Well I have been working on an intermittent power loss/ engine miss for the last few weeks. What I was experiencing was a power loss when I got the truck up to speed and let off the gas a little. I would feel a loss of power then power would come right back.
Found the dist. cap in poor condition and appeared to have spider web cracks so I replaced the cap and rotor, plugs and plug wires. No change.
Next I replaced the fuel filter. The one that is near the fuel pump. No change.
So still thinking it is a fuel issue I put a whole can of Seafoam Fuel Treatment in.
Well as of right now she is running better.
Here is one thing I noticed. Lately, while running bad, when filling up the tank I noticed a big whoosh when I removed the fuel tank cap. Like the fuel tank was under pressure, not vacuum. I have added fuel twice since it has been running better and no whoosh when I remove the fuel tank cap.
Still not sure if it was the fuel cap malfunction or something like a fuel return line????
I do believe the Seafoam cleaned something out. Will run one more whole can per fill up to make sure things are cleaned out.
I just hope too much Seafoam doesn't hurt anything but my wallet.
1995 Suzuki Carry DD51B 4 speed, 4X4, Hi-Low transfer, Axle Lock, Diff Lock, Tilt Box