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Old 06-07-2012, 12:59 PM   #1
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rough idle with only headlights on

IIm about to run my yj off a cliff.it has a rough idle and stalling with only the headlights on..can someone pleaseHELP!!!!!!!. I think ive went ofer the whole thing from grounds alt and battery so i give up

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Old 06-07-2012, 01:03 PM   #2
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I had this problem once, It turned out to be loose battery terminals, I had to wedge a washer into on to get a complete contact without it shaking loose.

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Old 06-07-2012, 01:35 PM   #3
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I put a new battery on it yesterday every thing tight.seems like it would do it anytime with a loose battery cable....idk
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Old 06-07-2012, 02:01 PM   #4
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check both sides of your battery cables (battery, starter and ground) and maybe you need a new battery? If the voltage drops (like turning the lights on) and she sputters, then your not getting enough V to the throttle body. Could be bad cells in the battery to, take it up to an autoparts store and ask them to "load test" your battery to see how it acts with a heavy load on it.
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Old 06-07-2012, 02:05 PM   #5
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I put new battery on it yesterday.after rpm bottoms out for a bit it will idle back up and drop back down.sometimes it will take a spell and runs goid for a while..how many ground wires come from battery?
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Old 06-07-2012, 02:28 PM   #6
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I will look at it again every thing seems tight.is ther suppose to be a ground coming from battery to frame.there is one to the block
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Old 06-07-2012, 02:36 PM   #7
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Not just tight but clean as well. Have you removed ALL of your cables and either cleaned the ends or replaced any bad cables? This would include every cable going to every point of connection everywhere. Even clean the ground bolts on the frame and block, believe me it WILL make a difference.
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Old 06-07-2012, 03:00 PM   #8
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^ yeah, scuff up those lead terminals pretty good so they mash together when seated. use some sandpaper or a small wire brush. Ground strap to the block is good, as long as your engine mounts are good and grounded to the frame...
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Old 06-07-2012, 03:05 PM   #9
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Something just hit me.the distributer i just replaced was leaking oil really bad down block and onto starter and block ground...i never was really positive it could b a ground .i thought as long as it was metal to metal thats all that counts other than corrosion on battery term
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Old 06-07-2012, 03:39 PM   #10
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Wouldnt run bad all the time though.
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Old 06-07-2012, 03:48 PM   #11
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Quote:
Originally Posted by kylep View Post
Wouldnt run bad all the time though.
Not necessarly, sitting at idle with the lights on your alternator is not putting out the most power it can, which combined with dirty connections means a loss of voltage to the componants that NEED that voltage.

When you rev it up while driving the alternator can put out more power and get the power to those componants even thru dirty connections.

Make sence?
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Old 06-07-2012, 04:10 PM   #12
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Yes...some times when your at 55mph at a real steady speen it will feel like it looses power and gass on it and it clears up..makes good sence
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Old 06-08-2012, 09:11 AM   #13
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Yeeehawwwww i think i fixed it thanks guys the ground was a littli loose and cleand it...i hop im not going to jinx myself
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Old 06-08-2012, 10:36 AM   #14
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(I admit I didnt read all the posts, so may be repeat) I had a problem like this, I found corrosion in my positive cable UNDER the rubber. It had barely started to split but it ruined the cable.
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Old 06-08-2012, 10:48 AM   #15
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I had one similar once where the bat. cable cooroded under the insulation up to about an inch back from the connector. It was really bendy behind the connector, it had cooroded away the copper inside the sleeve and there was harldy nothing left!!!

GOOD FIND by the way!
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Old 06-08-2012, 12:47 PM   #16
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I use the same cable but I am going to replace it I just tried to see if it would work Cleaning it and seemed like it helped it tremendously.i will replace all of cables and run extea ground from battery to frame
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Old 06-11-2012, 09:18 AM   #17
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Yeeehawwwww i think i fixed it thanks guys the ground was a littli loose and cleand it...i hop im not going to jinx myself
Here's hoping you found and corrected the problem!

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