Hi guys my Z has a carbon fiber hood with air vents and last week I was on the road and it suddenly rains, and I didn't put the anti-rain plastic back under the hood and of course water gets into my engine area and I think some water got suck into my intake! So lately when I fireup the car nothing wrong but after maybe half an hour my car will shuddle and mis-fire! I have mis-fire problem before and I change all six coil pads and lately my cylinder 2 mis-fire and I change a new coil... and today my car mis-fire again.. is it problem of water in the engine? How can I get water out? Or is it my ECU??? I did also install a new coil pad harness... weird.... anyone can give me some help?

 

try replacing your spark plugs

 

I did replaced all 6 already!

 

Any CEL ?

 

No, No CEL! But I do have mis-fire problem before... latest Mis-fire is P0302, I replaced another coil fix the problem and it happens again...

 

Something may have shorted out from the rain and until you find it, you're just going to keep replacing parts.

 

^^++1. Unless you were driving in a hurricane your intake should not have sucked enough water into the engine to cause mechanical damage. The filter should have repelled most of the water and the little water that made it in should have atomized before it hit the cylinders.

Check the hole where the wiring harness goes to the ecu. There is a giant grommet around the harness that will expose the ecu to water if it is not on tight.

 

Yes that's what I was worrying about... I have the unichip installed on top of the ECU and I never know if there are any holes that will get water spill into that area... because I let my carshop do the installation for me! Sucky really...

 

Sure it's not the Unichip?

 

I installed the chip for two years will these kind of piggy back chip broke that fast???