Motor misfiring after cleaning, any help?

[coreseller]

Yep, I'm an idiot. Here's what happened; I have an 01 Cobra, after messing around a week or so ago with another guy on the road I noticed a coolant smell. Apparently a too long stud on the upper passenger side of the firewall had been pressing and rubbing on one of the coolant lines that run into the heater core. After replacing the hose and trimming down the stud all seemed fine except for the lingering coolant smell which I figured was coming from what had leaked out after the line burst and during the repair. Brilliant me decides on a whim to stop by a self serve car wash since I got an hour to kill while waiting for one of the kid's soccer practice to end. I sprayed the rear passenger side of the motor, mainly around the heater core hose inlets. I'm sure I got other things back there plenty wet. The car started up fine and ran fine the next couple of times I took it out. Yesterday while coming home I noticed it seemed a little down on power and the exhaust note burbled a bit differently. I revved it up a bit and it definitely seemed to be running on less than all eight. I hooked up my code scanner and got nothing, any ideas on what I got wet back there that caused this? I'm an old muscle car guy who isn't very up on the electronics of these Cobras. Thanks.....Mark.

 

[wythors]

I'd pull the spark plug cover and check for water in the plug wells. Blow 'em out with a little compressed air and see if that helps. Also, check the coil packs for water as well.

 

[COBRA90GT]

Yup, what wythors said. You probably got water under the spark plug covers and/or possibly damaged a coil pack. I'd pull the spark plugs and inspect them, along with scanning the car's computer to find out exactly what trouble code is being tripped (suction the water out beforehand, if the spark plug holes are flooded ).

 

[coreseller]

You Guys hit it on the head, I really appreciate it. I was actually going to pull the covers today anyway suspecting what you pointed out was the culprit. That rear plug well was about half full of water/coolant so I'm guessing the wire grommet seal was probably not sitting correctly from the gitgo. Either way, I blew out all 8 plug wells and coil packs just to be safe, put it all back together and she's running great. Thanks again.....Mark.

 

[wythors]

 

[atvcrazy]

Same thing happened to me on my harley truck. I had to replace 2 plugs and get a new coil, $270 at my local dealership. Dont feel to stupid, we all make mistakes.