Random missing, condensation in tank ?

I have already had my roll-over valves & related gas tank rubber replaced (and upgraded w/Fabio’s pump surrounds). Fuel filters replaced more recently along with all spark plugs and ignition wires. Bullet proof right ?!

Rained a TON in LA recently, as folks may have heard. Anyway, my car stayed outside the whole time 24/7 for the 3 days of rain with 1/3 tank or so. A random miss has since appeared and related CEL (after driving 3-4 miles post the storm). Filled up the tank, it ran perfect amd the CEL completely disappeared but just came back…AWESOME !

I hope it goes away. I need somebody to tell me it will go away.

My mechanic says he has already heard from 3 people local with the exact same issue. Just filled up the tank, still missing but this seems to be another Ferrari “wrinkle”. Condensation in the tank. Great.

“Ferrari, where sometimes the wheels will actually leak air.”

 

It will be ok. It will be ok. It will be ok…I hope.

If it is condensation I am thrilled. I will cover it in the rain
Funny I just posted a poll about keeping your car outside 24/7.

The universe talking to me I hope.

 

I was hoping you might check in on this Rifledriver.

Dumb OEM Parts & Service guy over here, you know the type.

 

I asked about that exactly and was informed that it COULD have a detrimental effect on hoses and related components. I did use Seafoam on my Ducati.

 

Is that the recommended brand ?

Anyone try it ?

 

No issue when starting and driving when started cold this morning. I parked it, ran some errands and when I started it back up (hot obviously) it was back to running rough/missing. Seems that when I start it or drive it hot, it exhibits the issue. Does that box with condensation ? Maybe once it is in “closed loop” mode all bets are off.
Same thing happened yesterday.

I am about to order a pump and purge the gas…recommendations ?

 

Thanks a ton, I love your various content over the years here. Especially those extensive Major Service Pics, etc…

Thank you again.

 

Update. Finally burned up all the bad gas running up and down PCH, filled up with Shell today, drove a few miles. Restarted it and the CEL went off and the car runs like a raped ape again.

Bad gas.

Now I will be one of those old men advising the youths to not fill up “after it rains” here in CA because you can “get bad gas !” Sounds like an old Dads tale or something hahaha. As an aside, we are stuck with 91 here now but my mechanic told me he used to be able to get 93 octane at the airport once upon a time here in LA. !

 

Good thinking, I just found a VP Racing Fuels less than 2 miles away on Hollywood and Highland and will head there tomorrow - for sure.

How many gallons do you suggest I add to a (nearly) full tank ?

*edit* so fuel is linear so (101+91)/2= 96 octane. So the ratio should be close to 5 to 1 to achieve 92.6 octane.

30 gallon tank = Add 5 gallons to and almost full tank.

 

Added 101 and filled the balance of the tank with 91 (5:1). CEL even disappeared on the way home. No issues whatsoever when I start it cold, even after driving for 100 miles in all types of traffic.

As soon as I shut it off and restart it…..BANG same rough running and missing every time and CEL. Does not sound like bad gas anymore. Maybe an 02 sensor but they are all new and should work in closed loop.

Issue still persists yet only when it starts hot.

Throwing the flag and scheduled an appointment at Fast Cars. Dammit.

 

I did, I actually found another semi-local spot in LA. I added the 101 last week, hoping it would help. It was $14 per gallon. Still misses — only when I start it hot.

 

Had all the plugs replaced, checked vacuum, replaced the 4 check valves and just recently did all new plug wires too. Turned out to be two injectors that worked fine when cold and when bench tested but on the car (when hot) were failing. Found one OEM $900 and one rebuilt ($450). Problem solved.

MSW should figure out an injector solution, it is confusing as all hell to find the right ones and OEM is $$$$