sidriptide
nobody of any consequence
- Location
- western massachusetts
this has been steadily worse for the last few weeks and i cant take it anymore!!
98 XJ, 4.0L, AW4..
it started a month or so ago with what i would call an "intermittent stumble" on the highway.. in the course of an hour it might do it twice at that point. would feel like someone had a strap to the back of my rig and would give a quick gentle tug on it. most of the time it was gentle enough i'd only feel it in the seat.. slowly got worse and sometimes around town it would idle fast and give me a high shift point.. at this point i was getting an intermittent "check engine" light.. the clown at The Zone told me i needed a new fuel cap (and in light of fuel prices i bought a locking cap so he wasnt totally wasting his time)
my gut told me to do a new TPS at that point, it "seemed" to fix it.. for about a week..
the problem returned as a highway issue but it felt like a harder "jerk" on the imaginary strap behind me.. i started thinking fuel pump related..
then on a road-trip to Pa 2 weeks ago i figured out it seems to be throttle-sensitive or at least throttle-position-sensitive.. level ground 70mph relatively fine.. increasing throttle as i start up an incline would almost guarantee a few jerks.. sometimes pretty hard. increased throttle would make it stop, keeping it in the "spot" would keep it jerking sometimes.. at that point it was still just a highway issue..
this week it got worse and is acting up most of the time.. cold idle and drivability seems ok, but after it warms up it gives me a 1400 rpm idle, 1-2 shift at an easy part-throttle is at 2800 RPM and 2-3 shift is around 3500 RPM... it will shift right away if i lift the pedal though. one other thing i'm feeling now is that as i come to a stop it feels like the trany or convertor isnt unlocking/slipping properly and drags the engine RPM down lower than normal idle and it stumbles for a second or 2.. check engine light is on at start-up most of the time, but sometimes it doesnt come on at all.. at this point i'm spending 75% of the time in these operating conditions other 25% it might run fine for no reason..
i'll swap the TPS again just because its got an warrantee on it from Advance, but i'm thinking its a trany module issue.. i had thought that the tranny was controled by the OBD system in the later XJs but i found something in a manual refering to a TCM up under my dash..
i guess i can admit to ignoring the issue because i'm waaay to damn busy but i think i'm running down to the trany shop where we get our tranys from for our shop and see what he has to say..
i spelled out pretty much everything i can about this.. except ive had the rig for about 4 months now and it "seemed" ok for a while.. but i cant see how a dealer could hide a problem like this just to get it off his lot.. so i'm calling it wear-and-tear..
98 XJ, 4.0L, AW4..
it started a month or so ago with what i would call an "intermittent stumble" on the highway.. in the course of an hour it might do it twice at that point. would feel like someone had a strap to the back of my rig and would give a quick gentle tug on it. most of the time it was gentle enough i'd only feel it in the seat.. slowly got worse and sometimes around town it would idle fast and give me a high shift point.. at this point i was getting an intermittent "check engine" light.. the clown at The Zone told me i needed a new fuel cap (and in light of fuel prices i bought a locking cap so he wasnt totally wasting his time)
my gut told me to do a new TPS at that point, it "seemed" to fix it.. for about a week..
the problem returned as a highway issue but it felt like a harder "jerk" on the imaginary strap behind me.. i started thinking fuel pump related..
then on a road-trip to Pa 2 weeks ago i figured out it seems to be throttle-sensitive or at least throttle-position-sensitive.. level ground 70mph relatively fine.. increasing throttle as i start up an incline would almost guarantee a few jerks.. sometimes pretty hard. increased throttle would make it stop, keeping it in the "spot" would keep it jerking sometimes.. at that point it was still just a highway issue..
this week it got worse and is acting up most of the time.. cold idle and drivability seems ok, but after it warms up it gives me a 1400 rpm idle, 1-2 shift at an easy part-throttle is at 2800 RPM and 2-3 shift is around 3500 RPM... it will shift right away if i lift the pedal though. one other thing i'm feeling now is that as i come to a stop it feels like the trany or convertor isnt unlocking/slipping properly and drags the engine RPM down lower than normal idle and it stumbles for a second or 2.. check engine light is on at start-up most of the time, but sometimes it doesnt come on at all.. at this point i'm spending 75% of the time in these operating conditions other 25% it might run fine for no reason..
i'll swap the TPS again just because its got an warrantee on it from Advance, but i'm thinking its a trany module issue.. i had thought that the tranny was controled by the OBD system in the later XJs but i found something in a manual refering to a TCM up under my dash..
i guess i can admit to ignoring the issue because i'm waaay to damn busy but i think i'm running down to the trany shop where we get our tranys from for our shop and see what he has to say..
i spelled out pretty much everything i can about this.. except ive had the rig for about 4 months now and it "seemed" ok for a while.. but i cant see how a dealer could hide a problem like this just to get it off his lot.. so i'm calling it wear-and-tear..