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Shane4371
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« on: June 17, 2016, 07:48:08 PM » |
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I've got preignition from 1/4 to 3/4 throttle,only when hot,i've got uni pods delkivic is slipons,40 pilot jet 117.5 main jet,4 turns out on air fuel mixtue,91 octane in the tank,lifted needles one step high,help
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FJowners.com
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« on: June 17, 2016, 07:48:08 PM » |
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Mark Olson
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« Reply #1 on: June 17, 2016, 07:59:17 PM » |
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downshift.
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Mark O.
86 fj1200
sac ca.
" Get off your ass and Ride"
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Shane4371
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« Reply #2 on: June 17, 2016, 08:07:53 PM » |
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Did that!!
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Shane4371
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« Reply #3 on: June 17, 2016, 08:09:06 PM » |
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Did that!!
didn't help,turbo blue 106 octane stops it tho,91 to 9e octane doesn't help |
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Mark Olson
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« Reply #4 on: June 17, 2016, 08:11:29 PM » |
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is this a recent development? pinging in all gears when hot?
what rpm are you shifting at?
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Mark O.
86 fj1200
sac ca.
" Get off your ass and Ride"
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Shane4371
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« Reply #5 on: June 17, 2016, 08:16:38 PM » |
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Ok my ignition is stock,it's been a issue for some time,in 55th gear at 55 full throttle ping ,from
11st to 2nd full throttle ping,323rd gear at 35 mph full throttle pi,only when hot,not cold
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FJowners.com
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« Reply #5 on: June 17, 2016, 08:16:38 PM » |
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Mark Olson
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« Reply #6 on: June 17, 2016, 08:21:40 PM » |
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go one step colder on your spark plugs.
what sprocket and gear are you running?
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Mark O.
86 fj1200
sac ca.
" Get off your ass and Ride"
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Shane4371
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« Reply #7 on: June 17, 2016, 08:24:13 PM » |
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17/41 gears,i got nvm iradium plugs,could be the issue?
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Shane4371
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« Reply #8 on: June 17, 2016, 08:24:52 PM » |
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Ngk
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Mark Olson
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« Reply #9 on: June 17, 2016, 08:34:50 PM » |
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good gearing, go a step colder on the plugs and see if that does it.
if you are weighing in over 300 lbs with rider and gear that will have an effect when bike is hot.
I used to have the same problem when hot.
I run
155 air bleeds
42.5 pilots
118 mains up 1 from center on the needles.
.880 on the floats.
no pings anymore no matter how hot it gets.
also flushed out my oil cooler that was clogged with goop.
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Mark O.
86 fj1200
sac ca.
" Get off your ass and Ride"
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Pat Conlon
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« Reply #10 on: June 17, 2016, 09:33:24 PM » |
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Yep, read your plugs.
Valves adjusted? How's your (hot) compression numbers?
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Tips for new FJ owners: 1) Don't have an Owners Handbook? You need one: http://tinyurl.com/79fgk52) '84-'87 FJ owners: Safety wire your fuel petcock. Do it now: http://tinyurl.com/l982s8w3) Replace your oem rubber brake lines. They are long overdue. Do it now. 4) ATGATT: Skin Grafts SUCK |
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Shane4371
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« Reply #11 on: June 18, 2016, 03:53:49 AM » |
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Not close to 300lbs,I looked the ngk iradium plug and the oem ngk plug are the same heat range.I'll check valves again.
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a.graham52
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« Reply #12 on: June 18, 2016, 07:43:24 AM » |
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You haven't changed fuel quality have you?
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Shane4371
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« Reply #13 on: June 18, 2016, 08:28:22 AM » |
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Ok,fellas I'll put this thred to rest,i've discoverd my problem,previous owner did a magnetic pickup mod to it,advanced timing,i've retarded her,no more pinging,thanks all for the help,
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FJ_Hooligan
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« Reply #14 on: June 18, 2016, 07:44:02 PM » |
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Ok my ignition is stock,it's been a issue for some time,in 55th gear at 55 full throttle ping ,from
11st to 2nd full throttle ping,323rd gear at 35 mph full throttle pi,only when hot,not cold
Those are some really interesting numbers. :-) |
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DavidR.
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FJowners.com
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« Reply #14 on: June 18, 2016, 07:44:02 PM » |
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