I have two conditions on my '96 D1 and not sure if they are related but they seem to be. On uphill full acceleration (interstate driving) the engine starts to sputter intermittenly as if a plug is fouling. After wheeling yesterday, when the same sputtering starts , the speedometer drops to zero and stays there, bouncing back to normal randomly. Does this sound familiar?
speedometer and engine issues
- Thread starter latarheel
- Start date
Have you recently replaced the serpentine belt? I had a indy shop do some work on my old DI. They didn't route the serp belt correctly. I had similar issues.
lol I have the same issue, while at highway speeds once In a while it will sputter, let of gas and then give it gas again and all is good. From my search most likely a bad vss.
ptschram
Well-known member
ptschram said:
Why does the speedo transducer make the engine sputter? I hear a bad vss can cause the same issues, the ecu thinks you're going faster than you should and it cuts gas, does the speedo transducer do the same thing?
ptschram
Well-known member
ptschram said:
and....the ECU can't believe your Disco is going 155 MPH.
As an aside, I was watching some reality murder thing with the Mrs. last night. The person was offed by being run over in an alley, which left oil stains all over him. My wife said "Must have been run over by a Land Rover."
but how does the speedo transducer make the engine sputter? I know the vss tells the ecu how fast its going which makes it cut fuel if it thinks ur going to fast but speedo transducer?
Not to hijack this thread - but I have a similar issue and I started to think it was the front drive shaft.
Basically when I am driving and heading up a hill I can sense a vibration kind of like if the car was switching gears back and forth a bunch of times. I do have a misfire issue (Unfortunately showing on cyl 7!) which might be what I am feeling- but I thought Id ask..
Thoughts?
Mines a 2001 D2 with the small motor...........
-Scott
Basically when I am driving and heading up a hill I can sense a vibration kind of like if the car was switching gears back and forth a bunch of times. I do have a misfire issue (Unfortunately showing on cyl 7!) which might be what I am feeling- but I thought Id ask..
Thoughts?
Mines a 2001 D2 with the small motor...........
-Scott
He asked about speedometer, not tachometer.Lake_Bueller said:
It's VSS going out all right. You can verify that by disconnecting it altogether (on the side of the transfer case, next to the parking brake drum) - the speedometer will read zero, but the perceived engine sputter should go away.
In my 96, the plugged A/C drain was causing condensate spilling on the floor on the front passenger side. Apparently, it affected VSS wiring harness, so I would lose speedometer (and all lights to the instrument panel) after about 4 hours' of AC use. Happened to me twice; I replaced the VSS after the first time.Eriazon said:
After the second occurrence, I thoroughly milked the drain nipple that was caked in five-years-old mud - lots of water came out. It seemed to have solved the issue.
p m said:
Thank you. That answered my second question of where the wiring harness was routed. I will have to take a look.
This problem is driving me bonkers. Replaced current VSS with used. Same issue. Bought new. Same issue. The truck drives perfectly when the VSS is unplugged. Leads me to believe a multiplug/wiring issue.
I don't know for a fact that that's where the wiring harness to VSS is routed, but ... where else would it go?
I drove my truck with VSS unplugged for about 4 thousand miles last year...
I drove my truck with VSS unplugged for about 4 thousand miles last year...
p m said:
Is that the best solution to improving MPG or what?
:smilelol:
I just found a connection problem at the plug leading to my vss. I believe it caused pretty much the same symptoms with power loss under load (misfires or injector cut-off). I replaced the fuel pump, filter, Etc. but the same power loss would reoccur intermittently. I unplugged the vss and cleaned all the plug contacts and made sure of a good connection and the power loss and rough running is gone... for now... until it happens again one day.