Fuel problems

[TURBO 6]

I'm not getting enough fuel to my injectors for some reason. I have Red's DP with 83's and stock fuel lines. I checked the fuel pressure under boost and it's going up, just like it should. My WB02 is showing 12.5's and the EGT's were in the 1750 range before i let off. I tried throwing more fuel in the FAST, but it didn't help. I don't understand why the FP is going up with the boost and I'm out of fuel. FWIW I have enough fuel for 127 mph, after that is when it leans out. Any ideas?

 

[azgn]

you positive both pumps are coming on?

that setup should supply plenty of fuel if working properly

for example, my injectors are at 65% duty cycle at 127 mph.....same 83's, ATR double, and the 02 is pulling fuel (11.5 a/f)

 

[TURBO 6]

both pumps are coming on. I know I should have plenty of fuel. That's why I'm baffled.

 

[strikeeagle]

Duty cycle?

 

[TURBO 6]

Over 100%, how 'bout that?

 

[azgn]

they may be coming on, but they ain't pumping.........or you have a clogged filter/line

think I would replace 'em

 

[TURBO 6]

Just changed the filter. I could hardly blow through it. I could easily blow through the new one. I think that was the problem.

 

[JeffW]

good call on the filter .

 

[topfuel]

Originally posted by azgn
they may be coming on, but they ain't pumping.........or you have a clogged filter/line

think I would replace 'em

Is there a spec for a volume test on the ATR twins?
I'm trying to solve an intermittent lean condition too and I'm
suspecting my pumps are getting tired.

 

[TURBO 6]

I'd like to know, too.