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2nd Generation
Fuel pressure jumping under load... help please
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<blockquote data-quote="Scotts Elle" data-source="post: 8495112" data-attributes="member: 32566"><p>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)</p><p></p><p>Under heavy engine load my fuel pressure gauge jumps between 40-50psi IIRC.</p><p></p><p>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. </p><p></p><p>Any ideas?</p><p></p><p>My truck is being a grumpy bi*ch since arriving from cold Calgary to Houston.</p></blockquote><p></p>
[QUOTE="Scotts Elle, post: 8495112, member: 32566"] 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. [/QUOTE]
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Fuel pressure jumping under load... help please
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