Q jet Question

Dave Ribeiro · 09-10-2010, 08:53 PM

Mark,

Has the carb been apart for any reason, jets-etc ..?
Did you have a stumble/miss with 3 lbs of fuel pressure when you first started ? Sounds like maybe float or needle is sticking and fuel is bleeding by ? Is it clean driving around in pits & on starting line....? Maybe Danny will jump in if he is around ? Top of 1-2
shift usually points to flapper valve adjustment ? I would take carb
apart and check over really good, look for dirt or something in needle & jet area and make sure things haven't fall into bowls ...
Good Luck, keep us updated & talk to Vic Santos, he's very good with Q-jets.........

Mark Callanan · 09-10-2010, 09:07 PM

Quote:

Originally Posted by Dave Ribeiro

Mark,

Has the carb been apart for any reason, jets-etc ..?
Did you have a stumble/miss with 3 lbs of fuel pressure when you first started ? Sounds like maybe float or needle is sticking and fuel is bleeding by ? Is it clean driving around in pits & on starting line....? Maybe Danny will jump in if he is around ? Top of 1-2
shift usually points to flapper valve adjustment ? I would take carb
apart and check over really good, look for dirt or something in needle & jet area and make sure things haven't fall into bowls ...
Good Luck, keep us updated & talk to Vic Santos, he's very good with Q-jets.........

David

The car the 1st run ran fine but didnt run the number by a tenth
Thats why I checked the fuel pressure and it was at 3 pounds
So I turned it up
Running around the pits is fine the car starts up fine and runs fine

The carb has not been touched and has been perfect till now
I think it may be a bad pressure gauge

Thanks David for stepping in here to help it is kind of you

We had to turn it up alot to get it to 6 pounds and again there is alot of fuel smell
I will look for a gauge in the morning...

james schaechter · 09-10-2010, 08:32 PM

I remember in the manual with the magnafuel stuff I bought it reminds you to check the fuel pressure at an idle, not with the engine off. I also have heard several different people commment on how far off some of the fuel pressure gauges could be.

09-10-2010, 08:53 PM	#1
Dave Ribeiro VIP Member Join Date: Sep 2002 Location: Williamsburg, Va.---USA Posts: 1,827 Likes: 1,612 Liked 56 Times in 27 Posts	Re: Q jet Question Mark, Has the carb been apart for any reason, jets-etc ..? Did you have a stumble/miss with 3 lbs of fuel pressure when you first started ? Sounds like maybe float or needle is sticking and fuel is bleeding by ? Is it clean driving around in pits & on starting line....? Maybe Danny will jump in if he is around ? Top of 1-2 shift usually points to flapper valve adjustment ? I would take carb apart and check over really good, look for dirt or something in needle & jet area and make sure things haven't fall into bowls ... Good Luck, keep us updated & talk to Vic Santos, he's very good with Q-jets......... __________________ Dave Ribeiro 1033 STK

09-10-2010, 08:32 PM	#3
james schaechter VIP Member Join Date: Dec 2004 Location: Cumming GA Posts: 1,994 Likes: 1,299 Liked 1,440 Times in 301 Posts	Re: Q jet Question I remember in the manual with the magnafuel stuff I bought it reminds you to check the fuel pressure at an idle, not with the engine off. I also have heard several different people commment on how far off some of the fuel pressure gauges could be. __________________ James Schaechter 3163 STK

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