autolite 25 problems

DCjuggalo

Member

May 18, 2003

169

0

16

Charlotte, NC

Dec 13, 2004

#1

• Dec 13, 2004

• #1

does anyone use the autolite platinum 25's ? ???


i bought them for my 88 302, i wanted to get 24's like u guys talk about but pep boys said the 25 was what i needed.
so anyways i cant get them to fit, i tried for about 10 minutes and gave up. the thread want even catch.. then i put the old ones back in.

 

281pony

Active Member

Aug 31, 2003

2,681

2

46

Oly, WA

Dec 13, 2004

#2

• Dec 13, 2004

• #2

im not familiar with the platinum plugs, are the bodies any different then the standard plugs?

i used autolite 25's with no problems. what kind of heads do you have?

 

DCjuggalo

Member

May 18, 2003

169

0

16

Charlotte, NC

Dec 13, 2004

#3

• Dec 13, 2004

• #3

as far as i know they're stock e7 heads..
i compared the 2 plugs when i had it out and the diameter of the ap25 plug right above the threaded section is alot bigger

damn can't take em back tho cause i threw away the receipt

 

8

87fcoupe

New Member

Sep 27, 2004

57

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0

Dec 13, 2004

#4

• Dec 13, 2004

• #4

First all you don't want platinum.Second autolites 25 is correct plugs if you have stock heads.Look and make sure they are autos 25 NOT 3925's ok.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Dec 13, 2004

#5

• Dec 13, 2004

• #5

efi 5.0's seem to like copper plugs. some people have idle and high rev issues with plats (plat does not conduct nearly as well as copper).

 

tonydalrymple

Active Member

Nov 27, 2004

167

29

39

Salt Lake City, Utah

Dec 13, 2004

#6

• Dec 13, 2004

• #6

HISSIN50 said:

efi 5.0's seem to like copper plugs. some people have idle and high rev issues with plats (plat does not conduct nearly as well as copper).

Click to expand...

Agreed. Last year I installed platinum plugs. 500-600 miles afterward; i developed a higher rpm miss. I found dozens of threads of people with platinum plugs & issues. I swapped in regular Autolite #25's & the problems went away....

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Dec 13, 2004

#7

• Dec 13, 2004

• #7

tonydalrymple said:

Agreed. Last year I installed platinum plugs. 500-600 miles afterward; i developed a higher rpm miss. I found dozens of threads of people with platinum plugs & issues. I swapped in regular Autolite #25's & the problems went away....

Click to expand...

exactly. often the idle is a bit low with plats and people get a high speed misfire (often around 4K-4.5K rpm).

 

PNY PWR

New Member

Jul 23, 2004

522

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0

Wichita, KS

Dec 14, 2004

#8

• Dec 14, 2004

• #8

Never use platinum plugs unless the motor calls for them or came with platinums from the factory.

You want either the regular Autolite 25's or Motorcraft ASF42C's.

 

W

wagnermotors

New Member

May 7, 2010

1

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0

May 7, 2010

#9

• May 7, 2010

• #9

25

i had this same problem but it was with my f150 it was due to the headers i had on there the fatter part of the plugs rubs up on the headers i had to use autolight 2545 they are from the crown vic of the same year and motor my f150 was also a 88

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,158

17,852

224

Massachusetts

May 7, 2010

#10

• May 7, 2010

• #10

Don't use autolites Get the motor craft oem copper plugs. The specs are tighter.

 

281pony

Active Member

Aug 31, 2003

2,681

2

46

Oly, WA

May 8, 2010

#11

• May 8, 2010

• #11

wow... 6 year old thread revival?

didn't know i was on this forum back in 04' lol.

 

MustangLX-5.0

Founding Member

Dec 2, 2000

856

7

38

Lehigh Acres Fla.

May 8, 2010

#12

• May 8, 2010

• #12

Motorcraft plugs FTW. Never had such a smooth running engine til I used Motorcraft plugs. Forget Autolites.. those things are garbage. Always ran into some kind of trouble later on whenever I used those. Not enough copper in them .. if any, I would assume. Best bet, use what was meant for this engine.... after all, Ford makes them.