Chris M 2
Active Member
I sure hope (as I'm sure many here do too... ) that this is my last message on the stalling troubles my ST has had.
After replacing several parts, doing nearly all the cleanings and treatments, and going a month with no troubles, stalling began anew a couple of days ago after a fill up. The last four times this has happened, it occurred a few hours or the morning after a fill-up.
I immediately took the truck to my mechanic. After a lengthy discussion, we believe the stalling was related to my rounding up to the next dollar and/or topping off the gas tank. So it appears I was my own worst enemy in this situation. :wacko:
My mechanic explained it thus: When you top off the tank or round up to the next dollar, the extra fuel has nowhere to go except into the vent line and the fuel vapor canister. Thus, airflow to the fuel in the tank is blocked or partially blocked. Imagine opening a can of grape juice and only punching one side of the can. The liquid can come out, but does not flow well because you've not punched a vent hole in the other side. The engine is fuel-starved because the fuel isn't flowing properly. Besides this, you run the risk of damaging/bursting the fuel vapor canister, which lets that material into the fuel system.
This problem didn't occur in older vehicles (like my '92 S-10) due to the design of the fuel system. That's why you could top those vehicles off with little or no problem.
Anyway, my mechanic advised me to NEVER top off or round up, and to keep an eye on the situation. After all the measures we've both taken, we're fairly confident this is the cause. I sure hope that's all it is. In the last two days, the problem has stopped since I've been driving and the fuel level has gone down.
Anyway, I went ahead and put on the Zabteck TB. It's nice. I got a little bit of extra pickup, which I like! Thanks Todd! I'm also doing Dingo's "Touch-the-terminals-together-and-drive-it-like-you-stole-it" Adaptive Learning Program. :lol: Thanks Dingo!
After replacing several parts, doing nearly all the cleanings and treatments, and going a month with no troubles, stalling began anew a couple of days ago after a fill up. The last four times this has happened, it occurred a few hours or the morning after a fill-up.
I immediately took the truck to my mechanic. After a lengthy discussion, we believe the stalling was related to my rounding up to the next dollar and/or topping off the gas tank. So it appears I was my own worst enemy in this situation. :wacko:
My mechanic explained it thus: When you top off the tank or round up to the next dollar, the extra fuel has nowhere to go except into the vent line and the fuel vapor canister. Thus, airflow to the fuel in the tank is blocked or partially blocked. Imagine opening a can of grape juice and only punching one side of the can. The liquid can come out, but does not flow well because you've not punched a vent hole in the other side. The engine is fuel-starved because the fuel isn't flowing properly. Besides this, you run the risk of damaging/bursting the fuel vapor canister, which lets that material into the fuel system.
This problem didn't occur in older vehicles (like my '92 S-10) due to the design of the fuel system. That's why you could top those vehicles off with little or no problem.
Anyway, my mechanic advised me to NEVER top off or round up, and to keep an eye on the situation. After all the measures we've both taken, we're fairly confident this is the cause. I sure hope that's all it is. In the last two days, the problem has stopped since I've been driving and the fuel level has gone down.
Anyway, I went ahead and put on the Zabteck TB. It's nice. I got a little bit of extra pickup, which I like! Thanks Todd! I'm also doing Dingo's "Touch-the-terminals-together-and-drive-it-like-you-stole-it" Adaptive Learning Program. :lol: Thanks Dingo!