Shadetreemechanic
Full Access Member
I am doubting the air intrusion idea.
The OP says the filter light comes on. That light comes on when there is negative pressure in the fuel filter housing, meaning the injection pump is pulling more than the lift pump is pumping.
I can't see air intrusion causing that.
Thewespaul inline filter idea is a good one, in the rubber line near the lift pump is an easy spot. If that stays clear I would just replace the lift pump.
I have had a couple lift pumps go out over the years, some times its sudden,and other times it comes and goes like this.
The OP says the filter light comes on. That light comes on when there is negative pressure in the fuel filter housing, meaning the injection pump is pulling more than the lift pump is pumping.
I can't see air intrusion causing that.
Thewespaul inline filter idea is a good one, in the rubber line near the lift pump is an easy spot. If that stays clear I would just replace the lift pump.
I have had a couple lift pumps go out over the years, some times its sudden,and other times it comes and goes like this.