Barry Richards Posted March 4, 2012 Share Posted March 4, 2012 When it is raining hard and there is a lot of water on the roads, something gets wet on my 1998 es300 and it will run roughly for a few minutes then its fine. Then it will happen again and run rough for a few seconds and then be fine...any ideas on what it might be? Thanks for any help! Quote Link to comment Share on other sites More sharing options...
LexPa Posted March 4, 2012 Share Posted March 4, 2012 It will be interesting to hear what people have to say on this. My mothers Lexus, same year has done this once and only once. This happen while I was attending the Toyota program at UTI so I asked the instructor what his thoughts where, his only conclusion is the exhaust would get cooled too fast and the donut gasket between the down pipe of the headers and the rest of the exhaust would leak and make the car run poorly. I couldn't believe this 100% but I did tighten those bolts up a little more and I has yet to happen again. Hope tha shears some light on what it could be... Quote Link to comment Share on other sites More sharing options...
gbhrps Posted March 9, 2012 Share Posted March 9, 2012 This sounds like an electrical problem in the ignition system that gets momentarilly shorted out. For instance, a sparkplug wire that gets damp, shorts to ground, and then because of engine heat, dries up and is fine until more spray lands on it. In older cars with distributors, it was not uncommon for this to happen when it rained, particularly if the rotor cap had a small crack in it. I'd have the ignition wiring looked at for cracks and corroded wiring. A 1998 has 12 year old ignition wiring and components that may need updating. Good Luck! Quote Link to comment Share on other sites More sharing options...
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