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redcoon

88 chev silverado jolts when i accelerate

redcoon
15 years ago

1988 chev silverado 1500 2wd ex-cab 350 V8

month ago: add cleaner (marvel mystery oil sold @ walmart)

the following 2 tanks of gas the truck jolts everytime i step on the gas lightly and mildly similar to jolt-jolt-jolt-jolt--jolt

when it jolts it loses power

the jolts sound like CHunK

if i slam on the gas it doesn't seem to jolt

replaced fuel filter - no improvement

shop said "magnetic pickup coil" replaced that no good

every time i fill up its better (either doesn't do it at all or does it with a more mild jolt) till the gas runs low (1/3 tank) then it does it roughly again

No Check engine light

any ideas???

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