Car stumbles/misfires in heavy rain... BUT...

[mbonanni]

Spray Bottle =/= Heavy rain

[RoadWarrior]

Crank sensor is also new (6 months) and adjust to spec. I don't believe water would affect its function unless its housing was cracked or something.

Yeah. I had a similar problem (none e30) where water would get in the connector. Good luck brudda! Hope you get it figured out.


-RW

[Jaxx_]

tried replicating the issue with a spray bottle and some water?

[Cinnabar325is]

Crank sensor?

Crank sensor is also new (6 months) and adjust to spec. I don't believe water would affect its function unless its housing was cracked or something.

[RoadWarrior]

Crank sensor?

[Cinnabar325is]

I did some searching on here and as I expected, I'm not the first to have this problem.

Background: Car runs fine in the dry and in MOST rain situations. However, if it is really raining hard and I'm on the highway, the motor loses all response and often dies. The strange thing is, if I start the car again (still rolling), it always comes right back to life 100% for at least 10 secs before stumbling again.

The obvious suspect is water/moisture in the distributor. Now the cap and rotor are both new and so are the plugs, less than 10k miles. Others mentioned it could be the plug wires, but my car has done this with two different sets of plug wires.

Anytime I check underhood when this happens, the entire underhood area is very dry, it's not like water is being splashed up on the highway. Especially all the way up to the distributor area.

If anyone has any thoughts or ideas, please share! If it's relevant, the car is running BavAuto wires and Miller GenIII MAF on a 2.8

Thanks.