- Location
- Charlotte NC
Hey guys. I haven't really dove into the issue at all yet, I have a few ideas in mind to try, but I figured maybe I can tell you guys and maybe you've experienced these symptoms and have solved the issue quickly.
1989 MJ 5spd peugot 2wd (dana 35) 4.0renix STOCK 230k
I am a very detailed person. Deal with it.
THE SETUP:
I started by upgrading the master cyl/booster. from a 2000XJ. Well the reason for the upgrade is because I had a busted brake line that went from the junction block at the back of the truck to the prop valve up front. I had to take the gas tank loose to access the stock line, after getting the line off, I put the gas tank back and made the new line fit. So I will be going back and checking all the fuel lines and clean the fuel filter just to eliminate that possibility.
Up front I had to take the knee knocker panel off from underneath the dash to access the brake pedal area to remove the old cylinder and pedal assembly. There is a computer under there, not sure what it is for, but I am going to check all of my connections underneath that entire area to eliminate that possibility.
I then had to take the air cleaner off and stock vacuum line assembly off (which is all still in tact) to access the prop valve and master cylinder. I have checked for vacuum leaks with a can of brake clean, but it did not show any issue.
THE PROBLEM:
The truck will sit/idle and free rev with no issue, no hissing, bucking or jerking. When you shut the engine off I feel a shutter in the engine as it is shutting off (the entire engine shakes). While driving down the road at WOT I have no issue through any gear.
The problem I have is that around say 1100-1700 RPM the truck starts to buck like its choking out of fuel or lack of spark, my shift indicator/severe misfire light does not illuminate during the issue. This problem arrises when taking off from a stop light at around 1100 to 1500 RPM and then it will come back in every gear at the same RPM. Once at cruising speed in 5th gear you can still feel it doing the bucking, which requires more throttle input in order for it to cease. The truck really is struggling up hill in 5th gear.
THOUGHTS:
SO, what my intentions are to clean out the fuel filter and then take off the throttle body, clean it really well and check every single connection I could have possibly damaged. After that if it is not fixed I will take out the OHM meter and start ohming out my tps and check the operation of the IAC. I am not exactly positive if there is an actual test for that crank sensor (it either has spark or not).
CONCLUSION:
In conclusion I have "bucking" issue between 1100-1700 RPM in any gear, and in 5th gear at cruising speed 45MPH-highway speeds. I have been in the fuel cell area and fuel lines, under the dash on the drivers side and have removed the air box and air cleaner assembly, after doing all of that and putting it all back together, this is where the issue has come up.
Hopefully someone can maybe put this issue to bed really quick because this is my only means of transportation. I can still drive it, I just don't want this issue to really escalate much further than this.
muchos garcias senators!:us::cheers:
1989 MJ 5spd peugot 2wd (dana 35) 4.0renix STOCK 230k
I am a very detailed person. Deal with it.
THE SETUP:
I started by upgrading the master cyl/booster. from a 2000XJ. Well the reason for the upgrade is because I had a busted brake line that went from the junction block at the back of the truck to the prop valve up front. I had to take the gas tank loose to access the stock line, after getting the line off, I put the gas tank back and made the new line fit. So I will be going back and checking all the fuel lines and clean the fuel filter just to eliminate that possibility.
Up front I had to take the knee knocker panel off from underneath the dash to access the brake pedal area to remove the old cylinder and pedal assembly. There is a computer under there, not sure what it is for, but I am going to check all of my connections underneath that entire area to eliminate that possibility.
I then had to take the air cleaner off and stock vacuum line assembly off (which is all still in tact) to access the prop valve and master cylinder. I have checked for vacuum leaks with a can of brake clean, but it did not show any issue.
THE PROBLEM:
The truck will sit/idle and free rev with no issue, no hissing, bucking or jerking. When you shut the engine off I feel a shutter in the engine as it is shutting off (the entire engine shakes). While driving down the road at WOT I have no issue through any gear.
The problem I have is that around say 1100-1700 RPM the truck starts to buck like its choking out of fuel or lack of spark, my shift indicator/severe misfire light does not illuminate during the issue. This problem arrises when taking off from a stop light at around 1100 to 1500 RPM and then it will come back in every gear at the same RPM. Once at cruising speed in 5th gear you can still feel it doing the bucking, which requires more throttle input in order for it to cease. The truck really is struggling up hill in 5th gear.
THOUGHTS:
SO, what my intentions are to clean out the fuel filter and then take off the throttle body, clean it really well and check every single connection I could have possibly damaged. After that if it is not fixed I will take out the OHM meter and start ohming out my tps and check the operation of the IAC. I am not exactly positive if there is an actual test for that crank sensor (it either has spark or not).
CONCLUSION:
In conclusion I have "bucking" issue between 1100-1700 RPM in any gear, and in 5th gear at cruising speed 45MPH-highway speeds. I have been in the fuel cell area and fuel lines, under the dash on the drivers side and have removed the air box and air cleaner assembly, after doing all of that and putting it all back together, this is where the issue has come up.
Hopefully someone can maybe put this issue to bed really quick because this is my only means of transportation. I can still drive it, I just don't want this issue to really escalate much further than this.
muchos garcias senators!:us::cheers: