98 Wrangler stalls when driving.

MOONSHINE7015

MEMBER
1998 JEEP WRANGLER

Jeep wrangler, TJ 1998 220,000 2.5

this is a new thing for Eugene - we'll be going along, doing fine - 70 miles/hr or so. And he'll just start to stall. Like he's not getting any gas - and he'll buck until I get him to the side of the road. When idling - he's smooth - but when I try to give him gas to go, he stalls. They have changed the crank sensor - and we thought that was was the problem - but he did it again. Now the kicker is - if you let him sit for about 15 minutes - he'll start up, and run like nothing is wrong! The garage can't duplicate what's happening - so are only going on my description. Has this happened to anyone else?

7 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Lets try the fuel system 1st-have the fuel pressure check

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Wednesday, February 21st, 2007 AT 2:29 AM

ROB66ERT

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18 POSTS

WOW. You have just described my exact problem.I have changed, fuel pump, fuel filter, egr valve, TPS, map sensor, both relays- fuel pump, and IAC relay and IAC motor, pluggs, wires, dist capp, roter, egr sylinoid, ecm, I am stumped!If you figuar this out please let me know, I think I am pretty competent as a mech. Worked on my own veh, since I was 15, now 42 but this one has me stumped, only thing I can think of is now changing the ecu. I promise it will get worse mine is to the point it will run perfect for about 5-10 min, but I can now depress the clutch, turn off ignition, hold in clutch restart and continue running fine all while still moving. Something seems to be resetting when the ignition is turned off and back on. Please keep me posted if you figure this out.

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Monday, March 31st, 2008 AT 1:09 PM

RASMATAZ

MECHANIC
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You sure its not possessed

You have changed the fuel pump but do you know that its producing the correct pressure? You need to monitor it -to catch the culprit on the act or it could be an ignition component that's going whack

You might be right with PCM or get it reflash and see what happens-

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Monday, March 31st, 2008 AT 2:40 PM

ROB66ERT

MEMBER
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Maybe possessed, never thought of that?Lol. Yes I have checked the fuel pressure, 50-60lbs, I have come to the conclusion, that it has to be the pcm. However I did not think about getting it flashed, I called Oriellys and they can do it for me, other than that I don't know. It has to be something that is resetting with the ignition, everytime it is turned off and back on, it is fine for a few min. Got any ideas what else maybe resetting.
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Monday, March 31st, 2008 AT 3:50 PM

RASMATAZ

MECHANIC
75,992 POSTS

Last shot partner-lets try testing out the auto shutdown relay or substitute with a good one/replace it and see what happens-

A problem with this ASD relay will disable the ignition coil/fuel injectors and fuel pump its the main power feed to these components- Location see below