quick question re:removing plug wire at cap
#1
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
hi
Curious, a lot of youtube videos on troubleshooting a misfire start with the engine running and then pulling one wire off at a time.
Can we do that with our 2005 blazers?
Does it ruin anything?
Do blazer owner/mechanics use this as a valid test?
Or is it easier to just put a timing light on the wire see if the pulse is there?
Curious, a lot of youtube videos on troubleshooting a misfire start with the engine running and then pulling one wire off at a time.
Can we do that with our 2005 blazers?
Does it ruin anything?
Do blazer owner/mechanics use this as a valid test?
Or is it easier to just put a timing light on the wire see if the pulse is there?
#2
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
Can't see why it would hurt anything on a 2005 - I do it all the time when needed - by pulling one wire at a time you are not looking for spark you are seeing if the miss increases by shuting down that cylinder - if the miss doesn't change when the wire is pulled that will be your problem cylinder - most times you can check for a rod knocking in this manner also, pull the wire and the knock quiets down that will be the bad cylinder
![Icon Clapclap](https://blazerforum.com/forum/images/smilies/icon_clapclap.gif)
#5
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
Just letting everyone know I did the test, started it up, pulled a plug wire off at CAP and you could tell FAST that the engine totally sputtered 10 times worse.
So this helps rule out a dead cylinder or a misfire on one of the cylinders as being a plug or plug wire doesn't IT!
??
So this helps rule out a dead cylinder or a misfire on one of the cylinders as being a plug or plug wire doesn't IT!
??
#8
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
yup, I pulled every plug (except one) and you could tell immediately it ran like ***. I couldn't get one in passenger side nearest firewall to come off because of stupid tranny dipstick in the way
who knows maybe that is one, lol
who knows maybe that is one, lol
Thread
Thread Starter
Forum
Replies
Last Post
red1127
2nd Generation S-series (1995-2005) Tech
21
09-08-2018 05:03 PM
futuredoc
2nd Generation S-series (1995-2005) Tech
4
06-28-2010 02:50 PM
jstein
2nd Generation S-series (1995-2005) Tech
5
06-27-2010 10:38 AM
boulonman
2nd Generation S-series (1995-2005) Tech
4
03-05-2007 05:10 AM