spark plugs

drivewith2feet · September 5th, 2007, 05:40 PM

1st off being a new member I'd like to say this site is the most useful thing I've found on the net, so I hope you can help.

I just replaced the spark plugs on my 99 v6 and although it runs when reved it cuts out just a little. Any ideas why?

tjames · September 5th, 2007, 05:41 PM

injectors?

drivewith2feet · September 5th, 2007, 05:46 PM

Don't think so ran fine before

tjames · September 5th, 2007, 05:48 PM

did it run normal before you replaced the spark plugs?

drivewith2feet · September 5th, 2007, 05:49 PM

yes

HMUSN · September 5th, 2007, 06:04 PM

they are gapped incorrectly.

drivewith2feet · September 5th, 2007, 06:07 PM

I thought that might be it, but was checking to make sure before I go tare back into it. Thanks for your help!

HMUSN · September 5th, 2007, 06:10 PM

yup..

turp · September 5th, 2007, 06:11 PM

.045 If I remember correctly

drivewith2feet · September 5th, 2007, 06:12 PM

.045 or .054 (this is what the parts store told me)

drivewith2feet · September 5th, 2007, 07:20 PM

After going back and checking the gaps, which are now correct at .054, I took it for a drive and under strain the motor was still cutting out. Along with the plugs I changed the plug wires. I was forced to take all of them off during the replacement after being sold the wrong kit. I found and used the diagram of firing sequence and cylinder numbers to put them back on. After that didn't work I matched the cylinders to the distributor which had cylinder numbers on it. Anyone have an idea of what next to try?

Onemanzu · September 5th, 2007, 07:33 PM

cutting out ... how bad i wanna say its something like bad fuel delivery ... but thats just my opinion

turp · September 5th, 2007, 07:37 PM

Originally Posted by drivewith2feet

After going back and checking the gaps, which are now correct at .054, I took it for a drive and under strain the motor was still cutting out. Along with the plugs I changed the plug wires. I was forced to take all of them off during the replacement after being sold the wrong kit. I found and used the diagram of firing sequence and cylinder numbers to put them back on. After that didn't work I matched the cylinders to the distributor which had cylinder numbers on it. Anyone have an idea of what next to try?

HMMM... .054? Did split-ports have a different gap than 5.0's and single port 3.8's??? My 5.0 and my single-port 3.8 are both spec'ed to a .045 gap...

HMMM again a quick google and I have found answers for both gaps. I guess I would go with what the spark plug manufacturer reccomends.

drivewith2feet · September 5th, 2007, 07:48 PM

thanks for the info

JASonic · September 5th, 2007, 08:54 PM

maybe one of the new plugs is defective out of the box. Its not that uncommon for some reason.

Kenzo · September 5th, 2007, 10:09 PM

go with these demons

https://www.pulstarplug.com/howtobuy...engine=1362721

Onemanzu · September 5th, 2007, 10:12 PM

those are a total waste... cooper ones are the best bet for a sixxer...

itschristorres8 · September 6th, 2007, 12:14 AM

.054!

i hope u didnt get double platinum...or platinum 4...or anyhting bosch
have any idea what you got? brand?
i recommend 765 autolite or the tr55 NGK
yes i know they're copper...thats what you want

juan310 · September 6th, 2007, 12:51 AM

i have the same problem. my rpms peak at 4k. my ignition checks out. ive replaced plugs, wires and coil. now i need to check my fuel pressure. maybe you should too

SSStang · September 6th, 2007, 01:53 AM

If your spark plugs came in a box that looks anything like this....

Then thats your problem.

September 5th, 2007, 05:40 PM	#1
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	spark plugs 1st off being a new member I'd like to say this site is the most useful thing I've found on the net, so I hope you can help. I just replaced the spark plugs on my 99 v6 and although it runs when reved it cuts out just a little. Any ideas why?

