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inertia switch popped

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Old Jun 21, 2006 | 02:03 PM
  #1  
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kormelistdijetta
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inertia switch popped

I was merging on the interstate after a quick stop and all of sudden the engine died. I tried to restart it wouldnt. About 10 minutes later I tried again and it fired up and ran for 20 seconds and died. I tried a couple more times to the same result sputter and die. Thinking of a clogged fuel filter or bad pump I called the wrecker. 76 dollars later because I was 40 miles away i get home. I start looking around and see the interia switch under the passenger side with a red top. I press the top and the button goes in. Now I fired the truck up and it seems to run fine. Was this my only problem? Does it need replaced? I havent had anyone ride with me in a few days. Is it possible for it to just pop? Thanks for any ideas, Kory
 
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Old Jun 21, 2006 | 04:15 PM
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Seems I've been hearing about the newer Rangers having issues with the inertia switch being just a little too sensitive. What year is your Ranger?
 
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Old Jun 21, 2006 | 04:31 PM
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What Rockledge is saying is probably right. Did you hit a rut, hole or curb anything that might seem like an impact to a sensitive switch.

Madmike33
 
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Old Jun 21, 2006 | 05:21 PM
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Sorry I didnt mention it is a 03 with 27,000miles. I left school and drove about a mile stopped at the convenient store and drove a mile 1/4mile then it stopped. Is it ok to keep driving?
 
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Old Jun 21, 2006 | 05:25 PM
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Is it normal to keep popping until I replace it or what? Maybe I slammed the door and didnt realize it but that seems crazy. Kory
 
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Old Jun 21, 2006 | 06:44 PM
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My 2004 Ranger died 30 miles from town last month. When it arrived at the dealer, they stated that there was a TSB on the inertia switch, and proceeded to replace it free of charge (under warranty).

Pat
 
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Old Jun 21, 2006 | 06:53 PM
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My '03 did the same thing about a mile after I hit a big pot hole.
 
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Old Jun 22, 2006 | 10:51 PM
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My 05' had a bad inertia switch and was replaced free of charge and I recieved a rent a car for free. It was a pain though, I was trying to help my brother move when the truck died on the freeway overpass. it took 2 hours for ford road side assistance to get me to the nearest dealer. Get AAA if you can, its worth it.
 
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Old Jun 23, 2006 | 01:16 PM
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My problem wasn't the switch popping it was my big footed son unplugging it getting into the truck. I finally moved it to the kick panel on the side. No more issues.
 
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Old Jun 24, 2006 | 01:34 PM
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Originally Posted by wtroger
My problem wasn't the switch popping it was my big footed son unplugging it getting into the truck. I finally moved it to the kick panel on the side. No more issues.
You stopped your nuisance problem, but now you might have caused a saftey problem. Unless you oriented the switch in the same direction it was before (against the firewall), it may not respond to an impact like it was designed to. I'm not sure if these switches are omnidirectional, or mainly designed to detect frontal impacts. It may not be a big concern to you, but if you end up in a wreck, you just might want that fuel pump to shut off....

--On an interesting side note, if you ever want a cheap and easy way to confuse and stop a theif, wire a small switch in line (in series) with the inertia switch and hide it in the glovebox or somewhere under the dash. For about $5, you've got a mostly factory-wired kill switch in a part of the wiring no car thief will think to look!
 
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Old Jun 24, 2006 | 06:25 PM
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I checked that out they will work whether hit front side or back regardless of location. I have had them trip going across railway crossings. I have seen them not trip after taking out section of guard rail. That one didn't even set off the air bag. So I think it is crap shoot if any of this stuff works. And it is pretty *@#? unsafe went they shut you down in the middle of the express way at rush hour. So I moved mine.
 
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Old Jun 24, 2006 | 07:18 PM
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I was thinking that swapping in one from an earlier Ranger might be another option. I haven't heard about any intertia switch sensitivity issues on late '90s Rangers. Never any problems like that on my '98.
 
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Old Jun 26, 2006 | 01:37 PM
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Well to follow up I went to the dealer to get a new switch and connector. I returned installed them and so far so good. I havent noticed the wires getting hot like they were before. I found some corrosion in the old connector so Im hoping that maybe that was causing resistance with the connection causing the connector to melt. When I turn the switch on I hear the fuel pump whirring for a couple of seconds so I know that its not bad. I think I will change the fuel filter because its been 27,000 miles and keep an eye on the inertia switch and be done with it. If the connector melts again I think its time to look at the pump or relay. Anyway, Thanks, Kory
 
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Old Jun 26, 2006 | 01:40 PM
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Also to add when I went to the dealer I asked the parts guy about these switches and he stated that there has been problems with them in the past. The one he handed me is the same part number but looks alot beefier than the previous one. Kory
 
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