lack of glow plug signal
RD, thanks for your response.
RD, thanks for your response.
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.
This seems to be of interest, though I did indeed turn the key to off. I did not however, nor continue to register any glowplug activity. i put that up to a related electrical problem, but your explanation seems on the money. is there a way, while setting the ignition to off, that the glow plugs would still not fire? and with the engine quite warm, i would have expected ignition at that moment anyhow. does the glow plug cycle activate other essential elements that i do not understand?
with some investigation, thinking my fuel supply was to blame, i discovered a dislodged heater element at the bottom of the fuel filter. What i have is 270 degrees of a wire loop element, attached on one end to a bolt in a slot, and the other end appeared fused to a round disc, attached to the filter housing. the round disc and the wire have both broken free, and while disconcerting, i cannot relate my original problem to this new one given my relative lack of understanding.
thanks again RD, any more would be welcome. got the bugger wide open now, so...
sam
Does the tachometer register anything when you're cranking? If so, then the CPS is probably functional.
Gonna have to check on this with the filter back in place, but...
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
