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#1
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Wrangler starts, runs for 3 seconds?
I've got a 2000 4-cylinder manual Wrangler. The other day, after
stopping for a bit in the back-country of Big Bend National Park, we started experiencing a problem. The Jeep would start and run normally for roughly 3 seconds, then quit as if the ignition were turned off. I checked everything I could at the time, including fuses, relays, fuel delivery, and airflow. Fuel was near full and oil pressure read normal before the engine cut off. Problem is reliably repeatable (meaning I still can't get the blasted thing to run for more than 3 seconds). Couldn't find anything obviously wrong, which makes me suspect it's an "electronic" problem. Does anybody have any ideas what to look for? After waiting for about 8 hours, the Border Patrol finally found us and dispatched a *very* expensive tow truck to haul us back to our RV. With the Jeep malfunctioning, we cut our little vacation short, hooked it up to the RV and drove home. I'm reluctant to take the Jeep off-road again until (1) I know what caused the problem and (2) have a way to fix it (at least temporarily) in the field should it happen again. Thanks for your help, Bill |
#2
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Do you have a security "Sentry" key system? If so, I'm betting it's
related to that. ElAlumbrado wrote: > I've got a 2000 4-cylinder manual Wrangler. The other day, after > stopping for a bit in the back-country of Big Bend National Park, we > started experiencing a problem. The Jeep would start and run normally > for roughly 3 seconds, then quit as if the ignition were turned off. I > checked everything I could at the time, including fuses, relays, fuel > delivery, and airflow. Fuel was near full and oil pressure read normal > before the engine cut off. Problem is reliably repeatable (meaning I > still can't get the blasted thing to run for more than 3 seconds). > Couldn't find anything obviously wrong, which makes me suspect it's an > "electronic" problem. Does anybody have any ideas what to look for? > > After waiting for about 8 hours, the Border Patrol finally found us and > dispatched a *very* expensive tow truck to haul us back to our RV. With > the Jeep malfunctioning, we cut our little vacation short, hooked it up > to the RV and drove home. I'm reluctant to take the Jeep off-road again > until (1) I know what caused the problem and (2) have a way to fix it > (at least temporarily) in the field should it happen again. > > Thanks for your help, > Bill > > > > -- Jerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ |
#3
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Were you using an after-market key, just recut from the original?
I had a key made at Home Depot, not realizing that it needed to the the electronic (encoded) key. It would crank, run 3 seconds, and shut off. As Jerry noted, it may be security related. --james-- |
#4
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It shouldn't start at all if you have the wrong key.
At work we have a cherokee and it's key fits in my ignition...and will turn it, but the KEY-shaped light comes on, on my console....no start though1 "Jerry Bransford" > wrote in message news:Gk4_d.72020$Tt.69316@fed1read05... > Do you have a security "Sentry" key system? If so, I'm betting it's > related to that. > > ElAlumbrado wrote: >> I've got a 2000 4-cylinder manual Wrangler. The other day, after stopping >> for a bit in the back-country of Big Bend National Park, we started >> experiencing a problem. The Jeep would start and run normally for roughly >> 3 seconds, then quit as if the ignition were turned off. I checked >> everything I could at the time, including fuses, relays, fuel delivery, >> and airflow. Fuel was near full and oil pressure read normal before the >> engine cut off. Problem is reliably repeatable (meaning I still can't get >> the blasted thing to run for more than 3 seconds). Couldn't find anything >> obviously wrong, which makes me suspect it's an "electronic" problem. >> Does anybody have any ideas what to look for? >> >> After waiting for about 8 hours, the Border Patrol finally found us and >> dispatched a *very* expensive tow truck to haul us back to our RV. With >> the Jeep malfunctioning, we cut our little vacation short, hooked it up >> to the RV and drove home. I'm reluctant to take the Jeep off-road again >> until (1) I know what caused the problem and (2) have a way to fix it (at >> least temporarily) in the field should it happen again. >> >> Thanks for your help, >> Bill >> >> > > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ |
#5
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Nope, it will start even with the wrong key and then after the code is
