Can smell gas in the engine bay! Not coming from the visible injectors. . think it's from the injectors under the intake manifold? Anybody else run into this problem before?

 

I've noticing the same thing too on my 4runner. When I turn off the engine and get out sometimes i smell a fuel smell havent looked around but I really need to get on that lol.

 

It could be leaking o-rings on the injectors. Its' pretty easy to replace the o-rings and gaskets on the fuel rails-- after the plenum is removed. That's the hard part.

A couple of years ago I had a fuel odor problem on my '94 Camry that I traced to the VSV controlling the charcoal canister. The valve failed closed so the fuel vapors had no place to go and vented into the engine compartment. Replacing the VSV fixed the problem.

If you can not find any visible leaks then I'd check the evap system next.

You can pressurize the fuel injection system with the engine off by jumping the B+ and FP terminals of the check connector with the ignition switch in the "on" position. You should be able to see a fuel leak in the pressurized side if you have one. You can do this after removing the plenum if you use a piece of fuel hose and barbed hose connector to connect the fuel pressure regulator to the fuel return hose so it doesn't spray fuel everywhere.

 

Most common fuel leak spot on the veezy is the fuel pulsation damper, a little disk stuck on the back end of the passenger side fuel rail. It's dangerous because it drips fuel onto the crossover. Fires have started as a result.

They're pricey for their size. 1sttoyotaparts for a dealer part ($95, they call it a "Pulse dampner") or you can get a standard motor part for $88 from rockauto (called "fuel injection pressure damper").

 

I can tell you first hand that the rockauto damper made by Standard Motor is junk. the thread portion of the part is slighly wider than the OEM one thus it won't go into the fuel rail. We then tried a local parts store and this damper was made by a different manufacturer and we had the same problem. Thread part is too big.

So today, we ordered an OEM one from 1sttoyotaparts.com.

Hopefully this will fix the damn truck.

 

That's really good to know. Thanks for posting.

 

I've gone through this same thing, except I knew where it was coming from ( second injector back, drivers side ) I could def. see fuel though ( not visibly leaking, just wet where it WAS leaking )

I never did get around to fixing it though ( blew HG before I got around to it ) Guess it'll get fixed now!

 

Update:

I received the OEM fuel damper from 1st toyota parts. It comes with a screw at the back with a cover on it just like the original one but it fit like a glove. No issues at all with this and now the truck leaks no more. Although the screw is the weak point in this part I think I'll be good to go for another 10-15 years with this new OEM damper. By then I probably won't have the truck anymore.