Finished my head gasket and MAN that thing idles like a champ. I had previously adjusted the idle screw to get it to idle around 700 rpm '91 3vze. Cranked it up after the rebuild and it's idling around 2000 rpm, guess I fixed something

Anyways intensive flashlight observation looking for leaking hoses anything of that nature and I can tell that one of the fuel injectors has a bad O ring at the top (between injector and rail) and drips once every 2 seconds. The good news is it instantly vaporizes as soon as it touches the top of the block. The bad news is it's fuel regardless. Screw mpg, is this going to blow up? After all this work I'm REALLY not in the mood to lift the plenum again. Am I just being a lazy ass?

On another note if I DO pull the plenum are the fuel rails pressurized when the key is ON so I can check them this time around? I can't recreate the leak when I have the key just set to ON so either the leak is vibration sensitive or there's no pressure without the engine running.

 

Hey, it's fuel that leaking and very likely to get worse overtime.....the consequences...big orange flames. Fix it right with new O-rings and grommets on each injector.
On my 5vzfe I don't think the rails pressurized in the ON position....maybe I just did not leave it in the ON position long enough when re-doing the top end a few weeks ago..

 

ya I went through the FSM and there's 2 pins to jump in the diagnostic port to power the fuel pump while the key is on.... I did get new O rings with the rebuild but no dice I guess. SIGHHHH ok time to pull it ALL apart one more time then I swear to god I'm just buying a motor swap.

 

I missed that in the FSM on the pump - it would have been nice to know when I did mine. Did you put a bit of fuel on the O-ring before inserting as the FSM mentioned? My bet is one that O-ring just twisted a bit on insertion.

 

Ya I'm hoping twisted, yep made sure they were all slick and that the injectors rotated around freely after mounting the rail.