I have posted about my sulggish 4Rrunner which is a 3.0 Auto with 178K and I changed out the fuel filter last week but it didn't help the problem. One thing I am now noticing is that I don't have any pressure on the gas cap since I changed the filter.

I think I am closing in on my problem and now believe it is either a clogged injector or the fuel pump. I need to know if there is a simple way to check the fuel pump pressure.

Appreciate any help on that or isolating a bad injector.

Thanks,