NO START PROBLEM wiggling shifter used to work - Ford Powerstroke Diesel Forum

 
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post #1 of 10 Old 12-19-2011, 01:20 PM Thread Starter
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NO START PROBLEM wiggling shifter used to work

several months ago I started having problems with my 97 cclwb4x4 not wanting to start but if I jiggled and wiggled the auto shift handle it would crank right up. now it takes a lot of manipulating to start and does not respond to what I used to do so is there anyone that has had this problemo and what's the remedy? thanks for your time and info.

JOHNSTELLY MEXICO
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post #2 of 10 Old 12-19-2011, 01:36 PM
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Sounds like you need the pnr relay, tells wether its park neutral reverse, have you tried starting in neutral tho for a quick fix?

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post #3 of 10 Old 12-19-2011, 04:56 PM Thread Starter
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yes I have tried it in neutral and it's the same. what is the pnr relay and where is it located?

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post #4 of 10 Old 12-19-2011, 05:15 PM
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Its the park neutral reverse sensor, PRNDL sensor, neutral safety switch, trans range sensor, and prolly some other names for it. It is located on the driver side of the trans, the only sensor on that side. It is where your shifter linkage hooks up to. They are about $55 at a parts store and super easy to swap. When they go out the truck doesn't know what gear it is and won't start.

Have you noticed if you still have reverse lights?

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me

97 F-250 ECSB project truck:250/2's, Gen 3, S468, SD axles, studs/springs, ZF-6
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post #5 of 10 Old 12-19-2011, 05:54 PM Thread Starter
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yessir, got reverse lites so maybe it's this sensor. I craweled under and saw what I think is that sensor. what would happen if I bridged it and put it direct ?

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post #6 of 10 Old 12-19-2011, 06:30 PM
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Quote:
Originally Posted by johnstelly View Post
yessir, got reverse lites so maybe it's this sensor. I craweled under and saw what I think is that sensor. what would happen if I bridged it and put it direct ?
Its the only sensor on the trans on the driver side, right above the pan. Big black thing with a lever on it, connected to the shifter linkage. Also make sure that the plug is in there tight and make sure its clean.

Not quite sure what you mean my bridging it, but you can bypass it by jumping the starter solenoid on the fender. That will start the truck no matter what, but if the sensor is bad then it might/should shift weird. If you were to unhook or bypass the sensor then the truck shouldn't even be able to move, as the tranny won't know whats going on, and it still won't start with the key.



It might also need adjusted, seeing as it won't start but you have reverse lights, cause they are tied into this sensor. I've been troubleshooting problems on my new trans and had broken off the top of this sensor. Installed the new one and the truck would not start at all in any gear. Got to talking to the trans guy and he told me to make sure i had it lined up, which i didn't. Lined it up and now its starting fine. Its possible that its vibrated out of alignment, so this may or may not help you.

What you do is put the truck in neutral and set the parking brake. Crawl under and pop the shifter linkage off the lever, then take the lever off. The sensor slides over a rod, and it is a disc that rotates in the sensor. There is a groove on this little ring/disc, and one on the sensor itself. They have to be lined up perfectly in neutral for it to know what gear your in. To adjust that you loosen up the two small bolts and move the sensor around till their lined up, tighten em up, and put it back together.

Sounds complicated, but its really easy. Without having an actual scan tool that is about the only thing you can do to troubleshoot it. If its lined up perfectly already, then i'd say you have a bad sensor or bad connection. If its not lined up perfectly already, then this should help it.

Or it could always be somewhere else, and for whatever reason wiggling the shifter somehow let it start.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me

97 F-250 ECSB project truck:250/2's, Gen 3, S468, SD axles, studs/springs, ZF-6
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post #7 of 10 Old 01-04-2012, 08:26 AM Thread Starter
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FYI I took my truck to my automotive electrical mechanic and he found the problem and fixed it easily by changing the solenoid which is located on the right fender close to and behind the battery.

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post #8 of 10 Old 01-04-2012, 03:38 PM Thread Starter
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so easy ! why didn't you know?

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Originally Posted by johnstelly View Post
FYI I took my truck to my automotive electrical mechanic and he found the problem and fixed it easily by changing the solenoid which is located on the right fender close to and behind the battery.
this was so easy that I could not believe that you all did not recommend this simple, cheap and easy solution to this problem. thanks anyway for the input. as always, my very best to you all.

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post #9 of 10 Old 01-04-2012, 04:54 PM
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Hmm, the solenoid is a very common problem and easy fix, and i've replaced a ton of em on our OBS's. But when you said that jiggling the shifter lever would make it start, for me it pointed at just the PNR sensor on the trans.

BTW, if you ever have a problem with it not starting you can jump that solenoid with a screwdriver. Just connect the two big posts together and it'll send power straight to the starter no matter what. On the farm truck that was the only way you could start it for a while cause my grandpa was to cheap to buy a new one.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me

97 F-250 ECSB project truck:250/2's, Gen 3, S468, SD axles, studs/springs, ZF-6
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post #10 of 10 Old 01-05-2012, 05:16 PM Thread Starter
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muchas thank you !

hey jimmy, you actually nailed my problem and I didn't see it when you mentioned the solenoid on the fender. I guess I should have had a clue when I heard that clicking sound coming from under the hood but I just didn't know about the solenoid. so very nice of you to take the time and give me the good news/advice. all my best to you and yours from me south of the border.

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