New truck, ran rough, check engine light illuminated….

Sketch

 

What?

 

I run 100% pure gasoline...0 Ethanol.

In my area I pay $3.65 to $3.99 per gallon...


Well worth it imo.

 

I run 87 octane and better all the time. Never 85 octane. That crap will hardly burn anyway. I have found 88 octane without ethanal in Utah. This runs good and get excellent mileage. Has occured once so far. But, after the previous Nissan Titan junk I am a bit hesitant due to so many problems.
Ya’ know, I want my old 2001 F250 with the 7.3L diesel back. Old dirty diesel with gobs of power and put 267,000 miles on it. No problems. Can’t turn back the hands of time tho’. MTG

 

I run Shell 93 octane. I know nothing about knock sensors/timing advance but I have 0 issues with acceleration and gear hunting and transmission shutter. I have no hills and do the speed limit so my gas mileage is a lot better than most.

 

"Bad gas" isn't as common as people in here seem to think it is

 

I’ve seen it once in nearly 20 years in the business. I’m really surprised no one has told him to check the gas cap yet.

 

I figured this

Not everything new is bad, just relax, it hasn't come back.

 

2023 with 8,000 miles, check engine light. Last thing you want to do is have the dealer look at it since it is certainly under warranty and the dealer would have the latest information and tools to check on it. Way better to let us psychopaths diagnose your trucks problem. LOL, anyways it's probably nothing to worry about and you are saying it is running rough, it that while idling because it may be the cleaning cycle. If you don't know about the cleaning cycle then it can make you think the engine is about explode.

 

Yes, I did not know there was a cleaning cycle. But, if this has occurred I can understand the rough idle. Albeit, not the CEL. MTG

 

absolutely this. but also, IT'S A NEW TRUCK. half the reason to buy new is the warranty. otherwise there's much better deals to be had on older trucks.

only tw can make a minor inconvenience of a blip of a problem into a 2 page issue speculating that the entire truck is a lemon...

 

Timing trumps ethanol content. Within reason. In other words, if you are able to advance the timing and gain power, this also equals efficiency and for highway mileage is a nice improvement. It also helps the truck stay in 6th gear vs downshifting. This MPG was achieved on my OTT tuned truck running 30% E85 / 96 octane! This was 95% highway around 65 MPH. I don’t wanna get off track too much as I know this has nothing to do with the original post, but I think there’s a lot of misconception with ethanol.

 

Did you pull those codes it threw yet?

My guess is it could be intake plenum.

 

Crazy. It shouldn’t idle rough.

I stopped at a light yesterday and for a second there thought that my engine shut off. That’s how smooth she idles.

 

Not surprising at all if driving 65 mph. If I remember correctly your truck is pretty much stock?

I easily could do that when my truck was stock, well except for 265/65/17 E load ko2s. Only when warm out though.

 

The only time my truck saw ethanol is when the dealer filled it up with 87.

Ever since then I was using 91E0 shell for about 2 years, then I switched to 94e0 chevron due to SFOB tune. Truck drives amazing.

 

You have had time to find an auto parts store. Have you pulled the codes yet? If not it really must not be a big deal to you if it’s not worth the time to figure it out. Keep running a rough truck. If it shits the bed don’t start another post bitching that your truck died.

 

not exactly stock, 1.5” lift, 32’s, 100 lbs of skid plates.

 

Was looking at my left side engine mount and noticed it has a big gap and isn’t seated correctly. I went to the dealer to look at used trucks and all of them on the lot didn’t have this big gap like mine. Most had no gap at all just one had a gap but yet was still smaller then mine. It appears the two parts of the motor mount aren’t meshing together

 

we should all know that:

1. 98% of Toyota mechanics are the same kids that couldn’t stay in the coloring lines in kindergarten. And now they attempt to change your oil….
2. If the dealer cannot replicate the problem, they won’t do squat for you. Codes or not.