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Where is the GPR located and what terminals do I check with Multi-meter? What mode for MM-----DC volts, or OHMS?
If Ohms I know to disconnect Battery.
I appreciate your helping me Guys.
Marvin
here's a video that explains how and shows where etc.
If it's not sputtering at all, I doubt it's glow plug related. No sputter means no fuel, and that means either your IDM is dead (unlikely), or your PCM isn't commanding it to fire the injectors. You need to get something to watch what's happening while you're cranking. Look for RPM (verifies CPS), ICP, and IPR % for ICP control. The easiest way to troubleshoot without OBD is to try it with the ICP disconnected. This allows the PCM to choose a default ICP of 700 something, telling the injectors to fire. If there is cranking ICP then the thing will start. If no change, then your ICP sensor is likely good and you can try the IPR. One member just recently had his IPR solenoid slide off the IPR because the tin nut backed off, and another had damaged wiring to the IPR, both caused it to not work and thus no ICP, no fire. A loose tin nut can be intermittent, and IPR's can get sticky and become intermittent; that happened to me over the course of a few weeks of intermittent stalling and no starts.
Your GPR is shown at about 11:00 off of the fuel bowl here. The front small lug should have power when key is on. The rear small lug goes to the PCM, which grounds it when glow plugs are called for. The large lug on the left comes off of the battery and has power at all times and the large lug on the right gets power when the GPR is activated. You can check that large right lug for power when you turn the key on, engine is cold and it's cold enough to call for glow plugs. When activated you can also check for power across the two large lugs and there shouldn't be much, if there is a lot then your GPR is bad. All 12V on your meter.
Also could have a bad pcm, not commanding the ground needed to activate the gpr. Thats what was my case, so i ran a switch and control it manually...may want to verify before throwing the cheese at a gpr..good time also to do the gpr-led mod. That gpr in the morning, will stay energized for up to 2min..(about the same time length for your seatbelt light to go off)
With a glow plug system going bad, these trucks will not start when temperature gets into the low 30's.
Plug in the block heater for an hour. See if it will start.
EDIT I just noticed the posting dates. My/this post becomes a coin toss.
03-23-2018, 02:51 PM
