02 Cruiser Won't start in hot weather/Altitude- THOUGHTS???

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S

Shanny

10 Year
Joined
Aug 25, 2012
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We live at 8000 feet. Crusier starts fine in the early AM and late night, but if it's hot out tends to strand us. Today we left our house at 10am- no problems... When car sat for 2 hours wouldn't start... Still stuck :(

The fuel pump is fine... mechanic replaced fuel sensor (?). We can go weeks with no issues and then have issues every day...

HELP......
 
Will it crank and not fire? Or not crank at all?

Need more info.. if cranking find out if its spark or fuel...that should help narrow it down...
 
So it won't start at all? Throwing any codes? How does it run when you get it started, any sputtering or rough idle?

How do you know the fuel pump is fine? Did you have it tested some how, was it replaced recently, or what? This is definitely a fueling issue, and based on the limited data I'd put my money on the pump. We need more info though.
 
It cranks but doesn't fire. We had it into the mechanic and he told us it's most likely a fuel issue, but not the pump (not sure how he knows that). Runs totally normal once it starts. Yesterday it started at about 8:00 pm once the weather cooled off... Starts and runs just fine this morning. No warning lights etc... It seems to happen mostly during mid day and if we let it sit 30+ minutes it usually will fire up. Past couple times we've had to let it sit a little longer... The only other issue is that it does smell of gas fumes when it starts up....
 
Does it ever fire after cranking long enough when having one of its fits?

Sounds like some form of vapor lock. I'm not completely sure if the UJZ100 uses a return line fuel system or returnless. I'm betting it's returnless which is more difficult to prime when vapor locked.

I'm thinking the fuel system has some form of a pinhole leak either to the engine (via injectors), atmosphere, or back in the tank that is allowing it to lose pressure easily after the car is shut down and vapor lock. You might also want to check your fuel lines, especially near the motor/manifolds, to see if everything is where they should be.
 
"Vapor lock" in the traditional definition is a carbureted illness but it does sound like a fuel delivery problem nonetheless. Maybe try venting the gas tank by removing/replacing fuel cap and/or temporarily disconnecting the evap canister?

Everything you ever wanted to know about function and testing of the two types of Toyota evap. systems is here: Motor.com from Jan-Nov 2006 issue PDFs.

You can diagnose yourself but need a pressure and vacuum gauge. You may be able to buy/rent/borrow from and auto parts store.
 
I had a similar issue with a totally different cruiser. However it may be related to your issues, to fix my issue I simply switched the hoses on the charcoal canister (inlet to outlet/outlet to inlet).

I believe my issue was caused by topping off the tank and fuel going down the vent lines causing creating a vapor lock.
 
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