| Note how full tank is when VAPOR LOCK starts to occur. When it occurs again STOP go around and pop the gas cap take note how aggressive the vaccum on the fuel tank is. After releasing this VAPOR LOCK start motor and note preformance difference. If there is a difference then your AIR SWITCHING VAlVE is dead $600 bucks for the part. Cheap fix is to buy a 2nd gas cap- drill a small hole in it and save the original for inspection time.
How do I know? Same problem, new fuel pump, air rale, exhaust, egr, carb, manifold work, new distributor---BUCKED LIKE a horse on the way out of the dealers shop. I drilled a hole in gas cap and it has never done it again. Hope this helps.
P.S clogged fuel filter usually results in a loss of power but the motor idles well and takes off at low speed OK but when more gas is required to speed up the choked motor just kind of slows down whether you floor the pedal or not. That is my experience with a clogged fj60 fuel filter. |