Coil on plug question?? - Mustang Evolution

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Old 03-27-2015, 06:48 PM   #1
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Coil on plug question??

Are the cop cylinder specific or will they work on any cylinder
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Old 03-27-2015, 06:53 PM   #2
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they are not specific they will work in any order
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Old 03-27-2015, 06:55 PM   #3
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They are interchangeable and will work on any cylinder.
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Old 03-27-2015, 07:04 PM   #4
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Thanks guys! I thought so but about the time I started pulling them off I was like damn what if!! Lol what's a normal gap on the plugs??
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Old 03-27-2015, 07:09 PM   #5
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Click image for larger version

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Old 03-27-2015, 07:13 PM   #6
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Old 03-27-2015, 07:23 PM   #7
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Chasing a problem that's kicking my *** and two mechanics! I have a miss at 1400 to 1800 rpms at barely any throttle it also does it sitting in the driveway and it has a nervous idle. Duty cycle on the fuel pump should be around 75% mine is running at 95 to 115% that screams a bad fuel pump to me but looking at the plugs they are perfect lean condition would be white! Cars down on power and I promise this is making my head hurt! Any ideas guys anyone had this issue
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Old 03-27-2015, 07:34 PM   #8
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Do a compression test while you have the plugs out.
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Old 03-27-2015, 07:51 PM   #9
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Just pulled all the plugs have two that are light white compaired to the restClick image for larger version

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Old 03-27-2015, 07:52 PM   #10
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Compression should be what on these engines 150 to 165????
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Old 03-27-2015, 07:54 PM   #11
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Those look pretty lean.
They ALL look pretty lean in the pictures.
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Old 03-27-2015, 08:05 PM   #12
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They are light brown two on the passenger side came out pretty white. Like I said on the lap top fuel pumps working it's *** off that being said why aren't all of them white?? Any other ideas?? Iam stressed out I hate trouble shooting!!!!
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Old 03-27-2015, 08:06 PM   #13
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Compression should be what on these engines 150 to 165????
Yes. Somewhere in that range.
It is more important that all of the cylinders are within about 10% of one another.
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Old 03-27-2015, 08:09 PM   #14
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They are light brown two on the passenger side came out pretty white. Like I said on the lap top fuel pumps working it's *** off that being said why aren't all of them white?? Any other ideas?? Iam stressed out I hate trouble shooting!!!!
You can also get a "loaner" fuel pressure test gauge from an auto parts store and do a fuel pressure test.
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Old 03-27-2015, 08:11 PM   #15
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My plan was to get on that tomorrow then a leak down test was next in line! On the lap top this little miss or miss fire bounces all over the place no check engine light at all just a rough idle my first thought was a valve issue but that would be all over the engine. Fuel makes since as far as the effect just trying to figure out the cause! I wish the damn check engine light would come on and help this situation out!! lol
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Old 03-27-2015, 08:23 PM   #16
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Haha.
It will eventually! You are just being impatient and trying to repair your car too quickly. Lol.
Do a fuel pressure test and post the results.
The pressure should be between 30-55 psi and the fuel system should hold it's pressure, with the pump off, for five minutes with less than 5 psi loss.
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Old 03-28-2015, 02:38 PM   #17
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Changed out the ifs with the proper gap cars running better fuel pressure weather on the gas or idle is 31psi
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Old 03-28-2015, 02:41 PM   #18
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And after 5 minutes it fell off 2 psi
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Old 03-28-2015, 02:48 PM   #19
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Haha.
It will eventually! You are just being impatient and trying to repair your car too quickly. Lol.
Do a fuel pressure test and post the results.
The pressure should be between 30-55 psi and the fuel system should hold it's pressure, with the pump off, for five minutes with less than 5 psi loss.
Aren't you supposed to be completely unaware of any issue until that light comes on? This guy is trying to get ahead of the game!!

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Old 03-28-2015, 02:58 PM   #20
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Hard to be unaware when you know there's a problem the lap top shows the effect but no cause.
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Old 03-28-2015, 03:01 PM   #21
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Yeah, your fuel pump is likely "working it's *** off".
The pressure is barely in specs...
If the fuel filter hasn't been changed in a while, you can try that but I'd start shopping for a new pump.
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Old 03-28-2015, 03:05 PM   #22
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Aren't you supposed to be completely unaware of any issue until that light comes on? This guy is trying to get ahead of the game!!

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Haha.
I think that bwright is just trying to keep from having a good story to post in the "Has your Mustang ever left you stranded" thread!
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Old 03-28-2015, 03:57 PM   #23
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Changed the fuel filter yesterday is had no restriction at all! I want to replace this fuel pump with a high volume as Iam going to turbo the car at the end of the year what the highest volume and stay in tank?
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Old 03-28-2015, 04:40 PM   #24
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This is going above my level of expertise, but there are ways of running an in-tank, dual pump setup, like a Terminator, but modifications are required to make it all work.
Depending on the horsepower level that you are trying to achieve, you may need to do something like that.
A lot of people use a single Walbro or a SVT Focus pump, for NA applications, which are direct plug and play replacements. They both flow 255 lph, which I believe is good for about 400ish rwhp.
This would be a good time to decide what your fuel requirements will be and make the necessary fuel system modifications now.
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Old 03-28-2015, 05:44 PM   #25
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Just googled it myself 300 is the largest intank the focus is a 255 the Lincoln aviator is a 255 after that it's pricey like everything else! Lol guys thank you for all the help you have given! At least I know what I need now
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