Sensors

[Alan 007]

Hey Guys,

I recently purchased a 96 Silverado 2500 6.5 Turbo.
What are the two sensors on the left side of the block? The one closest to the firewall was unpluged, would this cause any issues like stalling?
Thanks.
007.

[racer55]

Pictures are worth a thousand words.

[Alan 007]

On a closer inspection, it wasn't a sensor. On of the glow plugs came unplugged.
Sorry for waisting forum space.

[DmaxMaverick]

Certainly not a waste of forum space. You didn't know, you asked. That's why we're here. Simple as that.

To answer your question, no. An unplugged glow plug will not cause a stall. If it is stalling, please start another thread, detailing the conditions. There are a lot of basic troubleshooting tips specific to stalling in the "stickies" at the top of the 6.2/6.5 Tech Forum. Please take a little time to read through them.

[Robyn]

The front sensor or the LH side of the engine near the front is the temp gauge sender.

Stalling on a 6.5 can be linked to several issues, the most common of which is the PMD or some call it the FSD

"Pump mounted driver" this is a little "black box" (possibly gray if its been updated with the latest stynadyne part.

This is located on the LH side of the injection pump, unless the PMD has been remounted on a remote cooler (This is the best plan)

This device controls the injection pump.

These are nortorious for failure and do not like heat.

There is a lot of good reading and info on the infamous PMD here at the forum.

If the truck starts well, then after a while just abruptly stalls, its a good bet that the PMD may be the culprit.

This is one of the first places to look with a stalling issue.

Fuel filter service is another spot that can get overloooked.

Been many times that folks have chased their tail to no end and the issue was simply a dirty filter.

A plugged filter will "Generally" manifest as sluggish running with possible missing and low power.

The PMD failure is usually an abrupt stall.

When hot a failing PMD may not allow a restart.
There are usually no codes (ses light) set with a PMD issue. It can happen, but its more rare.

If the PMD is still mounted to the Injection pump then the stalling issue may well be due to a failing PMD.

You can leave the OLD PMD right on the Injection pump (IP) and mount a new unit on a remote cooler with an extension harness (available from several sources. (Good vendors advertise here at the page)

The PMD must have a little resistor unit installed in the plug socket (where the wires plug into the unit) these are calibrated to the specific IP but a number 5 will usually work on most without issue.

Looking at the resistor, its pretty simple to see how it goes into the PMD

Carefully insert it and work it down onto the pins.

Running without a resistor will eventually cause a code to set.

More info on your troubles will help further diagnostics


Missy