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Old 07-17-2013, 12:45 PM   #1
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Engine Skip

I searched through this forum and found a slew of answers, a lot of which owners paid for repairs, some even multiple times. I'm trying to avoid paying for unnecessary repairs and wanted to post this somewhat generically to get an idea of what may be wrong initially:

I have been having a hard start for years. But always starts on second attempt, always a little drag and longer hold down on key to get it to start. I didn't know if it were from some of the minor mods i did - throttle body spacer, header, cold air. Jeeps got almost 210K on it. 98 TJ. Anyway, driving on the highway around 65-70mph slowing down to 50 to a transition ramp to another highway and the engine skipped once and came back, the engine light also came on. I immediately pulled over, turned it off, checked all fluids, no problems, hoping to clear engine light. Started it, did not clear, drove home 20 miles and it skipped once every maybe 5 miles.

I'm going to disconnect the battery cables, reconnect, remove gas cap, put it back on with the assumption I will still ahve the same problem.

Anyone no for sure what this is? i haven't had the code read yet. I personally think its the fuel filter or fuel pump... which as you know are not exactly easily accessible for replacement (like say older cars).

TIA,

Aaron

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Old 07-17-2013, 12:59 PM   #2
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First of all get that code read before you disconnect the battery. I'm having a similar issue but without CEL illumination. I am going to drop my tank because I have changed everything known to man and still have the problem. I firmly believe that as another member stated I have "trash" or debris in my tank and that after long periods of the pump running it blocks the filter. For me turning the key off (thus shutting off the fuel pump) then back on, clears my issue for a little while.

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Old 07-17-2013, 03:16 PM   #3
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Try turning the key to the run position, count to 5 and start the jeep, if it starts up it might be the fuel pump. Counting to 5 gives the pump a little extra time to pressurize the fuel rail.
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Old 07-18-2013, 09:44 AM   #4
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Quote:
Originally Posted by Big Sarge View Post
First of all get that code read before you disconnect the battery. I'm having a similar issue but without CEL illumination. I am going to drop my tank because I have changed everything known to man and still have the problem. I firmly believe that as another member stated I have "trash" or debris in my tank and that after long periods of the pump running it blocks the filter. For me turning the key off (thus shutting off the fuel pump) then back on, clears my issue for a little while.
Thank you sir, roger that on the code - I understand why. Like I said I've got 210K miles and with the parts being inside the tank I've never changed them, so i think we are on teh same page with clogged filter and maybe bad pump. My hard start for the past 5 plus years was remedied as you state above.

Thanks again, Aaron
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Old 07-18-2013, 09:46 AM   #5
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Originally Posted by JimsJeep View Post
Try turning the key to the run position, count to 5 and start the jeep, if it starts up it might be the fuel pump. Counting to 5 gives the pump a little extra time to pressurize the fuel rail.
Thanks, makes perfect sense, my brain works a little slower than most and that hadn't come to me yet. I appreciate the response - saves me time!

- Aaron
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Old 08-05-2013, 08:55 AM   #6
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This ended up being a throttle position sensor.

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