FJ drives well for 10 minutes or so but once it gets hot it loses considerable power/acceleration in all gears. Cleaned the carburetor and replaced fuel filter (already has new plugs) but that didn’t do it. Any ideas?
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Secondaries might be opening and staying open. Another issue can be the solenoid that shuts fuel off upon shut down.FJ drives well for 10 minutes or so but once it gets hot it loses considerable power/acceleration in all gears. Cleaned the carburetor and replaced fuel filter (already has new plugs) but that didn’t do it. Any ideas?
Is this suddenly new or has it been coming on slowly? When did it get it's last good tune up? What's the timing set at? What do you mean by "cleaned the carburetor"? Took it apart and soaked it or sprayed some cleaner down it?FJ drives well for 10 minutes or so but once it gets hot it loses considerable power/acceleration in all gears. Cleaned the carburetor and replaced fuel filter (already has new plugs) but that didn’t do it. Any ideas?
What’s the water temp when it stumbles and dies??? Sounds like a water pump or radiator issue…or even a stuck open exhaust flapper…,
It doesn’t die (although I usually just drive it home after) it just labors. It feels like driving with the parking brake on!What’s the water temp when it stumbles and dies??? Sounds like a water pump or radiator issue…or even a stuck open exhaust flapper…,
This came out of nowhere. My mechanic gave it a tuneup in the spring. Sorry, I don’t know my way around an engine. The shop where I take it is pretty good and one of the mechanics has a few FJ’s, but the guys in this forum have such great advice I thought I would post and pass along any ideas.Is this suddenly new or has it been coming on slowly? When did it get it's last good tune up? What's the timing set at? What do you mean by "cleaned the carburetor"? Took it apart and soaked it or sprayed some cleaner down it?
Smogged or not?
Thanks. This is what my mechanic just texted he is going to check on Monday. Appreciate the advice.Last time the valves were adjusted?
Hot valves may not be fully closing. This would definitely cause a drop in power. Unfortunately, with the high volatility of RFG, it’s also a very short run to a burned valve.![]()
There’s not an actual backfire, but there is a little popping out of the exhaust, there is some rattling under the hood.If the valves don’t fully close, there would be a ‘back fire’ associated, a popping under load. Could be fuel related as @charliemeyer007 suggests, but if it overheats you get into a fuel standoff….
With that said, what type of fuel, ethanol laced? And what is the ambient outside temperature? If so you could be suffering from a bit of vapor lock…..
Pictures would be nice…
Didn’t try that. Mechanic has it now. What would that tell me?If you pull the choke, does it seem to improve any?