September 5th, 2007, 05:49 PM	#5
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	yes __________________ Real drivers use both feet to drive!! Automatics are just plain slow.

September 5th, 2007, 06:07 PM	#7
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	I thought that might be it, but was checking to make sure before I go tare back into it. Thanks for your help! __________________ Real drivers use both feet to drive!! Automatics are just plain slow.

September 5th, 2007, 06:11 PM	#9
turp Moderator 1989 MUSTANG LX 5.0 16.17@86.21(bone stock on street tires) Join Date: Aug 2005 Location: Virginia Beach, VA Posts: 2,893	.045 If I remember correctly __________________ SUPPORT YOUR LOCAL HOOKERS....HUG A TOW TRUCK DRIVER! Donate to lxhatch@gmail.com

September 5th, 2007, 06:12 PM	#10
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	.045 or .054 (this is what the parts store told me) __________________ Real drivers use both feet to drive!! Automatics are just plain slow.

September 5th, 2007, 05:46 PM	#3
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	Don't think so ran fine before

September 5th, 2007, 07:20 PM	#11
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	After going back and checking the gaps, which are now correct at .054, I took it for a drive and under strain the motor was still cutting out. Along with the plugs I changed the plug wires. I was forced to take all of them off during the replacement after being sold the wrong kit. I found and used the diagram of firing sequence and cylinder numbers to put them back on. After that didn't work I matched the cylinders to the distributor which had cylinder numbers on it. Anyone have an idea of what next to try? __________________ Real drivers use both feet to drive!! Automatics are just plain slow.

September 5th, 2007, 07:48 PM	#14
drivewith2feet Newbie Join Date: Sep 2007 Location: Lexington, MO Posts: 9	thanks for the info __________________ Real drivers use both feet to drive!! Automatics are just plain slow.

September 5th, 2007, 08:54 PM	#15
JASonic Hardcore Enthusiast Join Date: Feb 2007 Posts: 1,414	maybe one of the new plugs is defective out of the box. Its not that uncommon for some reason. __________________ http://www.youtube.com/watch?v=yeQLUyYg3EA ^^^^Ok... for a 232^^^^ http://www.youtube.com/watch?v=ah1EbIOdAZE PhotoClub Co-Founder K&N FIPK Dual Flowmasters Xcal III

September 5th, 2007, 10:09 PM	#16
Kenzo Regular Join Date: Aug 2007 Posts: 102	go with these demons https://www.pulstarplug.com/howtobuy...engine=1362721 __________________ Lake Forest Park 206

September 6th, 2007, 12:14 AM	#18
itschristorres8 I Post Entirely Way Too Much 2000 Mustang V6 unknown @390 Join Date: Aug 2006 Location: south florida Posts: 14,342	.054! i hope u didnt get double platinum...or platinum 4...or anyhting bosch have any idea what you got? brand? i recommend 765 autolite or the tr55 NGK yes i know they're copper...thats what you want __________________ www.crtperformance.webs.com

September 6th, 2007, 12:51 AM	#19
juan310 Regular Join Date: Mar 2007 Location: Los Angeles County Posts: 129	i have the same problem. my rpms peak at 4k. my ignition checks out. ive replaced plugs, wires and coil. now i need to check my fuel pressure. maybe you should too __________________ Pioneer Sound System (Comp Speakers-Amp-Deck) - Remote Starter - 5% Tint All Around - Tail Light Tint - SVT Focus Fuel Pump- Mach 1 Chin Spoiler True Dual Exhaust - Flowmaster Original 40s - 3.5 Rolled/Slanted Tips

September 6th, 2007, 01:53 AM	#20
SSStang I Post Entirely Way Too Much 2k2 Mustang V6 Join Date: Feb 2007 Location: TEXAS Posts: 6,014	If your spark plugs came in a box that looks anything like this.... Then thats your problem. __________________ Selling for friend: Vortech Supercharge kit < 100miles.

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