84 300D rough idle. Have done everything. Need help.

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84 300D rough idle. Have done everything. Need help.

05-15-2021, 12:08 AM

Alec300SD

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Join Date: Nov 2013

Location: San Mateo, CA

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Could just be air insursion on the suction side of the lift pump.
Check that the fuel hoses are tight and can not be rotated.

Possibly worn out pressure relief valve, primer pump, and/or worn out fuel lift pump?
Springs can get fatigued over time, also the o-ring for the lift pump shaft may need to be replaced just due to age.

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