Jump to content
Free Membership Now Includes Posting and Reply Privileges to Help Meet Your Transportation Needs During the COVID-19 Health Crisis! ×

Moses Ludel

Administrators
  • Content Count

    3,482
  • Joined

  • Last visited

Status Replies posted by Moses Ludel

  1. Moses, I made a video of the Snap-on MT2500 scan tool readings maybe this will help in the RPM issue. Here is some history of the 89 Jeep Wrangler YJ 2.5L.  I have what i call a hiccup when idling or driving every once in awhile. The engine is usually warm to operation temp and will hesitate or act like it dies ( rpm drop at an idle to 200 rpm or so) while idling in the drive way. Sometimes will die but will start right back up and there is days when it dose this hiccup while i am going 25 or 45 mph or what ever speed and has no rhyme or reason. Here is what I have replace or trouble shoot with a multi-meter (analog and digital meters), i check and replace vacuum hoses where needed and replace 4 small hoses on the TBI.  Clean the crank sensor, replace MAT sensor, installed MAP sensor but ended up not using so replace with original. I compression check each cylinder and had 95 to 100 psi per cylinder. I put Seafoam in each cylinder and let sit overnight. Did this twice to get rid of the blow-by and it hasn't consumed any oil in 1000 miles spark plugs look good too, light colored. The Plastic valve cover was replace with an new oil cap as well because of oil being push out thru the oil cap. After the Seafoam treatment I check compression and found it went up to 110 in each cylinder. The engine has no leaks and no noise of any kind that would point towards replacing it.  Also put Seafoam in the gas and poured some into the TBI. This seem to work quite will for smoothing out the idle and performance. I have real good acceleration. Previous owner replace the spark plugs, wires, rotor and cap, O2 sensor, belts, and change all drive train fluids to synthetic and oil change with Valvoline 10-30. I Check grounds under hood and they look great. The engine idles about 800 rpm. I borrowed a Snap-on MT2500 and scan it but really nothing stands out. When the jeep is running I wrote down the readings from the MT2500 and notice the ST Fuel trim 126 and LT Fuel trim 133 steady. I listen to the TBI with the air horn off and sounds like a hissing noise when the engine starts to hesitate or stall, but will start right up. Kind of out of answers other than the TBI needs replace and I have plenty of power on the highway and thru the whole power band from start to 80 mph. I removed the gas tank because the sending unit was showing incorrect gas level so I tested the gauge and the sending unit and found the baffle in the tank was the issue, so I removed it and check all the fuel lines and the vents and all is good and not plugged up. Gas gauge reads correct now and it seems to run pretty good today as I drove it for about 10 miles.  What is your thoughts, thanks.  

    VID_20161029_134408091.mp4

    VID_20161029_134128876.mp4

    1. Moses Ludel

      Moses Ludel

      Mchardtke...I found your post and am answering it now...Thanks for posting at the YJ Wrangler forum.

      Moses

    2. (See 1 other reply to this status update)

  2. Moses, I made a video of the Snap-on MT2500 scan tool readings maybe this will help in the RPM issue. Here is some history of the 89 Jeep Wrangler YJ 2.5L.  I have what i call a hiccup when idling or driving every once in awhile. The engine is usually warm to operation temp and will hesitate or act like it dies ( rpm drop at an idle to 200 rpm or so) while idling in the drive way. Sometimes will die but will start right back up and there is days when it dose this hiccup while i am going 25 or 45 mph or what ever speed and has no rhyme or reason. Here is what I have replace or trouble shoot with a multi-meter (analog and digital meters), i check and replace vacuum hoses where needed and replace 4 small hoses on the TBI.  Clean the crank sensor, replace MAT sensor, installed MAP sensor but ended up not using so replace with original. I compression check each cylinder and had 95 to 100 psi per cylinder. I put Seafoam in each cylinder and let sit overnight. Did this twice to get rid of the blow-by and it hasn't consumed any oil in 1000 miles spark plugs look good too, light colored. The Plastic valve cover was replace with an new oil cap as well because of oil being push out thru the oil cap. After the Seafoam treatment I check compression and found it went up to 110 in each cylinder. The engine has no leaks and no noise of any kind that would point towards replacing it.  Also put Seafoam in the gas and poured some into the TBI. This seem to work quite will for smoothing out the idle and performance. I have real good acceleration. Previous owner replace the spark plugs, wires, rotor and cap, O2 sensor, belts, and change all drive train fluids to synthetic and oil change with Valvoline 10-30. I Check grounds under hood and they look great. The engine idles about 800 rpm. I borrowed a Snap-on MT2500 and scan it but really nothing stands out. When the jeep is running I wrote down the readings from the MT2500 and notice the ST Fuel trim 126 and LT Fuel trim 133 steady. I listen to the TBI with the air horn off and sounds like a hissing noise when the engine starts to hesitate or stall, but will start right up. Kind of out of answers other than the TBI needs replace and I have plenty of power on the highway and thru the whole power band from start to 80 mph. I removed the gas tank because the sending unit was showing incorrect gas level so I tested the gauge and the sending unit and found the baffle in the tank was the issue, so I removed it and check all the fuel lines and the vents and all is good and not plugged up. Gas gauge reads correct now and it seems to run pretty good today as I drove it for about 10 miles.  What is your thoughts, thanks.  

    VID_20161029_134408091.mp4

    VID_20161029_134128876.mp4

    1. Moses Ludel

      Moses Ludel

      Mchardtke...Could not open the video files, but your analysis is very detailed...Please do me a favor and post this note at the Wrangler YJ forum.  I would like to walk through the analysis and respond in a way that others can also benefit.

      Let's pursue this, I'm happy to respond, I'll watch for the post...Also try posting the .mp4 files at the topic.  I'll see whether I can open the files.

      Moses

    2. (See 1 other reply to this status update)

  3. Hi Moses I love reading and learning from your knowledge and have a few questions concerning fuel mileage. I own a 07 mega cab shortbox 4WD 5.9 and I haul camper trailers from US to Canada daily. KN cold air built tranny sorry not sure info about the build other than he says it's now bullet proof!!! Anyways I had a problem week before tranny was done and was told it was my injectors they replaced injectors with aluminum tip aftermarket Bosch. My mileage was very high 30 empty and 15 18 towing acording to the lie o meter overhead since injectors were changed I fight to get 21 and 12 13 towing.oh and first trailer I hooked to after injectors replaced took out tranny so 15 grand in weeks time  BRUTAL! I run stock 235 80 17 oh and I have a 75 gallon fuel cell. Sorry also a automatic. I was owner operator of big truck for 15 years and I drive my mega cab the same 60 65 and can't get my numbers up any. I've tried sMarty on every level to no real gains.contemplating going back to stock??? Will bigger tires give me better mpg please help any and all advise is appreciated

    1. Moses Ludel

      Moses Ludel

      roadhammertaz...Thanks for joining the fuel efficiency discussion...I'm excited about sharing your 5.9L Cummins comments and opening points for a discussion.  Please post this note at the Ram diesel topic on fuel mileage and efficiency:

      Many can benefit from your questions and experience around fuel consumption.  I will reply there in detail, and we can continue the discussion...

      Thanks,

      Moses

    2. (See 1 other reply to this status update)

×
×
  • Create New...