Need advice on 97 TJ.

We had similar symptoms along with a bit high a rev on start up. Just the one hesitation and sometimes a stall at the first stop in the cold.

The connection on our TPS was dirty. I sprayed it out with a contact cleaner like WD40 and it worked perfect for 2 years. I had to do it again last summer.

Just pull all the connectors on the throttle body and spray clean them. It is a good thing to do now and then anyway on a Jeep, water and mud have this way of getting in strange places.... ;-)

Mike

Lynn wrote:

I have had a similar problem to the OP ever since I bought my 97 TJ a year and a half ago. I have a standard, (so this has nothing to do with shifting; I would know that), and sometimes, especially if it's cold out, it will hesitate when starting from a stop sign or stoplight in the morning. I'll give it gas, it will act like its going to go normally, hesitate a moment, then resume normal acceleration speed. (I don't get the "jerk" the OP described, though...) I have yet to figure out the cause of this problem, but haven't put much effort into it, either. I figured at first my fuel pump might be dying, but after a year and a half, I would have thought it would be fully dead by now, were that the case. I do seem to recall an error involving my MAP sensor being detected on one of AutoZone's little error code readers when my check engine light was on after high-altitude 4wheeling this summer, though. Could this be related (since someone mentioned the TPS possibly being related, I started wondering about this other sensor also maybe having an effect)? I haven't replaced the MAP sensor, yet, though, because it didn't seem that big a deal to me at the time, and it was kinda pricey.

Sorry, I don't have any help for the OP, but if someone comes up with a good reason this could be happening that could help both of us, that'd be great ;-)

/Bob