Motorcraft coil boot - 2003-04 Mach 1 Registry Owners Club

jeffrey1 · 05-15-2015, 07:57 AM

Has anyone just changed the coil boots. Ford shows replacement boots just not sure if they come with a new spring inside. I just changed my plugs I was experiencing a miss, I noticed moisture on some of the boots so I blew them off with air. Took out for ride it's definitely got a little better. But the miss is still there at 5k. Also feels like they just slip on like the spring is not clicking into the plugs.

Tom Yancy · 05-15-2015, 03:11 PM

Sorry if this seems like a dumb question, but did you blow the spark plug holes out as well? Water gets in under the coil cover and gets down into the spark plug holes in the valve covers, causing a misfire. I've had this issue with mine and it goes away after thoroughly blowing out all of the water down in the spark plug holes. I haven't replaced my boots, but may in the future as a couple have a bit of rust from the water getting down there.

liv2roc · 05-15-2015, 08:18 PM

I bought one from advanced auto and it came with the spring.

jeffrey1 · 05-16-2015, 06:16 AM

Quote:

Originally Posted by Tom Yancy

Sorry if this seems like a dumb question, but did you blow the spark plug holes out as well? Water gets in under the coil cover and gets down into the spark plug holes in the valve covers, causing a misfire. I've had this issue with mine and it goes away after thoroughly blowing out all of the water down in the spark plug holes. I haven't replaced my boots, but may in the future as a couple have a bit of rust from the water getting down there.

That's a good point I changed plugs they looked dry there was a little rust on the porcelain of maybe 2 plugs. And some moisture on a couple of boots. Are you guys using a dab of Die electric grease on boot. And this was all on the passenger side. I might pull plugs and start over blow all holes and put the new boots on

jeffrey1 · 05-16-2015, 06:20 AM

Quote:

Originally Posted by liv2roc

I bought one from advanced auto and it came with the spring.

After ordering them from one ford dealer they told me the springs was included. So I ordered them did a little more research and of course they do not come with spring you have to buy a new coil for that. Advance auto sell a Autolite premium boot with spring and 5 year warranty I might return the fords and buy them. They look more complete

96gt02 · 05-16-2015, 07:50 AM

Autozone also sells the boots with springs, a single is $6 or a set of all 8 is $30

NastyNate · 05-16-2015, 08:50 AM

Like stated water creeps in the coil covers where the wire comes in the back of the cover. Make sure to seal up the grommet with RTV otherwise you can get moisture and possible misfire .

ab_mach1 · 05-17-2015, 10:45 AM

I use dielectric grease on mine.

IG: @azurebluemach

not a gt · 05-17-2015, 11:43 AM

Quote:

Originally Posted by eruza

I use dielectric grease on mine.

IG: @azurebluemach

+1, every pug change all COP's get a finger swipe.

05-15-2015, 07:57 AM	#1
jeffrey1 Registered User Join Date: Jun 2014 Location: manalapan Posts: 227	Motorcraft coil boot Has anyone just changed the coil boots. Ford shows replacement boots just not sure if they come with a new spring inside. I just changed my plugs I was experiencing a miss, I noticed moisture on some of the boots so I blew them off with air. Took out for ride it's definitely got a little better. But the miss is still there at 5k. Also feels like they just slip on like the spring is not clicking into the plugs.

05-15-2015, 03:11 PM	#2
Tom Yancy Registered User Join Date: Oct 2013 Location: Attalla Alabama Posts: 130	Re: Motorcraft coil boot Sorry if this seems like a dumb question, but did you blow the spark plug holes out as well? Water gets in under the coil cover and gets down into the spark plug holes in the valve covers, causing a misfire. I've had this issue with mine and it goes away after thoroughly blowing out all of the water down in the spark plug holes. I haven't replaced my boots, but may in the future as a couple have a bit of rust from the water getting down there.

05-16-2015, 07:50 AM	#6
96gt02 Registered User Join Date: Nov 2011 Location: Jersey Posts: 442	Re: Motorcraft coil boot Autozone also sells the boots with springs, a single is $6 or a set of all 8 is $30

05-16-2015, 08:50 AM	#7
NastyNate Registered User Join Date: Mar 2008 Location: Jersey Shore Posts: 1,349	Re: Motorcraft coil boot Like stated water creeps in the coil covers where the wire comes in the back of the cover. Make sure to seal up the grommet with RTV otherwise you can get moisture and possible misfire .

05-17-2015, 10:45 AM	#8
ab_mach1 Lorraine's driver Join Date: Apr 2012 Location: Indianapolis, IN Posts: 2,442	I use dielectric grease on mine. IG: @azurebluemach __________________ Instagram: @azurblumach1 SCT X3 with LaSota Racing tune Borla Stingers w/JBA off road H pipe MGW short shifter w/comfort handle Eibach Sportlines w/Koni STR.T's and Maximum Motorsports CC plates

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