive module and gpr glow plug relay the idm goes for anywhere from6 to 900 and I found the stancor relay talked about on the forum but to finally get to the question my truck Is california desiel and I read that thay have a gpcm glow plug control module can I use that stancor relay or do I have to get a different part because it a gpcm?

I believe you need an actual GPCM. I'll direct CSIPSD over here. He knows more about the SD Cali models than i do...

You will have the glow plug control module... about $180 bucks if you shop around. I think I paid $140 for the last one.

Auto Computer Exchange has IDM's for $200 bucks, I would go that route if you need an IDM.

Check the wire harness, the GPCM's love to eat them.

Welcome to the site!

Thank u guys very much found the idm u were takling about for 200 its remanufactured would that be fine? Also found a gpcm for 160..... anything special I have to do for install other than disconnect the battery?

Reman will be fine on the IDM, its in the drivers side fender well, need to remove the fender liner to get to it.

GPCM no need to unhook the batterys, just have the keys in your pocket and go to town.

What codes are leading them or you to a bad IDM? Hate to see you throw one in when all you have is a bad wire harness or UVC...

I took it to a light duty specialists here in town and he said the harnes is fine, u need an idm and a glow plug relay and quoted me 1300 bucks if I can do it myself for 360 and some shipping that's not too bad. He didn't tell me the codes but I pulled them prior to it not running and they were 1 active p1280, p1316 and p1211 if I remember correctly

Man I hope your not barking up the wrong tree... None of those are a "yup its your IDM" type of code.

How many miles on the truck? Any mods?

174200 all stock got it with this problem had to put a tranny in it put a new cps and icp sensors and was stumped so I took it in for a check and advise and that's where I'm at

Where are you located? Just woundering if there is someone close by that could take a look at it.

Just dont want you do spend the money on an IDM for nothing.

I'm in hanford aboutb 45 mins from fresno

I dont know if anyone is from around there. Might post up in the CA forum

https://www.dieselbombers.com/groups...a-bombers.html

See if there is anyone close to you.

I would check out the wire harness on top of the motor, check the UVC harness where it goes into the valve cover.

Ok ill try that do u have any ides of what the real problem might be

Could very well be a bad UVCH (under valve cover harness) or valve cover gaskets...

Is it possible for the california truck to havea glow plug relay instead of a glow plug control modulebecause the one under my hood I'm 95% sure its a gpr not a gpcm or could it have both?

Its round about inch an a half tall with 6 wires connected to it and a couple nuts holding it on sits to the left rear of the fuel filter cap

You are looking at the Intake Air Heater Relay... Just behind it is the GPCM...

I dont have a picture of it right now, but its is a box about 2"x3" and mounts next to the passanger valve cover right behind the relay your looking at. It has a Black plug and a Green plug.

There's only one black connector behind that I've seen pictures of both parts this one looks like the grp

See this picture...

There are two relays there, you should have one, and a GPCM...

http://inlinethumb27.webshots.com/43...600x600Q85.jpg


Dont mind the arrow, it was for something else.

I see the two relays I only do have onre but its the one where yourred arrow starts but I still don't see the gpcm on mine sorry to look like an idiot but in all new to diesels and how they work

Then you must have an E-99 truck...

Post a picture up if you can...

That was my thought as well...

I have pictures but I only have my phone for internet and I don't know how to upload and put on a reply

Also is e-99 early 99 and what's thbe difference between the early and late models

Yes e 99 is early 99. The early ones did not have the intake air heater so it only needed 1 relay for the glow plugs instead of 2 (1 for glow plugs and 1 for the intake air heater). The people on this site are here to help and know that asking questions is the only way to get answers. The only stupid question is the one you are afraid to ask.

https://www.dieselbombers.com/ford-p...tml#post666694

There is a thread we threw together that has most of the differences between the early 99 and late 99... Some great info.

Take a couple pictures of the top of the motor and send them to me if you want...

208-401-5183

I can throw them up here for you.

I have to work this morning/afternoon so I may not get them up until this evening.

Thank u guys much that's a huge list of differences just means I have a lot of upgrades to do , so that relay in looking at would be the glow plug relay then and would it be fine to use the stancor relay for the swap? I sent the pictues tou your phone greatly appreciated

Yes, Either a Stancor or just run on over to your local Napa and pick up a GPR-109... Inexpensive and it gets the job done.

Code 1316 is common with a loose UVCH connection. Easy to check after pulling valve covers. Can also ohm out through the connection at the valve cover as well.

Ok and as far as the idm goes there wouldn't be any diference there right? The under valve cover harness and gasket are in good shape, I don't know what other direction to go other than the idm and gpr thanks to your guys help I can get the parts fo $250

So it looks like you have a normal GPR but it has the extra resistors that the early Cali models did. I real need to look into if you can just delete all that crap.

Also, It really does not look like your UVC gasket was replaced which leads me to doubt your under valve cover wire harness was replaced. The ammount of oil and crap on top of the motor looks like its never been taken apart (at least not in weeks)...

Pull the valve covers and check the wire harness...

Hey guys sorry its been a while I checked the harness it was good found a reman idm on ebay from auto computer exchange for 140 and just went ahead and boutb the reccomended grp 110 from autozone 63 bucks did the simple install firedher up and the check engijne light was gone no problems so far if anything should so happen ill let u guys know thanks for the help really appreciate it. Saved myself 1100 dollars.

I took mine to the Ford Dealership for them to diagnose as my OBDII was not showing any codes. So, for 100 dollars they told me the IDM was bad in my 99 F350. I like you, ordered a remanufactured part for much less than Ford wanted and replaced it myself. However, I had bought a new fuel filter and cover from Ford (had a NAPA or aftermarket fuel filter) and the technicians used a screw driver to get it off after I had told them it had recently been changed and it wasn't the problem! Scarred up my new fuel filter cover; pissed me off!

Congrats on saving a ton of money! :jump: James