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Author Topic: Jeep "Hickups"  (Read 11450 times)

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lqdtrance

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Re: Jeep "Hickups"
« Reply #30 on: August 03, 2009, 12:44:34 PM »
There was oil in the distributor causing interruptions. Cleaned it out and it is now running fine. I need to get back in there and clean it out with that electrical cleaner though. I think that one of the seals was leaking. Not sure how else oil would get in there. Other than that, when it happens again (sure it will since I have not replaced anything) I will replace the seal or if I cant get the seal then I'll just replace the distributor.
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Offline sharpxmen

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Re: Jeep "Hickups"
« Reply #31 on: August 03, 2009, 01:21:51 PM »
i see, good to know. it's weird that you got those codes though, keep us posted.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
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Offline jfrabat

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Re: Jeep "Hickups"
« Reply #32 on: August 03, 2009, 11:31:35 PM »
Quote from: lqdtrance on August 03, 2009, 12:44:34 PM
There was oil in the distributor causing interruptions. Cleaned it out and it is now running fine. I need to get back in there and clean it out with that electrical cleaner though. I think that one of the seals was leaking. Not sure how else oil would get in there. Other than that, when it happens again (sure it will since I have not replaced anything) I will replace the seal or if I cant get the seal then I'll just replace the distributor.

This happened to me and it ended up frying my coil (the oil also got there).  Kind of sucks to be left in the middle of the road because of asmall thing like this!
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'94 YJ 2.5L with 4" RE lift, Superwinch EPi9.0, FoMoCo e-Fan, SD30 and SD35 w/ARB-5.13, 165A alt., 33" BFG KM2 on 15" AR wheels, Sony sound system, Pavement Ends Hardtop, Hydroboost

lqdtrance

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Re: Jeep "Hickups"
« Reply #33 on: August 04, 2009, 06:51:45 AM »
Yeah, I'm glad it was a small thing instead of a bad pcm or something. I'm just glad to know what was causing it. It was driving me insane looking for it.
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lqdtrance

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Re: Jeep "Hickups"
« Reply #34 on: August 16, 2009, 04:30:16 PM »
Well, I got a new distributor put in but I am still having the same problems. Now every once in a while not only does the tach drop out for a brief second but it does it and stays that way for a while until I either stop and restart the engine or shift to a lower gear and pop the clutch. I am getting really sick of this  :brick:
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Offline sharpxmen

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Re: Jeep "Hickups"
« Reply #35 on: August 16, 2009, 05:00:22 PM »
so it was not the oil in the distributor then? the tach dropping to zero means either you lose power (to the pcm, sensors or the asd) or that your crank or cam won't output a signal (which i assume is not cam since you just replaced the whole distrib). if i were you i would start monitoring the voltage to all of these and have a multimeter by the dash so you can see if you still have power (voltage) when the tach drops (a needle one would be better since it doesn't take a second or so to update like the digital ones) - you can start with the PCM power (i think it's pin 3) and then move to the asd and so on. Can't think of any other way unless it's something really straight forward like the crank sensor for example.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

lqdtrance

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Re: Jeep "Hickups"
« Reply #36 on: August 16, 2009, 05:12:35 PM »
Is there a pin chart? how do I know which one is pin 3? Sorry if its a dumb question.
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Offline sharpxmen

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Re: Jeep "Hickups"
« Reply #37 on: August 16, 2009, 10:02:29 PM »
download the 94/95 fsm from here, the 8W section has all the pinouts and wire colors (page 154) - i hope the pinout is the same with yours but at least the wire colors should be the same. in the meantime you can take the back cover off the connector and the numbers are marked by the wires (only the beginning and end of the row, but it's easy to figure out). the wire color for pin 3 is Red with a white stripe and it's the thicker kind, it's 16ga all the rest are smaller 18ga (and a few that are 20) except for the ground which is also 16 (black and black/white)
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

lqdtrance

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Re: Jeep "Hickups"
« Reply #38 on: August 17, 2009, 11:47:56 AM »
I downloaded the 94/95psm last night. Thanks for the tips and page locations, again.
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lqdtrance

