clogged fuel line??

kpkelly

Well-Known Member
Joined
Jul 26, 2005
Location
raleigh
about a week ago i started my 99 TJ Sport up and the first and second time i went through the gears my jeep started sputtering like it wanted to cut off but never did (i can just give it a little gas and it just sort of pushes through). when i got to a stop light occasionally the idle would drop down but after a few minutes it ran fine. for a week now everytime i start it up the same thing happens...anybody have any idea why this might be happening?

could it be a clogged fuel line or fuel pump? maybe a worn out distributor cap and rotor button or spark plugs that need to be replaced??

any help would be appreciated!!!

thanks
 
the check engine light is NOT on...thanks for the website. i will give it a try...any other suggestions??
 
so i replaced the TPS sensor today and both times i have driven it since it is still sputtering...do i need to reset my computer or will it just go away after driving 50-100 miles??

and i agree it was a very easy replacement (as soon as i got the screws busted loose)
 
Does it do this all the time? Cold, Hot, accelerating, idle?

Did you dial in the TPS. On most cars the TPS should register approx .5 volts off the idle lead. Loosen the 2 screws and turn it in either direction while idling to hear it effect the engine.
 
Does your '99 have a distributor cap and coil or is it just got the ignition coil pack with no distributor? My 2000 doesn't have a distributor, but has an ignition coil pack that goes across all 6 cylinders (so there are no plug wires either). Mine started going bad and it would be hard to start. Then it started dying on me while driving. When I changed the ignition coil, it has ran fine ever since.

Another problem I have had is when I would approach a stop, instead of idling like normal, it would rev up to about 2000 rpm. To get it down to normal idle speed, I would have to hit the gas pedal. That problem was the idle air control valve. You probably looked at the IAC when you did the TPS. Was it dirty? You can clean it and it may help as carbon buildup can cause them to stick. I cleaned mine first, but ultimately I had to replace it.
 
this has just started happening in the past week. no i did not dial in the tps. what part are you supposed to turn? there is not that much play in it is there?

also the 99 has distributar cap and plug wires. should i try an replace the distributor cap and rotor button?
 
I didn’t know about dialing in a TPS. When I put mine on, there are two bolts that hold it to the throttle body and there wasn’t any adjustment available.

It could be your distributor/coil/wires/plugs. If they’ve never been changed, it can’t hurt. Only put OEM plugs in it, I learned that lesson the hard way on my Grand Cherokee.

You can check fuel pressure to ensure it is not your pump.

The 2000 model has a camshaft position sensor and a crankshaft position sensor, both of which can affect timing and cause it to run poorly. I do not know about the 99 model since it has a distributor. If it was either of those two sensors, you’d have a check engine light by now.
 
Sounds like the same problem I had with mine. I replaced both o2 sensors and it went away. I know it sounds too easy but I had tried just about everything and finally decided to throw o2 sensors at it and it fixed it imediately.
 
On some cars (they may not be adjutable on all, not sure) they are held on with 2 screws. The TPS will have slots where the 2 screws mount. Then you can rotate the TPS until it gets the right amount of voltage. I've had a CEL come on for a TPS. Sensor wasn't bad, just needed adjusting. The vibration caused the screws to work loose enough for the TPS to move.

Very well could be an O2 sensor or EGR, but this doesn't normally happen until the vehicle warms up.

Couldn't you check the plugs to a spark tester and that would verify the coil is OK?
 
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