full power stumble

[mgbrv8]

In first when I have the power key on at around 5000rpm I have a stumble. Now in second I dont have a stumble at all. Now the gas is over a year old but I did add two cans of octane boost so I am going to run it out first and put fresh in to see if I have a fuel issue. I just replaced the pumps and I hope that isn't the issue cause man that was hard to get back in. I also checked the pumps and checked the check valves.

Dave

[Ccmano]

Does it happen with the power key off?
H

[JThomas]

FWIW, Last year I had the fuel pumps replaced in my car. During the intial drive home from the repair facility, I had a similar stumble when I tried to accelerate past traffic or overtake a vehicle. Once I got the car home and refueled the car, the problem never repeated. I don't know if it was because of pressure in the tank or what but it never ocurred again.

[mgbrv8]

Okay when I changed the pumps it showed a half of a tank. Now I have driven it with the new pumps about twenty miles, now this morning it was acting a little worst. I wanted to run more of the bad gas out but i went to put some fresh in. I put 10 gal in and it registered a quarter shy of full. I didnt want to fill it up just in case I have to pull the pump again. It ran perfectly afterwards. Now was it the bad gas or the fuel level. I hope I didnt bend the float when I put the pumps in. If I did how do I reset it??

Dave

[gbrtng]

bad/old gas - damned E10 stuff has no shelf life - say 6 months or less. My 91 was bogging badly after a heat soak restart and with some fresh fuel today it's back to normal.

[Gunny]

damned E10 stuff http://www.zrwon.com/bookworthy.gif

George

[FU]

Good read on the subject of E10.
http://www.fuel-testers.com/expiration_of_ethanol_gas.html

[gbrtng]

Good read on the subject of E10.
http://www.fuel-testers.com/expiration_of_ethanol_gas.html

Well, isn't that special - maximum shelf life of 3 months. Just my luck the tank life is 3 weeks ...

And I heard that more corn is used for ethanol than food now. I used to be a midwest farmer so I can empathize with them, but federal subsidies to brew ethanol ... what will they think of next, subsidies to grow nothing?
Oh, never mind, I just remembered "Kennedy hay" from the early 1960s;
farmers paid to grow acres and acres of weeds on fallow land.

end of rant and, yes :proud: