I have a 2004 Durango Limited with the 5.7 Hemi. Since about 2006 or so, it has stalled when I'm in a car wash or during rain. It seems to happen when water goes down the windshield into the cowl. The way the engine acts, it seems like water is getting sucked into the engine, rather than an electrical short. Any idea? I have see on forums that this is a faily common issue. Thanks!
Model: Durangoj Ltd.
Engine: 5.7L Hemi
Went to Dodge dealership a few years ago, they said they have never heard of this problem.
You nailed it... water really IS getting into the engine! Hi, my name is XXXXX XXXXX welcome to JustAnswer!.As time wears on and vehicles tack on miles, this problem is now becoming a bit more common. Shoddy weather sealing and water management in the wiper cowl area above the engine allows water to spill over the intake manifold area and is then sucked in through leaking intake gaskets. Seepage seems to be pretty consistent from cylinder-to-cylinder, so small amounts of vacuum leakage doesn't affect idle quality for the most part... unless it's sucking water instead of air.The intake manifold on your Hemi is plastic and uses eight formed rubber gaskets that sit into recesses of the intake manifold which is bolted directly to the cylinder head. For reasons I can't explain, ONLY the 2004 Durango has been afflicted with misfire from leaking gaskets, but it may have as much to do with water management as it does with vacuum sealing.To verify this, use a spray bottle or garden hose to introduce water to the base of the intake manifold in small quantities as the engine idles. Misfire will occur when water is aspirated through the very small leaks that have developed between the intake and cylinder head. A fresh set of gaskets will take care of the problem... pretty much forever.As for the water management issue, check to see if you have any missing, torn or misaligned weather sealing in the cowl-to-hood area. A little leakage here doesn't really seem to be a problem unless the intake seals also happen to be seeping.Let me know if you have any questions. I'll be glad to help.Thanks,Ed
30-year Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
Sounds entirely plausible. I was thinking the water was somehow getting through the intake system, but hadn't considered an intake gasket leak. Makes sense. I just tried the spray bottle. I might have noticed a little stammer but not definitive enough to tell. Can't really see the back right portion of the intake manifold with all the crap in the way.
Do you think I've damaged the engine, or is there a risk of that just due to those few cylinders running a little lean and hotter?
I'll get it into the shop soon to have new gaskets installed. Hate to take it to Dodge since they acted like they didn't have a clue what the problem might be. I hate to reward that behavior..
You'll get great marks from me. Well worth it. Thanks again.
Oh no... there won't be any damage. Speed-density fuel systems like your Durango uses will automatically compensate for unintended air entry, so something like that really doesn't behave as a vacuum leak. It just adds fuel to match and the amount of leak will be tiny, becoming less and less of an issue the farther you go into the throttle. No worries.
Thanks, Kevin! Be sure to write if there's anything I can help with. :)
Thanks a ton. I wish it was a cheaper answer, but at least it's likely the right answer.
Thanks bud. Happy trails!