Mass Gas Leaking Fron my Muffler / Exhaust - Toyota Nation Forum : Toyota Car and Truck Forums

hastings900 · 08-19-2011, 07:51 AM

Hello All,

After replacing the top end of my 3.0. (The motor was replaced before I bought it). I started it and it has a miss to it. I also noticed that there is a lot of gas filling the muffler and coming out of the exhaust pipe. It takes about 7 min to stop leaking and the is only running it for a bout 3 minutes. Cant figure it out. Its gotta be something stupid. maybe wrong hose I put on some where. I don't know.

1.compression about 175 in all 6.

2.timing is good at all 3 marks , zero degree mark and both timing gears on the right and left head. up at the notch. Distributor / Rotor is pointing at #1 plug wire on cap.

3.new injectors all 6, plus new injector plugs 6 of them, solder, heat shrink, liquid electrical taped and then wrapped harness in electrical tape both sides.

At this time I've spent alot of money on parts. I don't have the cash to take it to toyota. Im getting no help from toyota service people at this time. They said "they have no idea bring it in". But at 92.50 hours who can afford that. That's like 4 time what I make an hour.

Have you never seen a grown man cry. Well I send pictures after getting the bill from Toyota if that's what I gotta do. If you all cant help me figure this out.

Thanks All,

Gary

Tremaine · 08-20-2011, 01:34 AM

Have you checked the EGR? Spark plugs?

jetwhine · 08-20-2011, 11:10 AM

hastings900,

Have you checked the fuel return line to the tank to make sure that it is clear and free of obstructions? Maybe blow some compressed air through it? I'm thinking if the line is partially clogged then it might be giving you some issues. And maybe when the pressure builds up enough then it can get past it. This is just a thought.

Tremaine · 08-20-2011, 12:52 PM

Quote:

Originally Posted by hastings900

Hello All,

After replacing the top end of my 3.0. (The motor was replaced before I bought it). I started it and it has a miss to it. I also noticed that there is a lot of gas filling the muffler and coming out of the exhaust pipe. It takes about 7 min to stop leaking and the is only running it for a bout 3 minutes. Cant figure it out. Its gotta be something stupid. maybe wrong hose I put on some where. I don't know.

Gary

Just to remove the potentially obvious, are you sure it's gas and not water vapour condensing in the muffler? If it turns out to be water, you'd just need to pick up something like STP water eliminator and pour it into the gas tank.

sam333 · 08-20-2011, 06:42 PM

You must have large fuel leak to have it coming out your exhaust, never have seen that before. The cat, even right after start up should burn up/ evaporate any raw fuel. Are you sure its fuel? Check your cold start injector and timer , fuel pressure regulator. Pull plugs and examine to see which cylinders are missing. If they are all fouled suspect cold start injector, fuel pressure. If only one is fouled suspect bad injector , bad spark on that cylinder.

hastings900 · 08-21-2011, 01:29 PM

I'm thinking fuel regulator or an open fuel injector. I don't have the tools to check them. Tremaine Im not sure about the egr or spark plugs. Could you go into that a little bit more. Im not sure what the egr and spark plugs have to do with mass gas rolling down the exhaust. and yes it is gas not water. after putting the truck up on the trailer and moving it . I put a lighter to the puddle it ignited. jetwhine yeah I don't know but Im thinking that its fine because I didn't have that problem before i rebuilt the top end and replaced all the injectors. sam333 that a thought i for got about he cold start injector. number 6 didn't even look like it was firing. Im going to take it to toyota and have them look at it. I'll let you all know what they find.

Thanks

hastings900 · 08-25-2011, 07:51 PM

Hello all,

I just got the word from toyota. The reason for the mass gas going down the exhaust is that the valves are sticking open. #4 #5 #6. they state low compression in them cylinder like 58. So my question is how do I get them from unsticking.

The heads were just rebuild. Is there an adjustment for the valves?? Before I took my 4runner to toyota and before I started the engine for the first time. I did a compression check. with all spark plugs out. It said 175 avg between all six.

So how come they are now sticking. How do I get them from unsticking.

Thanks

ZAchole · 08-25-2011, 08:52 PM

Yes, after rebuilding the heads, you would need to adjust the valve clearance. I'm thinking your valves may not be sticking, just not seating properly. Therefore, low compression.

hastings900 · 08-26-2011, 06:15 AM

Can anyone please explain the adjustment for the valves on a 3.0 3vze motor. In the book it doesn't go into details. It just says it should be done at the dealer and it requires special tools. My other question is can they be adjusted from the top of the head without having to take the head off. If I can adjust them while they are installed on the motor where do I get the shims and how will i know I have the right ones.

Thanks

ZAchole · 08-26-2011, 10:18 PM

You need to find a factory svc. manual. It has the procedures and specs in. A micrometer, feeler gauges, and a torque wrench should be the only special tools necessary. The shims are available at the dealership, and maybe elsewhere, I haven't looked. You can adjust them on the truck, but you'll have to remove the timing belt. Without the Toyota tools, the cams need to come off to swap shims. Just pay attention, and don't strip your cam cap bolt holes.

hastings900 · 08-27-2011, 11:08 AM

I have another question that has been bothering me in regards to the valves. If I did a compression check prior and each cylinder showed an avg of 175 lbs per.Toyota did a compression test and they found that Cylinder 4, 5 and 6 have low compression about 56 lbs in all three cylinders. why all of the sudden would the valves be sticking. Something doesn't make sense. Its just not adding up to me. Toyota gets a rich code. To me it sounds like the spark plug are not firing and the fuel is just being dumped down the cylinder without being ignited and running down the exhaust. to me that makes more sense. Like I said I am getting a lot of raw gas coming out of my muffler and exhaust pipe from it collecting. maybe some could explain it to me barney style.
Thanks
Gary

sam333 · 09-12-2011, 11:11 AM

Sticking valves and tight valves ( adjusted to tight/wrong shims) are two different things, but with the same result, low or no compression on those cylinders and with no compression( even with spark and fuel) the cylinder won't fire. Sticking valves are unusual , but on a new engine, if valve guide work was done the fit of the valve stems in the guides could be to tight. The problem could be intermittent . Like what was said before , check you valve clearances first and turn the engine over by hand and look for any sticking valves. If you find any, then you need to remove the head and take it back to where the work was done.