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#1 |
Registered User
Join Date: Oct 2004
Location: Fort Collins, Colorado
Posts: 376
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No more Autolite plugs
I have had a strange stumble on my '87 for some time, and have been chasing it until this weekend. It would only occur at idle, after fully at temperature. No stumble when holding the brakes and pressing throttle.
I had installed Autolite platinums about 5k ago, and they looked good, so I continued to t/s. built a new set of wires, fully rebuilt the throttle body, and it still stumbled. Finally, this weekend, I installed a new set of NGK platinums this weekend. FIXED!
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'99 K1500 Tahoe, 2dr, barn doors - 350/ 4L60E, 3.73 '01 K2500HD Silverado Ext Cab - 496/ Allison, 4.10 |
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#2 |
Registered User
Join Date: Sep 2011
Location: Knoxville, Tn
Posts: 408
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Re: No more Autolite plugs
I always use regular NGK Copper plugs in my C5.
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#3 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,287
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Re: No more Autolite plugs
I only run delco in my gms motorcraft in the ford and champion in Chrysler
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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#4 |
At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,211
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Re: No more Autolite plugs
Bought a set of delco R43's for a rebuild. Fought a stumble for hours.
Backed it out of the shop at midnite and noticed a ton of spark escaping from the #1 plug. Replaced it. Fixed all my issues. Always figured the box had been dropped and cracked the porcelain
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" That didnt make it any newer " " Dont antique the equipment " |
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#5 |
Cruzzzn' Vet
Join Date: Jan 2005
Location: Porterville,Ca.
Posts: 1,918
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Re: No more Autolite plugs
Tried a set of Champion plugs on my 83 and it never ran right, went back to AC Delcos and she's been running great ever since, Champions never again
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#6 |
Registered User
Join Date: Jul 2012
Location: MA
Posts: 207
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Re: No more Autolite plugs
I've tried Autolites in both Fords and Chevys with poor performance in both. AC Delco and NGK have been the most consistant for me.
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2012 Chevy 2500HD, 6.0L, 6spd auto, 4x4, ECSB 1987 GMC V3500 Dump, 6.2L diesel, TH400 1983 GMC K2500 - awaiting its restoration and Cummins swap. |
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#7 |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: No more Autolite plugs
I run copper core plugs. You know the sparky kind. Either one seems to light my fire all the same. Except those e3 ****s. Those are designed to work on a hemi center plug chamber.
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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#8 |
Registered User
Join Date: Sep 2009
Location: Placentia, California
Posts: 567
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Re: No more Autolite plugs
Yeah for ignition problems that watching an engine run in the dark is the oldest good trouble-shooting tip in the book. And it stills works today.
For my trucks that have conventional ignition early HEI, or points I run the cheapest plugs I can buy at the time. And always go a range hotter on the ones that are turning themselves into a 2-cycle. |
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#9 |
Registered User
Join Date: Dec 2013
Location: Marietta, OK
Posts: 277
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Re: No more Autolite plugs
Can you explain? Is this to check for sparking out? (like when a wire is on the manifold) Not trying to sound dumb, its just something I haven't heard of yet
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#10 | |
At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,211
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Re: No more Autolite plugs
Quote:
Just look for abnormal spark around the wires, plugs etc Do it in pitch black if you can. Mine was an accident that I spotted it.
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" That didnt make it any newer " " Dont antique the equipment " |
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#11 | |
Registered User
Join Date: Sep 2009
Location: Placentia, California
Posts: 567
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Re: No more Autolite plugs
Quote:
Also in addition to letting the engine idle and looking for problems a quick rev or two might reveal spark jumping. |
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#12 | |
Registered User
Join Date: Dec 2013
Location: Marietta, OK
Posts: 277
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Re: No more Autolite plugs
Quote:
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#13 |
Registered User
![]() Join Date: Oct 2013
Location: Stockton, CA
Posts: 475
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Re: No more Autolite plugs
some may not like this but, with later crate motors in my trucks I have used BOSCH Platinum with real good results.
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#14 |
Registered User
Join Date: Feb 2013
Location: Cary, NC
Posts: 816
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Re: No more Autolite plugs
I've always had problems with autolites. Delcos run just fine for my '96 and '79.
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Austin 1996 Chevrolet K1500 Silverado ![]() 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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