sts2usnss

I have a 90 runner with the 3VZE. Driving home from work today I kept smelling gas. When I got home I walked all around it and could see no signs of a leak, however when I popped the hood you could tell it was coming from under there. I looked all over that engine and could not find any sigh of a leak. The smell does seem to be stronger on the passenger side though. I did the search on here and found some similar issues but they seemed to have obvious signs of a leak (actual gas dripping). Any ideas where to start looking?

olharleyman

I just had to do injector seals for the same reason could not see it but smelled it realbad even brought my eyes to watering. Changed all the seals in the injectors no more gas smell and running better.

904_runner

There is a fuel pulsation dampner on the end of the fuel rail underneath the intake plenum on the passenger side. Idk about yours but there is a little screw under the cap and it fell out of mine and caused it to catch on fire. Might want to check that.

sts2usnss

Is there anyway to check the injector seals without removing them?

sts2usnss

anyone?

88runnertx

I've heard about leaky fuel dampners being the cause for such a smell.

I'm having the same issue with my '88 3vze and I believe it is either the dampner--I'm not a mechanic, anybody got a pic or diagram or where the dampner is--or the fuel injectors are not installed correctly or are leaking.

I'm curious to know what is involved with fixing injectors seals too, or the dampner possibility.

Waiting for yota gurus/yodas to reply.

904_runner

right around here for that fuel pulsation dampner



Need anything else just ask.

mike92runnerSR5

x3 on the pulsation dampner...had same smell...that was the cause..

904_runner

Oh to answer your question, it depends on what is wrong. No clue about the injectors, but for the dampener, the only two things i can think of is that it might be leaking from around the rim, or the screw fell out. If its the lip you will have to buy a new one. I personally just put red locktight on the screw and put it back in cause that was the problem with mine. Either way, it looks like you are pulling off the plenum and looking around.

Make sure you take care of it before it catches on fire, you don't want this happening!



GOod luck!

abecedarian

maybe also make sure the hoses to the charcoal canister are in place and good condition.

sts2usnss

Thanks guys. That definately gives me a place to start checking.

Alex 400

mine was also fuel dampner. i got away with it. i was close to having a fire. check it with an inspection mirror. find it with the mirror and then if you can have someone start it and then turn it off and you should be able to see it coming out of the cap. thats what happened to mine. good luck and be safe.

p.s. if you need a new one, get a toyota one, don't get an off brand. I tried that but the only one they had was a hack job and had crappy threads. good luck.

904_runner

Maybe there should be a recall since this seems common!

Alex 400

you would think so, wouldn't you?

especially something that can cause a fuel fire. mine was dripping on my crossover exhaust pipe. so i could see smoke. that's how close mine was......to

904_runner

See my above pics! Thats what caused that so You got lucky!

It was soo depressing for me, 16yrs old, first vehicle, catches on fire on the way home before i even got to drive it .

Luckly, my grandfather was a mechanic so we ended up fixing it in the driveway with the help from the family! Only good outcome is i know a bit about the engine now!

Now its just a braging thing! "250,000 miles, 3.slow, original headgaskets, been through a fire, you know its a toyota thing, lets see your "insert brand of vehicle here" do that!"

Gavy

I don't know about the 3vze but just last week on my 22RE I had to replace the fuel sending unit located on top of the fuel tank because of a leak however I noticed the gas smell 3-4 days straight before the leak opened up enough to actually let the fuel drip on the ground try and see if the smell is stronger back near the gas tank area

sts2usnss

Can't smell a thing towards the back of the truck. It is definitely coming from under the hood. The smell is strongest on the passenger side.

Again, thanks for all the tips guys. Hopefully I can find this thing soon. I bought a fire extinguisher yesterday...just in case!

Alex 400

yeah that is the side the fuel dampner is on too. i bet that's it. yeah have that fire extinguisher ready.

sts2usnss

From what I can tell this is where it is coming from. Plan is to clean it all up today and let it run for a while and see for sure. But when I run my finger across it, there is more gas than oil. Anybody know what this is? It looks like it's just a fitting?

sts2usnss

Woohoo! Gunk degreaser was on sale for $1.67 a can! So I stocked up. Now I have everything nice and shiny under the hood. Once it dries I'll go out and crank it and let it run for a while and see if I can actually find this leak.

Again, any help with letting me know what the above pic is would be great. I think it's just a fitting but then I'm an electronics guy. Under no circumstance do I consider myself mechanically inclined..lol.