Stalling: Fuel starved engine...

803 Views 2 Replies 2 Participants Last post by samduket, Feb 12, 2009

samduket

Discussion Starter · Feb 12, 2009

As the title might imply, I have a stalling 96 and could use some advice on where to start looking for answers. The problem has been ongoing but very minor, for the entirety of this winter (providence, ri), and has seemed at least in part to be tied to the engine being cold. Previously, she would just conk out, usually at a stop with the break on in drive, and fire right back up. Last night however, and it was over fifty degrees in providence, she died and stayed dead. The starter fired up, with more vigor than i normally experience, but there was no sign of ignition. I have surmised through looking through various posts on this site that the cps (camshaft positioning sensor?) often goes on these trucks and that it can caused stalling, but with no starting back up, is the sensor still a possibility? My thoughts beyond that are that my fuel line somewhere is shot, or that the filter is gunked up. Checked the filter, and it had fuel and seemed clean, so...Any thoughts are much appreciated.
thanks,

sam

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RD97

· #2 · Feb 12, 2009

samduket said:
The starter fired up, with more vigor than i normally experience, but there was no sign of ignition.

If you didn't first turn the key to the "off" position, then the PCM would not have activated the glowplugs. This could cause the observed increase in cranking speed.

samduket said:
I have surmised through looking through various posts on this site that the cps (camshaft positioning sensor?) often goes on these trucks and that it can caused stalling, but with no starting back up, is the sensor still a possibility?

Does the tachometer register anything when you're cranking? If so, then the CPS is probably functional.

samduket said:
My thoughts beyond that are that my fuel line somewhere is shot, or that the filter is gunked up. Checked the filter, and it had fuel and seemed clean...

You can check the fuel pressure with a tire pressure gauge at the Schrader valve on the side of the filter cannister. It should be around 50psi. (you might want to wrap a rag around the valve as you do this to catch any spray)

Another problem that can cause symptoms like this is a malfunctioning IPR. It's located on the bottom back left side of the high-pressure oil pump in the engine valley. Make sure the solenoid is secure on the spool valve (there's just a thin tinnerman nut that holds in on) and that the wiring is in good shape. I lost the tinnerman nut off of my IPR once, and it would stall regularly when accelerating up hills and into intersections.

-RD

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