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Sep 27, 2011 | 04:56 PM

copperjohnc

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Spark Plug Gap

Question for the resident Guru's,
I bought a set of Bosch Platinum Plus spark plugs for my "92" F150 5.0.
according to Bosch the gap should be .054-.060 although the service manual calls for .044,I'm thinking the Bosch gap is a general blanket gap given for any vehicle that utilizes that particular plug.
do I go with the factory gap or Bosch?

thanks in advance

Sep 27, 2011 | 05:01 PM

bashby

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From: Charles Town, W bygod Va

Take those bosch plugs back and get some motorcraft or autolites. Buy beer with the change.

Sep 27, 2011 | 05:01 PM

86F150302

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From: Jacksonville FL

What you do is take those back and get Motorcraft copper plugs

EDIT: Posted at same time.. But you beat me to it.. Reps to you.

Sep 27, 2011 | 05:03 PM

Slip ford man

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From: Calverton

Yep, really not worth the expense at all...get the copper Fords gap at .44

Sep 27, 2011 | 05:07 PM

bashby

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From: Charles Town, W bygod Va

Quote:

Originally Posted by 86F150302

What you do is take those back and get Motorcraft copper plugs

I was wondering how long it would take for someone else to say that... That was quick! Over the years of working on autos proffessionally, I cant tell you how many driveability problems I fixed and saw get fixed by taking out Bosch or the latest 4 electrode miracle spark plug. You'd think if it made a spark it would Bosch in VW's, BMW's... are fine but not in an american vehicle.

Sep 27, 2011 | 06:09 PM

jroehl

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From: Lafayette, IN

Quote:

Originally Posted by Slip ford man

Yep, really not worth the expense at all...get the copper Fords gap at .44

I agree with most of this, except I would gap them at 0.044". I think they would work a little better...

Jason

Sep 27, 2011 | 07:10 PM

octaneforce

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From: long island

side gap those babys!

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Sep 28, 2011 | 12:31 AM

Encho

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From: Caracas, Venezuela

If you do a full tune up (sixlitre), you could gap them at 0.055 with no issues at all.

Sep 28, 2011 | 04:10 PM

#10

octaneforce

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From: long island

Quote:

Originally Posted by copperjohnc

side gap? new term to me...

Performance Unlimited 4-Wheel & Off Road Center - Hartford, Wisconsin - USA Technical Documents

basically, it makes it so the spark is more direct, thus more power.

Sep 28, 2011 | 09:21 PM

#11

copperjohnc

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thanks for the responses guy's,I tried the autolites at .044 and there was a deff. loss of power,the tag on the bottom of the hood calls for a .054-.056 gap,I knoe it contradicts my reapir manual and what others here have said to gap 'em at.... WTF?