91 RRClassic intermittent stall-TPS issue? - Defender Source
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Old December 28th, 2008, 09:30 PM
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91 RRClassic intermittent stall-TPS issue?

Hi all. Sorry for the RR-related post. D-web is unhappy for the moment. Mods remove or move this if you see fit to do so, no worries:


RRC with stock 3.9 on acceleration have had the engine just cut right out. Not sure if it is really stalling as it picks right back up again after a split second without use of the key. More like a BIG hiccup. Then it throws a code 19 indicating MAF or TPS. Test of those per the manual and all looks okay except for the TPS which has a "dead spot" about the same place in the pedal travel as this occasional problem. The voltage swings up until the pedal hits this spot and then it drops to zero and begins climbing again. I figure this is the problem but thought I would share and see if anyone has any related experience or wisdom to share before I shell out the $$$ for a new TPS- or the $ for a good used one

Thanks
Ren
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  #2  
Old December 28th, 2008, 10:28 PM
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Crazy Rays trip ? I need to go this week.
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Old December 28th, 2008, 10:56 PM
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I'd replace the TPS (don't bother cleaning it, it seldom works) as well as go through the ignition diagnostic procedure in the workshop manual. Might also want to check your vacuum lines, one of my rrc's had a nasty occasional stumble due to a very slightly cracked vacuum advance tube. I may still have a spare tps in the shop, I'll look for you tomorrow.
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Old December 28th, 2008, 11:25 PM
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Sounds like TPS to me.
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Old December 29th, 2008, 09:03 AM
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thanks tony. let me know. need to come by your place anyway and look @ the LWB for a friend.

Quote:
Originally Posted by Abrooks
I may still have a spare tps in the shop, I'll look for you tomorrow.
Follow-up Post:

Quote:
Originally Posted by Maryland 110
Crazy Rays trip ? I need to go this week.
Doug, can't justify the time off this week, though hoping I have a reason to call in sick on Friday...
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Old December 29th, 2008, 09:31 AM
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Quote:
Originally Posted by Ren Ching
thanks tony. let me know. need to come by your place anyway and look @ the LWB for a friend.
Vultures are circling, best hurry.
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  #7  
Old December 29th, 2008, 12:20 PM
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I had a similar problem in my 1991 RRC. I replaced all the ignition components and it fixed it. I almost did not replace the cap as it looked brand new. But upon farther inspection it had carbon traces inside the cap. I also replaced the rotor button as I have had many problems with them in the past.
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