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Re: Jeep "Hickups"
« Reply #39 on: October 02, 2009, 06:23:38 PM »
Update......
I located the problem. The connection on my map sensor was bad. the clasp that holds it in place was loose so every time that wiggled my jeep would cut out. I fixed the problem and now she has been running great.
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Offline sharpxmen

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Re: Jeep "Hickups"
« Reply #40 on: October 02, 2009, 08:53:58 PM »
Quote from: lqdtrance on October 02, 2009, 06:23:38 PM
Update......
I located the problem. The connection on my map sensor was bad. the clasp that holds it in place was loose so every time that wiggled my jeep would cut out. I fixed the problem and now she has been running great.
:thumb: :thumb: awesome. weird that it didn't give you a code about MAP, i would think that since there is no info should generate an error. Good to know that can cause that. glad you got it in the end, must've been frustrating.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

Offline dwtaylorpdx

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Re: Jeep "Hickups"
« Reply #41 on: October 04, 2009, 10:09:11 PM »
Hmm. Well just on a side note, if you disconnect the MAP sensor and then start eh engine it forces the ECm into limp mode and you can gimp on down the road getting about 10MPG  (I've been playing the same game, going to check the distributor in the morning.!)

The only sensor this does not work with so far is the Crank Position sensor. I havn't tried the cam sensor in the distributor.

Dave

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94 YJ - 2.5 Hesco Cam B&B Ported - AX5 Trans w/Centerforce Dual Friction Clutch - 4" Rough Country Lift W/Skyjacker Shocks - D44 Rear/ARB - D30/ARB - ARB Compressor - Warn M8000 in Custom Bumper - Reunell Rear Bumper - Metalcloak 6" Body Armor Kit - Tuffy Console - 265x85-16 Tires - 2M Radio

Offline sharpxmen

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Re: Jeep "Hickups"
« Reply #42 on: October 05, 2009, 12:04:00 AM »
Quote from: dwtaylorpdx on October 04, 2009, 10:09:11 PM
Hmm. Well just on a side note, if you disconnect the MAP sensor and then start eh engine it forces the ECm into limp mode and you can gimp on down the road getting about 10MPG  (I've been playing the same game, going to check the distributor in the morning.!)

The only sensor this does not work with so far is the Crank Position sensor. I havn't tried the cam sensor in the distributor.

Dave


won't start w/o the cam (although i did not try it personally) - it is supposed to time the fuel injectors sequence as well as providing some check for the ECU (looks for a specific sequence between the cam and crank) and if it's off would cut the spark.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

lqdtrance

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Re: Jeep "Hickups"
« Reply #43 on: October 13, 2009, 01:38:29 PM »
Thanks for all the suggestions and info guys!! And yes, it was very frustrating.

Now my jeep is in the shop and I was just told that my computer is shot!!

 :brick: :brick: :brick: :brick: :brick:
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Steve-0

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Re: Jeep "Hickups"
« Reply #44 on: October 16, 2009, 11:03:04 PM »
I have posted some questions on a different thread on hesitation when cold, but this didnt seem to fit there, so maybe I can get somewhere here. I have a 92 Yj 5 speed w/153k 32's with Flowmaster, 4.0l tb and spacer and K&N cold air, 4" lift (i think). I need to do the check on what gearing it has but it seems like it may have been re-geared at one point as I have no problems getting to 75-80 on the freeway if I need to. ANd 5th is not a problem to stay in either. Anyway, after upgrading the TB I noticed a hickup at around 25-2800 RPM. The tach would drop about 10k and buck for a second. I was able to duplicate it by staying at 2500 RPM (as it seemed to drop after some time). Gradually it went away and now just remains a rough spot between 2200 RPM and what seems to be 2800 RPM. Its very slight most of the time but occasionally i get a bucking but cannot reproduce it anymore. I got some advice to check to AIS and the rest of the sensors, but how do I check them? I checked the TPS sensor, I knew how to do that. But the rest, I dont know. Is there a way to test them at the diagnostic plug as it looks like you were mentioning earlier to another fellow 4Banger? I dont want to start buying a bunch of sensors if I dont have to. Any of this sound familiar to anyone?
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