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Old 11-11-2014, 08:32 PM   #1
86c20
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Join Date: Mar 2012
Location: edgartown mass
Posts: 852
detonation problem

ok so my 86 with 350 is a pia. i have to replace the plugs every 6 months or about 5k. they will faul out then run like crap. i have run good plugs cheap plugs and e3 autolight. the e3 lasted about 15k then the detonation came back and one was missing the ground on it. joy joy. so new plugs and full tune up and 1000 miles and detonation agian. tonight i took the dizzy and turned it up and down gets better gets worse but still there and i cant turn it any more. also i checked all plugs still in one paece for now. there are no timing marks or pointer on the motor. have timed by ear by vacc and with a gm tech that put alot of them in have removed most of the emis stuff also. motor is all stock any help???
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1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph
1985 k30 "the ice cream truck from hell" no rust az truck
197-8??? c30 "ramp truck" 454
1978 monte carlo 350 350th with 2.73 gears. no rust. sc car
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