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96 disc. misfire 4 ltr.

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  #1  
Old 01-31-2012 | 08:31 PM
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Default 96 disc. misfire 4 ltr.

rpm surges to 1500 rpm at start up. Scanner shows random misfire clndrs. 5&7-4&8. Also shows "enhanced dtc- chck repair manual''. Misfire occurs when reaching crusing speed (some times at lower speeds) Any help would be great. I dont suspect a fuel problem because I can smell raw fuel during misfire. Thanks again, Antiteck.
 
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Old 01-31-2012 | 09:30 PM
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This sounds like a bad VSS (vehicle speed sensor)
 
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Old 05-24-2012 | 11:53 AM
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still misfires. I replaced plugs and wires- cleared codes and same codes came up. It seems to start missing when up to operating temp when reaching crusing speed. Sometimes it runs a bit better when having been shut off and re-started a few times during the day. The codes show random misfire multiple cylndrs-- over rich. Could it be related to an existing ground prob, (temp gauge haywire and other stuff? Thanks again for all your help so far.
 
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Old 05-24-2012 | 12:34 PM
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How many miles on it, have you done a compression test, what octane gas are you burning? No, it should not be ground related or it would happen all the time.
 
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Old 05-24-2012 | 06:20 PM
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180k mi It recently passed a Ca. smog test so I dont suspect a completely tired motor, I have been using cheap gas as i'm sure the motor is somewhat loose. I will try high test next fillup. The truck uses about a qt of oil every 3000-4000 mi., has a good smooth idle, never has a problem at slower speeds- off roading etc. Does the computer tell it to go into an ''economy mode" at cruise speed? It seems thats when the problems start. Thanks
 
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Old 05-24-2012 | 08:32 PM
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Originally Posted by Spike555
This sounds like a bad VSS (vehicle speed sensor)
I already answered you once, you have the classic bad VSS symptoms.
Best of luck to you.
 
  #7  
Old 05-25-2012 | 09:53 AM
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A vss is $200 AT NAPA. Autozone can't even order one. Anyone know of a reasonable source for parts on the west coast?
 
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Old 05-25-2012 | 10:56 AM
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Land Rover Parts, Accessories and Information


Unplug the VSS, drive the truck for a day, does it still act up?
Yes, plug it back in, thats not the problem.
If not, replace it.
 
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Old 05-26-2012 | 11:50 AM
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Thank You Mr. Spike. I didn't have to drive it for a day after disconecting the vss. Only about 100 ft. Now I can focus on some of the minor glitches, and can probably expect to save a lot of money on gas. Have a great holiday weekend
 
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Old 05-28-2012 | 03:49 PM
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So was it the VSS or is it something else?
 


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