I'm completely stumped

Reply Subscribe

Thread Tools

Search this Thread

Mar 12, 2011 | 06:51 PM

#31

richdawg

Fleet Mechanic

Joined: Oct 2006

Posts: 1,386

Likes: 1

From: Spokane, WA

Quote:

Originally Posted by Dvandy21

Hey guys, first I just wanted to thank you all for all of the good advise. I did some testing today with the voltmeter and sure enough the GPR wasn't working properly. I had a spare one, so I hooked that one up and it too wasn't working. I checked the ground and it turns out it was getting a bad ground. I got the problem all taken care of, so I cant be sure til the morning, but the GPR should now be working properly.

If you think you got the problem all taken care of, you shouldn't have to wait till morning. If your in State College, PA your temp was about 50 today, thats usually good starting temp if things are working right.

Mar 13, 2011 | 09:42 AM

#32

Copedawg

Lead Driver

Joined: Aug 2006

Posts: 5,259

Likes: 17

From: Gambrills

Well? What happened this morning???

Mar 13, 2011 | 12:08 PM

#33

Dvandy21

Thread Starter

Senior User

Joined: Sep 2010

Posts: 152

Likes: 0

From: State College, PA

It started right up this morning! I'm so relieved, this has been the biggest PITA for the last few weeks. Fixing the GPR was all it took. Thanks again, guys, for all of the good advice, couldn't have done it without you.

Mar 13, 2011 | 12:16 PM

#34

Copedawg

Lead Driver

Joined: Aug 2006

Posts: 5,259

Likes: 17

From: Gambrills

Good to hear Dave!
Don't be a stranger, see you around!

Mar 14, 2011 | 05:39 PM

#35

Dvandy21

Thread Starter

Senior User

Joined: Sep 2010

Posts: 152

Likes: 0

From: State College, PA

Well I guess I'm not quite out of the woods yet. The truck wouldn't start today. I hooked up the volt meter and one of the large posts is registering 12.8 volts as it should. The large post with the two wires coming out of it (which go to the plugs, correct?) is registering 0 volts. That's with the key turned to the "on" position and the "wait to start" light on. The original issue turned out to be a bad ground, so we ran a wire directly from the negative battery terminal to the GPR. That seemed like it fixed the issue, it started yesterday morning when it was about 35*. This afternoon I went to start it for the first time today (it was in the low to mid 40's) and she wouldn't start. Any ideas why the one large post would be registering 0 volts?

Mar 14, 2011 | 06:21 PM

#36

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

Likes: 39

If you are using a GPR , (case isolated not a starter relay) the PCM sends ground to the GPR to time the GP's , based (mainly ) on EOT ...

So are you saying you fixed the no start with a ground wire ? Did you replace the GPR ?If you grounded the original , it is most likely burned out ..
No ground from the PCM can be a couple of things