Misfire after wash
07-18-2011, 02:53 PM
#1
3rd Gear Member
Thread Starter
Join Date: Feb 2011
Location: Maryland
Posts: 566
Misfire after wash
Washed my engine bay yesterday and on my way home last night engine start to misfire. The ses light also came on .... cylinder 7 misfire.
When I washed my engine I covered the air filter and alternator in plastic bags. So Im thinking that I need new coils and spark plugs. I am gonna get the oem spark plugs but what brand of coils should I get? Also is there anything else I should look at?
When I washed my engine I covered the air filter and alternator in plastic bags. So Im thinking that I need new coils and spark plugs. I am gonna get the oem spark plugs but what brand of coils should I get? Also is there anything else I should look at?
07-18-2011, 03:06 PM
#2
5th Gear Member
Join Date: Jan 2006
Posts: 2,504
you most likely got water down the plug wells, happened to me every time i tried to wash the engine. pull all your COPs and blow the wells out with compressed air then take it for a test drive. if it's still missing, you may have a shorted coil
07-18-2011, 03:13 PM
#3
3rd Gear Member
Thread Starter
Join Date: Feb 2011
Location: Maryland
Posts: 566
Ok thanks I will try that. It would certainly be cheaper than replacing everything lol. Unfortunately it will have to wait a few days I just have my wisdom teeth removed today so I'm out of it for a few days.
07-20-2011, 02:36 AM
#5
Join Date: Nov 2008
Location: KY
Posts: 40
you have water in the wells, the water level could be high enough that the pos end of the plug is hitting water and arking to your head causing your car to miss. If you keep driving on it with water still in there you can foul some plugs. Do what Brute said and buy some compressed air from walmart (stuff you clean your keyboard/computer with) and blow them suckers out and drive around till dry. If it's still missing even after they are ALL dry you need to replace your plugs 
GL!!
GL!!
07-20-2011, 12:41 PM
#10
Join Date: Jul 2011
Location: minnesota
Posts: 13
2000 gt misfire
ok i have a 2000 mustang gt so i noticed one day my car had a little hesitation so i changed oil n plugs and coolant flush you know normal maintaince stuff previous plugs only had about 25k on them. anyways i went to autozone and got the motorcraft platinum oem plugs they said and put them in. got in car and seem to run fine and then after it got to running temp and was driven for a while the car started to miss like i floored it on interstate and the stuck at 5000 rpm and was just misfiring really bad and wouldnt pick up speed or go past 5k rpm so i thought ok maybe i got bad plugs bought new ones again and new boots and reinstalled and same thing! seems to run fine just when the car gets hot it misfires and the part that really drives me nuts is that there in no engine light! please help im going crazy another issue ive found is well its been about 95 degrees out and 115ish with heat index and when the car is stitting idling with a/c on it starts to overheat and the a/c blows warm and when u drive after a few min the temp starts going back down and the a/c blows cold again any ideas on that as well? thank you