checked, the engine will be killed if the code doesn't match. I discovered this when I had an extra key made for my wife's JGC that did not have any kind of security chip. Jerry SteveBrady wrote: > It shouldn't start at all if you have the wrong key. > At work we have a cherokee and it's key fits in my ignition...and will turn > it, but the KEY-shaped light comes on, on my console....no start though1 > > > "Jerry Bransford" > wrote in message > news:Gk4_d.72020$Tt.69316@fed1read05... > >>Do you have a security "Sentry" key system? If so, I'm betting it's >>related to that. >> >>ElAlumbrado wrote: >> >>>I've got a 2000 4-cylinder manual Wrangler. The other day, after stopping >>>for a bit in the back-country of Big Bend National Park, we started >>>experiencing a problem. The Jeep would start and run normally for roughly >>>3 seconds, then quit as if the ignition were turned off. I checked >>>everything I could at the time, including fuses, relays, fuel delivery, >>>and airflow. Fuel was near full and oil pressure read normal before the >>>engine cut off. Problem is reliably repeatable (meaning I still can't get >>>the blasted thing to run for more than 3 seconds). Couldn't find anything >>>obviously wrong, which makes me suspect it's an "electronic" problem. >>>Does anybody have any ideas what to look for? >>> >>>After waiting for about 8 hours, the Border Patrol finally found us and >>>dispatched a *very* expensive tow truck to haul us back to our RV. With >>>the Jeep malfunctioning, we cut our little vacation short, hooked it up >>>to the RV and drove home. I'm reluctant to take the Jeep off-road again >>>until (1) I know what caused the problem and (2) have a way to fix it (at >>>least temporarily) in the field should it happen again. >>> >>>Thanks for your help, >>>Bill >>> >> >>-- >>Jerry Bransford >>PP-ASEL N6TAY >>See the Geezer Jeep at >>http://members.cox.net/jerrypb/ > > > -- Jerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ |
#6
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"Jerry Bransford" > wrote in message
news:Gk4_d.72020$Tt.69316@fed1read05... > Do you have a security "Sentry" key system? If so, I'm betting it's > related to that. Key is the same key I've been using for 5 years. Perhaps a sensor failure of some kind? Bill |
#7
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either the skim key or skim module is falling need to pull fault codes
ElAlumbrado wrote: > "Jerry Bransford" > wrote in message > news:Gk4_d.72020$Tt.69316@fed1read05... > > Do you have a security "Sentry" key system? If so, I'm betting it's > > related to that. > > Key is the same key I've been using for 5 years. Perhaps a sensor > failure of some kind? > > Bill |
#8
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try the crank position sensor
"ElAlumbrado" > wrote in message ... > I've got a 2000 4-cylinder manual Wrangler. The other day, after stopping > for a bit in the back-country of Big Bend National Park, we started > experiencing a problem. The Jeep would start and run normally for roughly > 3 seconds, then quit as if the ignition were turned off. I checked > everything I could at the time, including fuses, relays, fuel delivery, > and airflow. Fuel was near full and oil pressure read normal before the > engine cut off. Problem is reliably repeatable (meaning I still can't get > the blasted thing to run for more than 3 seconds). Couldn't find anything > obviously wrong, which makes me suspect it's an "electronic" problem. Does > anybody have any ideas what to look for? > > After waiting for about 8 hours, the Border Patrol finally found us and > dispatched a *very* expensive tow truck to haul us back to our RV. With > the Jeep malfunctioning, we cut our little vacation short, hooked it up to > the RV and drove home. I'm reluctant to take the Jeep off-road again until > (1) I know what caused the problem and (2) have a way to fix it (at least > temporarily) in the field should it happen again. > > Thanks for your help, > Bill > > > |
#9
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Could be, if the Auto Shutdown relay doesn't get a signal from the
Crank Position Sensor it will shut down at three seconds, as per: http://www.billhughes.com/TJshutdown.pdf God Bless America, ßill O|||||||O ISellJeeps wrote: > > try the crank position sensor |
#10
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It won't even start without a good CPS signal which is the engine's
Master timing signal that provides timing for everything. Without the CPS, it has no idea even when to send spark to the spark plugs. Yes the PDC shuts the ASD relay down in 3 seconds if any of lots of signals are not there but the engine won't even start without a good CPS timing signal. L.W.(ßill) Hughes III wrote: > Could be, if the Auto Shutdown relay doesn't get a signal from the > Crank Position Sensor it will shut down at three seconds, as per: > http://www.billhughes.com/TJshutdown.pdf > God Bless America, ßill O|||||||O > > > ISellJeeps wrote: > >>try the crank position sensor -- Jerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ |
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