Recently my Jeep just had all the fluids zeroed out and new parts installed to fix any leaks. Oil change, Tune up too with new spark plugs and refreshed the cooling system. New radiator and coolant. Needless to say she ran fine the 1st half of the trip fully loaded for a overland camping weekend. No RTT yet but 5 gallons gas, 6 gallons of water, 10x10 pop up, ARB fridge, camping gear and supplies.
I was going up to Lloyd Meadows via 14, 395 to 178. This route is all inclines up to campsite. Fully loaded and done this trip before in my rig seems to have better power going up hill the first half of the trip. I felt the engine oil, gear oil, diff oil, tcase oil and transmission oil changes made difference and freeing up some power.
Once at the campsite the Jeep sat all weekend.
So here is the strange part coming back down and driving down the 395 the Jeep struggled to maintain 60 mph eventhough days earlier I was doing 70 mph going up hill on 395. Also my rig was lighter too. No water and gas in my external tanks. They were empty out to save weight.
Only issue I found on the Jeep after getting home the next day was one back tire was 20 psi and the other 3 we're 26 psi. I aired down 1x time to do a fire road. I must have not filled all the tires correctly. Starting on the trip my tires we're filled to 32psi all four. Can the low air in one tires contribute to going slower on the highway? The rest of the ride home seems to be low in power in passing and getting on the highways. So the second half of the trip the Jeep seems to loose power. 80% of the trip was above 3500 feet to about 8000 feet at campsite.
I know altitude can kill the power but why going up the first day I didn't feel the power loss?
Can anyone help me pin down this possible problem. No check engine light.
2002 TJ, 4.0l, 5 speed, 3.73 gears, 31 tires, 170k miles. 87 octane the whole trip.
I was going up to Lloyd Meadows via 14, 395 to 178. This route is all inclines up to campsite. Fully loaded and done this trip before in my rig seems to have better power going up hill the first half of the trip. I felt the engine oil, gear oil, diff oil, tcase oil and transmission oil changes made difference and freeing up some power.
Once at the campsite the Jeep sat all weekend.
So here is the strange part coming back down and driving down the 395 the Jeep struggled to maintain 60 mph eventhough days earlier I was doing 70 mph going up hill on 395. Also my rig was lighter too. No water and gas in my external tanks. They were empty out to save weight.
Only issue I found on the Jeep after getting home the next day was one back tire was 20 psi and the other 3 we're 26 psi. I aired down 1x time to do a fire road. I must have not filled all the tires correctly. Starting on the trip my tires we're filled to 32psi all four. Can the low air in one tires contribute to going slower on the highway? The rest of the ride home seems to be low in power in passing and getting on the highways. So the second half of the trip the Jeep seems to loose power. 80% of the trip was above 3500 feet to about 8000 feet at campsite.
I know altitude can kill the power but why going up the first day I didn't feel the power loss?
Can anyone help me pin down this possible problem. No check engine light.
2002 TJ, 4.0l, 5 speed, 3.73 gears, 31 tires, 170k miles. 87 octane the whole trip.
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