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Mustang Forum >> Ford Mustang Tech >> 5.0 Mustang >> got a ?

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got a ? - 5/16/2008 10:31:22 AM

bigjwasup

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i have a 94 gt 5o and i put autolite plugs in and new wires and i hear like a taping sound hears some one say its a spark knock what is that and what kind of plugs are good it had motorcraft in it before

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RE: got a ? - 5/16/2008 10:41:53 AM

1990NOS!

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ngk--- thats all i've ever used in my car... they are about $2-$3 a pop... i run n20 so i have a cooler burning pug... for a typical street mustang i'd run a 8 or a 9 in it...

You didn't get platinum did you???

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RE: got a ? - 5/16/2008 11:13:24 AM

bigjwasup

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no i did not get platiums the also has like a miss to all wires are right i checked thought it might be just ****y plugs

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RE: got a ? - 5/16/2008 11:14:02 AM

Stevens91gt

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i bought the new E3's and i like them a lot
but they're pretty $$$

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RE: got a ? - 5/17/2008 8:48:50 AM

bigjwasup

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have u guys heard of a spark knock before what is it

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RE: got a ? - 5/17/2008 10:00:58 AM

AdderMk2

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autolite 25's will not give you spark knock. They are also one of the better plugs that you could have instaled.

Are you sure that you put them all in tight enough? Are you POSITIVE that you have the firing order correct?

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RE: got a ? - 5/18/2008 6:27:19 AM

bigjwasup

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yea i rechecked them ant there tight car has a rough ldle like a miss

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RE: got a ? - 5/18/2008 7:21:58 AM

AdderMk2

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youve probably got a cracked plug

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RE: got a ? - 5/18/2008 11:12:30 AM

StrongStang50

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did you check the GAP???? Even tho they all say they are "pre gapped" by being shaken around in the boxes it changes the gap.. I would take them back out and check every gap to make sure its right on before yoou make any assumptions..

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RE: got a ? - 5/18/2008 5:29:08 PM

PJC Racing

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Edit: My original statement was completely incorrect and I removed it to ensure that the information does not mislead anyone.

I would check with what Adder said, you may have a cracked plug. Start the car in a dark area and check to see if you have spark where it should not be.

< Message edited by PJC Racing -- 5/18/2008 5:38:47 PM >

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RE: got a ? - 5/18/2008 5:44:14 PM

Jasperstang308

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quote:

ORIGINAL: AdderMk2

youve probably got a cracked plug

agree here. pull them all again and see

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RE: got a ? - 5/18/2008 8:19:23 PM

AdderMk2

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quote:

ORIGINAL: PJC Racing

Edit: My original statement was completely incorrect and I removed it to ensure that the information does not mislead anyone.

I would check with what Adder said, you may have a cracked plug. Start the car in a dark area and check to see if you have spark where it should not be.

I'm glad you caught that.... considering 94/95's had E7 heads.....

(cobras use 764's)

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RE: got a ? - 5/19/2008 12:35:22 AM

FoxGT

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I'd say your tapping is probably from the plugs arcing. check gap & inspect the plugs. If they're good inspect the plug wires.

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RE: got a ? - 5/20/2008 12:43:16 AM

PJC Racing

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quote:

ORIGINAL: AdderMk2

quote:

ORIGINAL: PJC Racing

Edit: My original statement was completely incorrect and I removed it to ensure that the information does not mislead anyone.

I would check with what Adder said, you may have a cracked plug. Start the car in a dark area and check to see if you have spark where it should not be.

I'm glad you caught that.... considering 94/95's had E7 heads.....

(cobras use 764's)

Yeah for some reason I was thinking GT-40 heads and them I removed my head head from rear after I posted.

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89 LX Coupe: Factory 5.0, common performance and suspension bolt-ons (306 build inprogress)
86 GT: (current 1/4 project) will have primarily Team Z suspension and chassis additions, 408 with nitrous in the works
2003 Mach 1: programer, exhaust, 4.10'

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Post #: 14