I started this morning w/ completely normal cold start and allowed to warm fully. No misfiring under any condition. No misfires except those from last evening on cylinders 3 & 4.

I scanned and found only anomaly to be slightly low STFT (~ -11%). LTFT was still at zero. This could be a relic of original flooding of #2, or maybe one or more FI's are leaking or slow closing.

For now I will drive and see what happens.

I plan to drive a bit, see where LFTT goes and if indicated perform a FI cleaning; remove and flush backwards and forwards. FI's are easy to access and replace if indicated.

thanks

 

Actually it's worse. Add in that the number 1 ingrediant of ethanol is water, and you have a potential problem. As the ethanol and gas mix sit, they do seperate, which can cause a bad tank of fuel. Granted the software that Honda (and every other manufacturer) uses, adjusts ignition timing to allow that crap to burn. Today's fuels are nothing like they were 5,10 or even 20 years ago (back when it was red instead of **** yellow).
You're probably right that his fuel isn't the problem, but there is a very slight chance that it could be (it's not very common anymore though). Most storage tanks at fuel stations aren't completely dry when they get topped off. Most of the crap at the bottom gets mixed into the new supply, and that's what gets pumped off first. That's a big reason for not getting fuel while the tanker is refilling the station.

 

There is always some water dissolved in gasoline (E10 or E0-100% gasoline).

The problem with filling up your car at a gas station while a tanker is refilling is the sediment (rust, scale, etc.) at the bottom gets agitated throughout the tank. If you fill your vehicle with gas while this is happening, the particulates can make it into your gas tank. If you wait, the particles will settle back to the bottom of the tank.

 

I drove about 10 mins this pm and all readiness monitors completed except Evap system. LTFT went to -5% and STFT now is -10 to -15%. I plan to clean FI's 1, 3, 4 if system stays at a total trim of -15 to -20%.

thanks

 

Well that's where we're going to have to disagree; for E0 (i.e. 100% gasoline with no ethanol), any water in the tank will pool in the bottom. If said water gets sucked up by the fuel pump, then it has a high likelihood of causing an operational issue with the engine. For E10 fuels, the alcohol holds any water in suspension and meters it harmlessly though the engine.

 

Ummm, no. See my response above.

 

Unless the water level saturate is higher than the alcohol level can absorb. I've seen a GM fuel filter clog from too much water in the fuel. It shut the vehicle right down too. Changed the fuel filter and added a can of B12 and it's been good to go since. Like I said before it doesn't always happen, but it can happen.

 

Yeah, I suppose if you put a garden hose in the fuel filler opening that would do it; I rather doubt normal condensation would ever get to that level unless the tank was left open to the elements for weeks or months on end.