[spyglass]

07 FJ with 17k, no issues till now. Car started yesterday and starting running VERY rough.........almost stumbling.....I guess that it was at 1/2 power and would not accellerate much at all.........

Pulled over, started again and the check enging light was on, along with all VSC, TRAC, etc. lights.

Called AAA, towed it to Toyota and they basically rebooted the computer, (must be running windows). After clearing the codes which had a CYLINDER 1 MISFIRE in its memory, the car ran fine for an extended test drive.

Any thoughts on the matter?

 

[kokopelli]

Those dang Windows updates.. LOL... Ron

07 FJ with 17k, no issues till now. Car started yesterday and starting running VERY rough.........almost stumbling.....I guess that it was at 1/2 power and would not accellerate much at all.........

Pulled over, started again and the check enging light was on, along with all VSC, TRAC, etc. lights.

Called AAA, towed it to Toyota and they basically rebooted the computer, (must be running windows). After clearing the codes which had a CYLINDER 1 MISFIRE in its memory, the car ran fine for an extended test drive.

Any thoughts on the matter?

 

[tazman]

Had mine do that at about 500 miles. Dealer said 1 and 3 cylinders had fouled plugs. Could have been bad gas I filled with? Everything fine since then.

 

[breauxtus]

Had similar symptoms and the driver's side forwardmost cat was toast. They think an electronic module was causing the condition that ultimately led to the failure of the cat. Replaced both the module and the cat and all has been well since.

The fault code is new to me though. Haven't heard that one but I didn't look at it when the mechanic was doing the work either.

 

[FJ Gooch]

could have been taht 10% ethenol in the fuel now a days

 

[spyglass]

I have figured it was a gas issue but I do tend to use good grade, albeit often NOT high test....................the ethanol mix,,,,,,,,,,,hmm. I have tried to avoid it but.............very interesting.

 

[DEWFPO]

E10 has been the standard in some parts of the country for almost 25 years now. It's not the 10% ethanol in your gasoline.

DEWPFO

 

[ActionJackson]

sounds to me like a ground issue. the computer systems in the cars today can be very sensitive. I have seen all kinds of wierd things happen due to a loose or bad ground

 

[jayman]

Did the dealership actually check on the condition of the plugs. At +16,000 miles, I'd go ahead and change them anyway

 

[1 Bored Clerk]

I've had issues with bad gas (76 gas only) causing stumbling and stalling in both a Jeep Grand Cherokee and a Toyota Prius. I'm not saying that's your deal but gas quality can be a problem. It was so apparent that the problems came from their gas (at several different stations) that I don't go to them at all. Weird.

 

[jayman]

I had a 2000 GMC Sierra that I used as a work truck while on a government contract. Had a fill of bad gas from a hole-in-the-wall place, which caused a misfire. The only way to eventually get it to run right was for me to change all the plugs

On the Prius, especially the 2004-2005, it's important to pull the coil packs out to inspect them. That year Prius had a problem with the hood seal, if parked outside rainwater could get into the coil tubes and cause a pretty bad misfire.

It's fairly easy to inspect the Prius coil packs and spark plugs once you unbolt and swing aside the relay box above them. Some Prius owners will pull the coils and use compressed air to dry out the tubes after they wash their engine bay, just to prevent coil problems