Hope someone can help me find a solution that has been driving me nuts. About 2 years ago i seafoamed my previa thru the brake booster vac hose. Ever since then my Previa would have trouble starting. It would crank for about 5 seconds and then start up. Last month I replaced the fuel pump (gas milage is exponentially better), it starts right up more often sometimes, but other times when I go in somewhere and come out a half hour later it still cranks a lot then starts.

Did a tune up after the problem started, no change

Spark plugs are normal and getting spark

changed out fuel filter

tested iacv and ign coil, both are within ohm spec so theyre good

new fuel pressure regulator



going to test distributor and maf tomorrow

What do you think it may be? Please let me know. Thanks!