My truck started hesitating and stumbling under partial throttle load. I initially thought it was the COPs but after installing some Weapon-X COPs and new TR-6's the issue is still there. The pumps are Walbro's with a steel Y fitting and are relatively new (just over a year old with less than 10K on them)
Under heavy engine load my fuel pressure gauge jumps between 40-50psi IIRC.
A/F gauge reads 14.8 at idle and around 11-12 under moderate to heavy load. Haven't tried WOT. I still make decent boost.. Checked for vac leaks and its all good.
Any ideas?
My truck is being a grumpy bi*ch since arriving from cold Calgary to Houston.
Under heavy engine load my fuel pressure gauge jumps between 40-50psi IIRC.
A/F gauge reads 14.8 at idle and around 11-12 under moderate to heavy load. Haven't tried WOT. I still make decent boost.. Checked for vac leaks and its all good.
Any ideas?
My truck is being a grumpy bi*ch since arriving from cold Calgary to Houston.