Why does my truck have a huge sputter/misfire in Neutral (?) at like 2800 rpms?
#1
Why does my truck have a huge sputter/misfire in Neutral (?) at like 2800 rpms?
If I floor the truck in gear, it pulls great and sounds great. If I floor the truck in neutral, half the time it will sputter/misfire (??) real bad for a second, then it will clear up and floor fine til it hits governor. Sometimes it spits some oil-smoke out too. But the other half the time it does this, there is nothing. So what the heck is going on?
Matt
Matt
#2
#3
#4
#5
Alright so heres another update.
So recently the truck was ran VERY low on fuel. So low that while I was sitting on an inclined ramp, it was sputtering trying to accelerate up it from a stop. So I parked it at home and filled up a 2gal jug and put 2 gals worth of diesel in.
Since that day, when I've cold-started my truck twice, it POURED out smoke. It looks whitish from the cab, but by time I ran out there it looked bluish. It cleared up after a minute.
Also, now I have a damn oil leak coming from somewhere!! I've never had ANY leaks on this truck, and now all of a sudden my newly sealed driveway is getting trashed.
BTW, this truck is not driven very often at all.. few times a month maybe. I'm working on uploading the video.
---AutoMerged DoublePost---
Heres the actual cold-start (60*f).
It's NEVER cranked that long, and it's never had that horrible stumble on start-up either.\
Part 2: the stumble at 2800rpms
EDIT: Also, when I ran the fuel tank super low, the water in fuel light came on non-stop. I drained that and it hasn't come on since.
So recently the truck was ran VERY low on fuel. So low that while I was sitting on an inclined ramp, it was sputtering trying to accelerate up it from a stop. So I parked it at home and filled up a 2gal jug and put 2 gals worth of diesel in.
Since that day, when I've cold-started my truck twice, it POURED out smoke. It looks whitish from the cab, but by time I ran out there it looked bluish. It cleared up after a minute.
Also, now I have a damn oil leak coming from somewhere!! I've never had ANY leaks on this truck, and now all of a sudden my newly sealed driveway is getting trashed.
BTW, this truck is not driven very often at all.. few times a month maybe. I'm working on uploading the video.
---AutoMerged DoublePost---
Heres the actual cold-start (60*f).
It's NEVER cranked that long, and it's never had that horrible stumble on start-up either.\
Part 2: the stumble at 2800rpms
EDIT: Also, when I ran the fuel tank super low, the water in fuel light came on non-stop. I drained that and it hasn't come on since.
Last edited by 85_305; 09-06-2011 at 09:39 PM. Reason: Automerged Doublepost
#6
If you watch your volts gauge on the first video, your GPR is still active. This tells me your glow plugs are getting tired. The white smoke is just a motor that was cold that didnt have all the glow plugs working.
The other video could be an ICP issue. Could be a fuel issue. Need to do more digging.
Throw a can of diesel clean in the tank and fill it up. Change the fuel filter and drive it a bit.
NEVER park it at low fuel levels, when you do that its a breeding ground for algae to grow in the tank, water to build up and rust to flake off.
I see nothing to be overly concerned about right there. The white smoke was just cold motor, the blue smoke is just incomplete combustion. Drive the truck for a while and I bet 99% of that will go away.
The other video could be an ICP issue. Could be a fuel issue. Need to do more digging.
Throw a can of diesel clean in the tank and fill it up. Change the fuel filter and drive it a bit.
NEVER park it at low fuel levels, when you do that its a breeding ground for algae to grow in the tank, water to build up and rust to flake off.
I see nothing to be overly concerned about right there. The white smoke was just cold motor, the blue smoke is just incomplete combustion. Drive the truck for a while and I bet 99% of that will go away.
#7
If you watch your volts gauge on the first video, your GPR is still active. This tells me your glow plugs are getting tired. The white smoke is just a motor that was cold that didnt have all the glow plugs working.
The other video could be an ICP issue. Could be a fuel issue. Need to do more digging.
Throw a can of diesel clean in the tank and fill it up. Change the fuel filter and drive it a bit.
NEVER park it at low fuel levels, when you do that its a breeding ground for algae to grow in the tank, water to build up and rust to flake off.
I see nothing to be overly concerned about right there. The white smoke was just cold motor, the blue smoke is just incomplete combustion. Drive the truck for a while and I bet 99% of that will go away.
The other video could be an ICP issue. Could be a fuel issue. Need to do more digging.
Throw a can of diesel clean in the tank and fill it up. Change the fuel filter and drive it a bit.
NEVER park it at low fuel levels, when you do that its a breeding ground for algae to grow in the tank, water to build up and rust to flake off.
I see nothing to be overly concerned about right there. The white smoke was just cold motor, the blue smoke is just incomplete combustion. Drive the truck for a while and I bet 99% of that will go away.
The thing is, I can almost believe it's GP's because it's been cool lately... 50's... and thats when it started acting funky on start-up. But the thing is, the gp's are all brand new!! The previous owner had them installed, not sure when, but they are newer! And just last winter I didn't have ONE issue with my gp's.
You are right, it's a fuel issue though. I stuck my face in the smoke upon cold-start today, and it was raw fuel... NOT oily smelling like I was thinking.
I generally always run diesel kleen in my tanks, but it's been a minute since I've totally filled them up, so I haven't been adding diesel-kleen. I'll give that a try though.
#8
#10
I also noticed that yesterday if I would romp on the throttle to about 2500 rpms or so, it would puff a good puff of black smoke.. all stock 'cept intake/exhaust.