Good Afternoon! I have a 1998 D1 with 162000 miles. I have had it for about three years and have been working on making it more dependable. I have one issue that has reared its ugly head on three occasions. While driving down the road, usually to work, I end up with a dead pedal where nothing above idle happens. It acts like limp home to me. My scanner does not show any codes. I sopke with Charlie Haigh about the problem and he said it might be related to the theft control system. Another crazy thing that may be related is on a very rare occasion I go to start the engine and it will crank over and not start. I take the key out, turn it over and reinsert the key and it starts right up. I doubt that turning the key over makes a difference but nonetheless it starts. Any idea of what is going on? Thanks for your help! Elton
Limp home
- Thread starter Rover Morgan Man
- Start date
You may have two separate issues.
If the engine cuts down to idle during the normal highway ride, but does not stall - try disconnecting vehicle speed sensor (on the side of transfer case). You'll lose speedometer, but this should rule it out.
If the engine cuts down to idle during the normal highway ride, but does not stall - try disconnecting vehicle speed sensor (on the side of transfer case). You'll lose speedometer, but this should rule it out.
i'll second checking the VSS. disconnect and see if the problem goes away. of course, with this being an intermittent issue may take a while to get your answer.
and my '96 would occasionally do the crank but no start then let it sit for a moment and it would fire right up. never have figured out why it does this but it always starts on the second try. it has done this for several years now. though, now that i think about it, it hasn't happened in a while.
and my '96 would occasionally do the crank but no start then let it sit for a moment and it would fire right up. never have figured out why it does this but it always starts on the second try. it has done this for several years now. though, now that i think about it, it hasn't happened in a while.
No, they usually just cut out really bad around 72 mph never stalled. It's the truck thinking your going really fast and trying to slow you down. That's why it never stores a fault. I guess it could, I've never seen it. I always figured that when the VSS started breaking down the ECM saw it as extra pulses.
Good information guys. My truck has never stalled, it simply acts like a clamp around the fuel line, no throttle. After sitting a while, all is well. One of the craziest things my Disco had done. Over three years it has done it three times. Unless it is stupid expensive, I will change the speed sensor and hope for the best. Any more ideas are welcome.
Elton
Elton
a fouled up VSS can have the effect of sending extra pulses to the ECU and making it believe the truck is traveling over 100 mph. At some point (I forget the exact speed) the ECU retards timing as a defense in order to protect the engine.
In this video the bottom number on the phone is what the vehicle is seeing as a speed reading (top is coolant temp). Notice it varies wildly (and I can assure you we travelling <75 mph as we rolled down the Garden State Parkway).
It feels like the engine is 'bogging down' and lacks power.
https://youtu.be/hajB-TZTBIk
In this video the bottom number on the phone is what the vehicle is seeing as a speed reading (top is coolant temp). Notice it varies wildly (and I can assure you we travelling <75 mph as we rolled down the Garden State Parkway).
It feels like the engine is 'bogging down' and lacks power.
https://youtu.be/hajB-TZTBIk