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#1
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fuel pump changed and still not running
i changed out the fuel pump on my 98 cherokee thinking that was my problem but still won't run here's what happened---when i would try to start the jeep it wouldn't start with the first turn of the ignition but ALWAYS started on the second turn---one day i ran the fuel level really low (damn gas prices) and the thing wouldn't start at all---i put about 4 gallons of gas into the tank and still nothing--gauges were reading no gas in the tank even though i know there were at least 4 gallons in there---ideas please thank you in advance for any suggestions |
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#2
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That sounds like the 'very' common bad connection on the CPS of the 4.0
engines. The Crankshaft Position Sensor's plug sits on top of the exhaust manifold and is extremely sensitive to it's connection. They are just computer signal pins and the hot cold cycle affects them. Sometimes you can just unplug it and plug it back and the little scratch pin will make a new contact, but the best is to use a spray contact cleaner. WD40 will work in a pinch, but isn't the best. After cleaning it, I recommend some dielectric grease on the plug's seal skirts to help keep condensation out of it. But then the gauges not reading strongly implies a failed ground strap. The strap is an open mesh strap that runs from the rear of the engine head up to the firewall. I would check it's connections and give it a squeeze to see if the mesh crumbles. Up here in the salt belt, that failure is more common than the CPS one and the engine will sometimes be able to start by stealing a ground. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's shell wrote: > > i changed out the fuel pump on my 98 cherokee thinking that was my > problem but still won't run > > here's what happened---when i would try to start the jeep it wouldn't > start with the first turn of the ignition but ALWAYS started on the > second turn---one day i ran the fuel level really low (damn gas prices) > and the thing wouldn't start at all---i put about 4 gallons of gas into > the tank and still nothing--gauges were reading no gas in the tank even > though i know there were at least 4 gallons in there---ideas please > > thank you in advance for any suggestions |
#3
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try cycling the key 4 to 5 times with out cranking it.
"shell" > wrote in message ... > > i changed out the fuel pump on my 98 cherokee thinking that was my > problem but still won't run > > here's what happened---when i would try to start the jeep it wouldn't > start with the first turn of the ignition but ALWAYS started on the > second turn---one day i ran the fuel level really low (damn gas prices) > and the thing wouldn't start at all---i put about 4 gallons of gas into > the tank and still nothing--gauges were reading no gas in the tank even > though i know there were at least 4 gallons in there---ideas please > > thank you in advance for any suggestions > |
#4
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If It's out of gas, that was a big learning curve for me back in
'72 fuel injected VW. God Bless America, Bill O|||||||O http://www.billhughes.com/ IsellJeeps wrote: > > try cycling the key 4 to 5 times with out cranking it. |
#5
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Are you sure you have fuel pressure to the rail? You might have a bad
ground to the fuel pump. Can you hear the pump? "shell" > wrote in message ... > > i changed out the fuel pump on my 98 cherokee thinking that was my > problem but still won't run > > here's what happened---when i would try to start the jeep it wouldn't > start with the first turn of the ignition but ALWAYS started on the > second turn---one day i ran the fuel level really low (damn gas prices) > and the thing wouldn't start at all---i put about 4 gallons of gas into > the tank and still nothing--gauges were reading no gas in the tank even > though i know there were at least 4 gallons in there---ideas please > > thank you in advance for any suggestions > |
#6
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I had a no start problem after a fuel pump change, after a few days of
trying to figure it out a friend dropped by. He took the cover off of the throttle body and held the flap/throttle open, it started instantly. No problems since....Good luck |
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