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Old 02-20-2012, 02:11 PM   #1
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Engine Briefly Dies on Hwy.

I was coming back from Miami over the weekend, while driving 75 the engine cut out a couple times. No engine lights, 1/2 tank of gas I slowed down pulled into a rest area, under the hood looked as ok as you can tell without test equipment. I noticed if I drove slower, that I didn't have the engine cutting out. When I drove faster it would start cuttung out again.

I got back on the road, 120 miles from home thinking "The Closer I Get, The Shorter The Tow"

I was thinking maybe my fuel pump with 215,000 miles on it was dying so I filled the tank and kept it full till I got home.

Time for a fuel pump?

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Old 02-20-2012, 02:33 PM   #2
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Mine did that with no codes as well. Eventually it was the TPS. Be sure to buy the Factory one. It comes with new hardware that is worth their weight in gold.

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Old 02-20-2012, 03:36 PM   #3
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What was the cost of the TPS?
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Old 02-20-2012, 03:40 PM   #4
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It was around $45 for my tj from auto zone. If you get it from the dealership its around $120
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Old 02-20-2012, 03:41 PM   #5
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Advance auto parts for 42 bucks with lifetime warranty
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Old 02-20-2012, 03:57 PM   #6
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Whats a "TPS" ? is that the engine computer module?
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Old 02-20-2012, 03:59 PM   #7
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Quote:
Originally Posted by crallscars
Whats a "TPS" ? is that the engine computer module?
Throttle position sensor
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Old 02-20-2012, 04:23 PM   #8
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Good thought, I have had them go on my Dodge/Cumins.

I guess you can check them with an ohm meter to see if the pot is noisy.
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Old 02-21-2012, 04:46 PM   #9
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What was the cost of the TPS?
I spent more than normal, I went to the dealer. I think 68. But I wanted the hardware too. I read on here (Yes I actually used the search tool and they said to buy the factory one. It is hit or miss on Auto Parts stores quality.
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Old 02-21-2012, 04:47 PM   #10
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Quote:
Originally Posted by cadenas View Post
It was around $45 for my tj from auto zone. If you get it from the dealership its around $120
WOW mine was way cheaper. But I'm in Texas
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Old 02-21-2012, 05:06 PM   #11
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I got one off rockauto that seems to be holding up just fine. Mine threw codes before it went though, and generally they have more issues at idle or while changing speed.

Since you said you had more issues at higher speed, i would lean towards a fuel starve condition. Either dying pump or clogged filter. It would be able to deliver enough fuel to keep the Jeep running at idle and lower speeds, but not keep up at high speeds.

Maybe pressure check it while revving the engine to see if it drops significantly?
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Old 02-21-2012, 07:48 PM   #12
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I don't know if you have installed it our not but when you do disconnect the battery afterwords to reset the computer.
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Old 02-22-2012, 08:01 AM   #13
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I do appreciate all the replies.

When it stalled out, I didn't get an engine light, so I haven't looked to see if there are any codes. I just figured it was a pump failing and couldn't deliver enought fule to drive 75mph.

I had a half tank of gas, so I topped it off and the problem seemed to go away? Again my thinking is cooler fuel pump, maybe easier to draw from a full tank?

I'll check the pressure tonight. What should it be? 40ish?
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Old 02-23-2012, 09:58 AM   #14
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I just spoke to my Jeep /Chrysler dealer, the price for a TPS is $120 with a discount. He didn't think it would fix my problem either, he was thinking more along the 'Distributor Plate' or computer as the problem.

I would think either would give me an engine light....your thoughts?

Time to change the fuel pump?
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Old 02-23-2012, 10:12 AM   #15
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I'll second the Distributor Ignition Pickup - I've had it with a past (Chrylser) vehicle, running fine and engine just dies. Coast to the side and restart and seems fine. When it happens it's like a light switch - On then Off.
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Old 02-23-2012, 10:19 AM   #16
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Any chance it could be something as simple as a partially plugged fuel filter?
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Old 02-23-2012, 11:43 AM   #17
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A fuel delivery problem (pump, regulator, filter) usually display themselves with a degrade or progressive loss in power. An abrupt loss (and restore) of power leads me to believe ignition issue. The ignition pickup is an item that can easily be changed (5 min) for a reasonable cost ($25). I'm willing to bet crallscars has a 5 speed and the engine refires being it's "hooked-up". With my previous vehicle it was and automatic would JUST DIE and I would have to use the key to restart. It also became more of a problem (more frequent) with higher (under hood) temps.
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Old 02-23-2012, 12:24 PM   #18
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Thanks for the replies. Yes it's a 5 speed, and when it failed it was a brief on off on, and did it a few times in a row. I reduced speed and noticed it only if I increased speed. I topped off the tank and didin't notice it again, although I kept my speed down.

Wouldn't an ignition problem turn on the service engine light?

The plate does sound like a cheep guess.
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Old 02-23-2012, 02:01 PM   #19
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It won't give a code it just provides an signal for the engine rotation (crank position.) How did you tach behave? I believe it provides the signal for that too.
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Old 02-23-2012, 02:24 PM   #20
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Let me revise that statement - it won't put up a code but, it can be seen by a scan tool if it has TOTALLY failed. Then your engine will crank fine - but you'll have no spark and won't run. The computer doesn't see a fault because it doesn't know the engine is going around. It records things out of spec (codes) only when the engine is running. Being it doesn't see the rotation it doesn't see a fault.
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Old 02-23-2012, 02:45 PM   #21
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Zinger, your thoughts on it being a strong possibulity?
I wasn't looking at the tach, I will next time.
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Old 02-23-2012, 02:55 PM   #22
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If it shut off and came back on - just like flipping a switch - REAL ADBRUPT - Then yes, replace it. I fought with my vehicle for a couple of months before I was directed to replace it (by the parts manager at the dealer desk.) No real pattern - some days fine others it would show up - then go away again. Replaced it and cured.
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Old 02-23-2012, 03:10 PM   #23
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Zinger,
Thanks for the assistance, I have one on order with the local Chrysler/Dodge/Jeep dealer.
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Old 02-23-2012, 05:12 PM   #24
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Good Luck - I hope that's it. It's a simple fix.

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