Very Excessive Fuel Consumption

[JML]

Good day all,

Here is a little history. I have a Toyota 4x4, 22re engine, i hit a bump fairly hard one day and the engine quit. After looking under the hood a vacuum line from the air intake had come loose, replaced the line, the engine started but was very rough. After couple days the truck returned to normal operations. After about 2 weeks the symptoms are back, running really rough when warm, you can actually watch the gas gauge drop by a 1/4 tank in the span of 15 blocks.

A Toyota dealer near where I live (we are rural) says that putting the vehicle on computer will be a hit and miss situation and only works acurately about 40% of the time. The engine is not factory with high performance parts installed so it will generate many codes unrelated to the current problem. A huge expense if it does not generate the codes to help diagnose my problem.

Does anyone have any diagnostic tips to check for? I first thought a vacuum line had disconnected, checked the vacuum lines, plus I don't think that would resolve itself then return with the same symptoms after a couple weeks. I cannot see an O2 sensor on my exhaust manifold. So not sure if i have one.

Can anyone give any hints.

Thank you in advance

JML

[2004RAV4]

I'm guessing that the 22RE is carbureted, and based on what you've described it sounds like it's running extremely rich. If there's no O2 sensor then there's no OBD scan possible.

Check to make sure your choke is fully opened when it's warmed up. Also check fuel line pressure - if it's lower than spec, try changing your fuel filter and check it again. Always look for cheap and simple things first.