Rough idle when engine cool
#1
Rough idle when engine cool
Now that I've been really digging into my truck, one of the things that bothers me is that the truck runs so rough when I first start. When cold, it is just louder and a bit more sluggish feeling. Once warmed up it purrs like a kitten... Well, a lion perhaps, but it's smooth and even.
What causes that?
What causes that?
#3
I'm using Delo full synthetic 5w-40. when I say cold start, I'm talking like 60 degrees. It just runs louder and more obnoxious until it's been running for a bit. Not sure what could cause that.
#5
I am in CA, but not sure. It was originally an Oregon truck. I have the build sheet from dealer. Where would it say if it was California emissions? It says less catalyst, so maybe not?
#6
This is a Glow Plug Control Module which should easily be seen on the passenger's side top of the engine just in front of the Turbo assembly.
The reason I ask is that I have the California Emissions set up on my truck and experience the same cold starting problems you are.
My research to this point tells me the glow plugs are operating but may not be operating as designed due to an incorrect PCM being installed by a previous owner.
The reason I ask is that I have the California Emissions set up on my truck and experience the same cold starting problems you are.
My research to this point tells me the glow plugs are operating but may not be operating as designed due to an incorrect PCM being installed by a previous owner.
#7
Look under the hood for one of these: on the passenger side valve cover.
You will either have one of those, or two large brown relays on top of the motor, one for the AIH and the other for the glow plug relay. You will either have a GPCM or a GPR.
Ohm out your glow plugs and replace them if necessary. It's not that hard to do, just a little time-consuming, especially if it's your first time taking the valve covers off.
You will either have one of those, or two large brown relays on top of the motor, one for the AIH and the other for the glow plug relay. You will either have a GPCM or a GPR.
Ohm out your glow plugs and replace them if necessary. It's not that hard to do, just a little time-consuming, especially if it's your first time taking the valve covers off.
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#8
Look under the hood for one of these: https://www.amazon.com/Glow-Plug-Mod.../dp/B009VI5G38 on the passenger side valve cover.
You will either have one of those, or two large brown relays on top of the motor, one for the AIH and the other for the glow plug relay. You will either have a GPCM or a GPR.
Ohm out your glow plugs and replace them if necessary. It's not that hard to do, just a little time-consuming, especially if it's your first time taking the valve covers off.
You will either have one of those, or two large brown relays on top of the motor, one for the AIH and the other for the glow plug relay. You will either have a GPCM or a GPR.
Ohm out your glow plugs and replace them if necessary. It's not that hard to do, just a little time-consuming, especially if it's your first time taking the valve covers off.
I didn't know the glow plugs would affect the running of the truck, so much. I thought they just wanted it enough to start. I'll ohm the flow plugs this weekend. As far as the relay, it's this worse than the two modules? Is there something I should change?
#9
Rhythmic misfire? If so, it's injector time (or shimming the armature plates at a minimum).
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
#10
Rhythmic misfire? If so, it's injector time (or shimming the armature plates at a minimum).
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
#11
Rhythmic misfire? If so, it's injector time (or shimming the armature plates at a minimum).
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
#12
Rhythmic misfire? If so, it's injector time (or shimming the armature plates at a minimum).
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
Rough, rhythmic (as in not "hitting" on one or two cylinders) misfire without smoke until the engine is warm means non-firing injector(s). The excessive noise or rattle is because the next cylinder in the firing order is working for itself and the cylinder before it.
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