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6.9 will not rev or idle right until return line is plugged
Howdy fellas, I have my Dad's 1986 Ford F-250HD XL 2WD 6.9L/C-6. It has pretty bad air intrusion (Surges idle, dies, won't rev) until I hook another line to the return output and put my thumb over it and put pressure on the system. I replaced the line that goes from the lift pump to the frame...- pcwizzy16
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- Forum: 6.9L IH & 7.3L IDI Diesels
