lxsv8
New Member
- Messages
- 16
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- Gold Coast Australia
Definitley has a return line!
Yep, test out the fuel pressure and see if it's good.Sounds like fuel to me as well, I still dont see how fuel pressure can go above the factory intank regulators setting.
I would hook up a fuel pressure guage and check to make sure that the psi is not dropping. That would at least rule it out or confirm the issues.
My car happens similarly. Cruising is very lean. However, as long as I press the gas in, it goes richer and richer. After letting go of the gas after boosting, it goes way too lean. Even if I was cruising and letting go the gas immediately, it also goes lean. Sometimes was over 18:1 ratio.Guys,
Old thread I know.
I'm having a similar problem and am wondering if an answer was ever found.
At higher road speeds, if I coast and then very lightly push the acc pedal, it bucks and goes lean, off the wideband gauge. Kinda flucuates from lean to rich very quickly. Goes away as soon as I push the pedal a little more.
I don't have this problem.Also, from a stop, if I hit the throttle fast, it bucks and jerks and goes lean off the gauge.
I don't know if it's related to the TPS or not. And maybe the vac is leaked somewhere. I think that you may just install the high flow/high pressure fuel pump so you don't have to worry about bypassing the fuel pump. I know your supercharger is a little harder to change the boost, but if you can, go down to 6 psi and troubleshoot it. With less pressure on the engine and the engine can actually cope with 6 psi, it's easier to troubleshoot the issue.My high speed (60mph+) light pedal problem has been going on for a couple of weeks, but it's recently gotten worse. The jerking from a stop problem is new. I assumes the two are related. Both problems go away when I press into the pedal more. And, otherwise it runs fine.
I'm going to check the TPS specs at work a little later, and I will also unbypass the fuel pump ecu and see if anything changes.
It wouldn't surprise me at all if I have a vac / boost leak somewhere.
KC
I don't know if it's related to the TPS or not. And maybe the vac is leaked somewhere. I think that you may just install the high flow/high pressure fuel pump so you don't have to worry about bypassing the fuel pump. I know your supercharger is a little harder to change the boost, but if you can, go down to 6 psi and troubleshoot it. With less pressure on the engine and the engine can actually cope with 6 psi, it's easier to troubleshoot the issue.