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06-24-2008, 06:14 PM
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#1
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Registered User
Join Date: Jan 2007
Location: new york
Posts: 72
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96 having trouble starting sometimes
it seems weird to me but some times my cherokee just doesnt like to start. i will turn the key and it just cranks and nothing will happen. to make it start i have to either put the gas to the floor or pump the throttle vigorusly. then it will start all rough and some times stay on and other i have to keep pumping to keep it running untill it idles well or it will just die out. i thought it may have been the TPS so i relpaced that awhile ago and it seemed to wok well after that but now the problem is returning. i was thinking maybe the crank sensor?
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06-24-2008, 06:38 PM
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#2
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Registered User
Join Date: Oct 2007
Location: West Virginia
Posts: 2,413
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Did you check your fuel rail pressure?
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06-24-2008, 07:14 PM
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#3
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Registered User
Join Date: Jul 2007
Location: virginia
Posts: 226
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sounds like a fuel issue of some type. From what i hear, crank sensors are a common replacement in jeeps so it may be time to do so.
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99 XJ Sport, Rubicon Express 3.5" Super Flex, JKS adjustable track bar, 15x8 chrome cragar soft 8's, 32x11.50 BFG AT, OME Nitro Charger Shocks, hacked front fenders
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06-24-2008, 07:53 PM
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#4
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Registered User
Join Date: Aug 2004
Location: South Bay Los Angeles, CA
Posts: 2,533
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long crank times are result of fuel or spark issues.
since the spark and coil on the xj's , including my 96', is pretty good, i'd say fuel pressure/flow issues.
on a 96, change the fuel filter. it's very easy, $10 part. it will restore proper fuel volume to the injectors. i'd also add a bottle of techron to the next tank of gas to unclog injectors. you need proper fuel pressure and volume of flow for an injector to run properly. i think your filter is pretty plugged.
at the off chance that the above didn't fix it, then your pressure check valve in the fuel pump is worn out. this site has a few part numbers to replace one yourself in the fuel line. try the filter change and techron first. if the fuel filter has never been changed....it will feel like you dropped a new engine in!
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Newly Painted! Emerald Green '96 XJ 4x4 4.0 HO 5-spd
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Drilled out Stock Airbox / Gauge Cluster Upgrade
Magnaflow Muffler / High-flo Cat / MSD Coil
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06-25-2008, 06:17 AM
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#5
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It's the crank sensor!
Join Date: Nov 2007
Location: Central Minnesota, MN
Posts: 7,974
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Time to test fuel pressure at the schrader valve on the fuel rail. The symptoms you describe are not generally ones of a failing crank position sensor. I suspect a fuel delivery problem.
How many miles on the fuel pump in your Jeep?
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99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
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06-28-2008, 02:51 PM
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#6
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Registered User
Join Date: Jan 2007
Location: new york
Posts: 72
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its got 102xxx on the pump now i dont believe its ever been changed or at least it hasnt since ive had it. i could see the fuel filter being a prob tho i cant remember ever changing it.
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06-28-2008, 03:12 PM
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#7
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Registered User
Join Date: Jun 2008
Location: Tulsa Ok
Posts: 16
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Harbor freight has a Fuel pressure gauge set for 15.00. I used it to troubleshoot my recent problem and it worked very well.
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06-28-2008, 03:31 PM
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#8
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Registered User
Join Date: Feb 2008
Location: north Ga.
Posts: 14,160
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If you've never replaced the fuel filter, and it has 102k on it I would replace it first. then if you're still having troubles you can go from there.
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- '95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
- '99 WJ limited, 4.7L, 3" IRO lift. Bilstein shocks, JK rubicon wheels, 255/70/17's, carolina driveshaft, IRO adjustable control arms, IRO adjustable A-arm
- Sold '00 TJ, 4" lift, rusty's adjustable control arms, skyjacker shocks, rock krawler adj. trac-bar,rugged ridge SYE and RE driveshaft, soft 8's, 35" mud king xt's,XJ HP D30 w/aussie locker, 4:88 yukon gears, hella 500's, rock crusher diff covers
4. 04 Dodge ram 1500 quadcab, yes, it has a hemi.
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96 having trouble starting sometimes
