Fuel System Help....
Thread Starter
Teching In
Joined: Dec 2013
Posts: 3
Likes: 0
Fuel System Help.... I have an 99-06 turbo silverado...
My fuel system consisted of 90# injectors, a walbro 450 & a walbro 255...
After 14 psi duty cycle started going high, so i upgraded to 127# injectors... Duty cycle went down but it's still high (112 to be exact) afr also jumps to 13s...
I want a better fuel system... Yet, i dont want to add nothing that will overheat, since this is my dd..
Thanks for any help
Btw, I'm running E85
My fuel system consisted of 90# injectors, a walbro 450 & a walbro 255...
After 14 psi duty cycle started going high, so i upgraded to 127# injectors... Duty cycle went down but it's still high (112 to be exact) afr also jumps to 13s...
I want a better fuel system... Yet, i dont want to add nothing that will overheat, since this is my dd..
Thanks for any help
Btw, I'm running E85
So from the gitgo, with E85 you're needing 30% more fuel volume than the gasoline equivalent.
What are your;
What are your;
- Fuel filter(s)?
- fuel line/return diameters?
- Fuel pressures at WOT?
- Configuration of fuel plumbing? (ie: Deadhead or return)
- Fuel pressure regulator
I have an 99-06 turbo silverado...
My fuel system consisted of 90# injectors, a walbro 450 & a walbro 255...
After 14 psi duty cycle started going high, so i upgraded to 127# injectors... Duty cycle went down but it's still high (112 to be exact) afr also jumps to 13s...
I want a better fuel system... Yet, i dont want to add nothing that will overheat, since this is my dd..
Thanks for any help
Btw, I'm running E85
My fuel system consisted of 90# injectors, a walbro 450 & a walbro 255...
After 14 psi duty cycle started going high, so i upgraded to 127# injectors... Duty cycle went down but it's still high (112 to be exact) afr also jumps to 13s...
I want a better fuel system... Yet, i dont want to add nothing that will overheat, since this is my dd..
Thanks for any help
Btw, I'm running E85
I also notice you're referencing your AFR readings in gas scale. Just out of curiosity the tune (stoich value) has been changed for e85 correct?
Because with that much injector and "enough" pump. You should not be having this issue.
Feed us some more info, I'm sure it's something simple.
Because with that much injector and "enough" pump. You should not be having this issue.
Feed us some more info, I'm sure it's something simple.
