Several months ago I started having a problem with My 95 pathy that goes like this.. She runs fine as long as its cold outside and you aren't going very far.. 15-20 miles or so. The problem is I live 62 miles away from work, so I can go maybe about 30-40 miles, mostly highway driving then it will stutter and die, give it about 20 minutes and it will start up and be good for another 30-40 miles. It seems to only do this when it's been running for a long time or if it is hot out. On a hot day (and I'm talking like as low as 75 degrees) it does it more often, it's been in the 90s recently and I can't even get it to stay running long enough to back down my driveway. I have replaced the fuel filter and fuel pump, full tune up, checked fuses and fluids. I think it does have an exhaust leak (it's very loud) but I do not know how to verify that.
Any ideas on what to try?
Also I did try to drown her back in 2011, Drove into water deeper than I thought it was way too fast, sucked it into the engine, then my wife opened the passenger door and flooded the cab so the computer got soaked, Without thinking we tried push starting it, water shot out the tailpipe and it did start but did not run very long, towed it home and it sat at my house for 4 months and dried out but when I finally tried to start her up (jump start) she did with no problems and has run fine until November or December last year.