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  #21  
Old February 17th, 2014, 08:09 AM
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Time for a YBE upgrade
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #22  
Old February 17th, 2014, 04:17 PM
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For the sake of giving the OP more input, I reached out to a non-forum dweller who has ~20 RRCs in his stables with the symptoms as described in 1st post:


"Stepper motor back of plenum chamber replace or at least remove and clean.
There is also a vacuum line goes from fuel regulator to plenum I think replace with new but also check if it has fallen off.
Clean intake. Remove air intake and spray throttle plate and make sure all lines going in and out are also clear. Also remove gray breather on right valve cover remove mesh clean and replace.

Fuel pump….

Check and clean ALL electrical contacts to and from coil including grounds"
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  #23  
Old February 17th, 2014, 04:26 PM
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ive had some wierd stuff happen very similar to the op, i replaced the o2 sensors and its been a lot happier im using an astro van stepper. ive had the surging under power and it was the tps i was under the impression that the vss in the 14cux didnt play a critical role in operation, ill unplug it and cruise around


now i know why nomar has such low mileage on his hunter
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  #24  
Old February 18th, 2014, 10:23 AM
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Quote:
Originally Posted by Ray_G View Post
For the sake of giving the OP more input, I reached out to a non-forum dweller who has ~20 RRCs in his stables with the symptoms as described in 1st post:

"Stepper motor back of plenum chamber replace or at least remove and clean.
There is also a vacuum line goes from fuel regulator to plenum I think replace with new but also check if it has fallen off.
Clean intake. Remove air intake and spray throttle plate and make sure all lines going in and out are also clear. Also remove gray breather on right valve cover remove mesh clean and replace.

Fuel pump….

Check and clean ALL electrical contacts to and from coil including grounds"
I will do a check of all you have suggested.
I will get back to you with results. I kind of had the same issue with a D90, and it was the stepper motor that went bad.
Thanks
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  #25  
Old February 18th, 2014, 10:45 AM
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Quote:
Originally Posted by McQueen View Post
I will do a check of all you have suggested.
I will get back to you with results. I kind of had the same issue with a D90, and it was the stepper motor that went bad.
Thanks
stepper motor issues definitely causes poor idle ... but given that you truck idles fine in N I would suggest that the stepper motor was perfectly capable of maintaining a steady idle.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #26  
Old February 18th, 2014, 11:38 AM
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I still say the throttle butterfly is carboned up. We used to get this call all the time in the 90's when RRC's where everywhere. It is a common problem come to a stop and it stumbles or shuts off then restarts easily.
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  #27  
Old February 18th, 2014, 11:39 AM
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Quote:
Originally Posted by brn24whl View Post
I still say the throttle butterfly is carboned up. We used to get this call all the time in the 90's when RRC's where everywhere. It is a common problem come to a stop and it stumbles or shuts off then restarts easily.
why would it idle fine in Neutral??
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #28  
Old February 18th, 2014, 02:55 PM
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Quote:
Originally Posted by leastonce View Post
why would it idle fine in Neutral??
They would do that at times why I haven't a clue. It's a nearly free 5 minute fix to try.
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  #29  
Old February 18th, 2014, 03:49 PM
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In the time it takes to read this thread, you could test every component on the EFI system....
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  #30  
Old February 18th, 2014, 04:28 PM
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Originally Posted by Red90 View Post
In the time it takes to read this thread, you could test every component on the EFI system....
true ... but you could prioritise the ones that are most likely to be causing a problem ... and stay warm while doing so.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #31  
Old March 5th, 2014, 02:38 AM
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Why is this entire thread in the Series truck discussion area ? 13 of 30 posts by site team members but no one moved the thread. A classic has the same injection and ignition systems as a 93,94, or 95 Defender but nothing in common with a series truck.
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  #32  
Old March 5th, 2014, 09:16 PM
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Yeah....thats helpful information. Thanks
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  #33  
Old March 5th, 2014, 09:23 PM
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Quote:
Originally Posted by Uncle Douglas View Post
Why is this entire thread in the Series truck discussion area ? 13 of 30 posts by site team members but no one moved the thread. A classic has the same injection and ignition systems as a 93,94, or 95 Defender but nothing in common with a series truck.
Round headlights?
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  #34  
Old March 7th, 2014, 04:29 PM
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  #35  
Old March 8th, 2014, 01:24 AM
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  #36  
Old March 11th, 2014, 02:30 PM
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Dave Johnson
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Did it run fine prior to your tune-up?
If it did, then I would agree on checking the vacuum lines - maybe one got pulled off while the guy was doing the wires/plugs.
I also have had similar problems with a faulty TPS - as suggested by someone else, disconnect it and see if it alters what you are experiencing.
Please post the solution.
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  #37  
Old March 11th, 2014, 05:19 PM
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check the distributor pick up air gap

make sure there isn't too much tension on your throttle cable keeping it open
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  #38  
Old March 11th, 2014, 05:41 PM
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Maybe no-one noticed. I just did. Moved
Quote:
Originally Posted by Uncle Douglas View Post
Why is this entire thread in the Series truck discussion area ? 13 of 30 posts by site team members but no one moved the thread. A classic has the same injection and ignition systems as a 93,94, or 95 Defender but nothing in common with a series truck.
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  #39  
Old March 11th, 2014, 06:27 PM
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My 90 did this and the culprit was a shitty aftermarket distributor, which was nearly new. Replaced with genuine part, fixed it right away.
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  #40  
Old March 11th, 2014, 07:09 PM
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Maybe no-one noticed. I just did. Moved
i didn't notice ....
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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