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General Forums => The Mess Hall => Topic started by: Got Wood? on September 09, 2006, 05:34:51 PM

Title: no power
Post by: Got Wood? on September 09, 2006, 05:34:51 PM

This afternoon when I left work I had no power, which it seems like I get that alot when the engine is cold, about 10 miles into the trip I could feel the engine surge and then after that it ran great with plenty of power. When I say no power I mean pedal to the floor and doing 55-60 on the interstate. 90 yj tbi 2.5 with ax5. Anybody have any ideas? thanks

Title: no power
Post by: Jeffy on September 09, 2006, 06:24:21 PM

Start with the basics.  Fuel & Spark then work from there.  Does it idle?

Title: no power
Post by: Got Wood? on September 09, 2006, 08:12:03 PM

idles fine, I just have to keep the rpms up to keep accelerating. It doesn't have no power at all, it's just lacking alot.

Title: no power
Post by: dunklervogel on September 09, 2006, 10:01:20 PM

Would a dirty air filter have any effect like this?

Title: no power
Post by: ragincajun on September 12, 2006, 10:31:00 AM

to me if the air filter were restricting it would not idle fine, but thats cheap to change out anyway.  Check that first as a paper filter is not much.  After that I would check your fuel system.

Title: no power
Post by: chardrc on September 12, 2006, 03:10:34 PM

Quote from: "ragincajun"

to me if the air filter were restricting it would not idle fine, but thats cheap to change out anyway.  Check that first as a paper filter is not much.  After that I would check your fuel system.

i have a 90 yj 3.5l and when i got it it ahd a paper air filter that was totaly cloged with crap... looked like a rats nest :shock:... and it oviously wasnt good but it didnt efect the idle..

Title: no power
Post by: 4X4DAVE on September 12, 2006, 03:26:57 PM

You should change your fuel filter while your at it. I did mine last week and my filter was really bad, blew out dark fluid and not that easy to blow through. Filter cost under $10 and really easy to change. Its right in frount of the rear wheel and all you need is a 10m socket and a flathead screw driver. As long as your Jeep is 95 or older because 97 and newer do not have external fuel filters.

Title: no power
Post by: chardrc on September 12, 2006, 03:43:46 PM

thats a good idea.. now that i think of it.. i may do this on miojne. and ill get a nice smaler fuel filter so i dont have the huge metal one

Title: no power
Post by: Got Wood? on September 12, 2006, 05:25:34 PM

I just changed my air filter last week, and I had the problem before and after the change. I probably need to change the fuel filter anyway, since I don't know the history of it. But I don't think that is going to solve my problem, it only runs week for about the first ten minutes, after that it runs fine.

Title: no power
Post by: yellowta on September 12, 2006, 09:13:00 PM

My ole dodge dakota did that, would be humming along fine till it warmed up, then wham, it was like I was dragging a boat.  Ended up being the throttle position sensor. Get your codes checked. Mine didn't even thow the check engine light.

Title: no power
Post by: dunklervogel on September 12, 2006, 09:13:32 PM

I'm not completely sure how to explain this but I've heard it before:  As the engine is heating up the computer has the engine running differently.. like warm-up mode or something  ..  then once its to regular temperature it changes some settings and is in "regular mode".  I'm wondering if there is some issue with a sensor or anything during the "warm up mode" of the jeep that may be causing your problem?  But you're right if it was something like a filter of any kind I'd think the problem would be apparent at all times not just in the first 10 mins of operation.

I'm not the most mechanical literate so I may be completely wrong ..  :roll: