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is new pump weak, or is it stronger?
Quote:
Originally Posted by 80stech
Sounds like you might have a weak fuel pump for a while and/or maybe a restricted fuel filter. Maybe reset adaptations and don't focus as much on the fuel trims.
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I would think that it's the opposite; my old fuel pump was weak, causing a lean condition (it barely made 50 psi, four years ago, and didn't hold pressure in the line for long). Now, I'm getting increased fuel flow, causing a temporarily rich condition (possibly for awhile, as the fuel maps adjust?), as evidenced by increased acceleration, and negative fuel trims.
I've experienced wild swings in performance on a couple of vehicles before, after changing component(s): 1.) a CPU + high-powered fuel pump +injectors + race tune, and even on 2.) on a pickup truck, following a simple battery replacement (it had to re-learn everything, for some reason...my '04 Chevy 2500HD).
At least that's what I'm hoping it is, otherwise I'm going to have to use the parts cannon (fuel filter, regulator, lines, etc.).
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01 BMW X5 E53,3.0i-5L40E, 7/13/01
topas-blau,Leder-grau,"resto-project car"
Here:
14 Lexus ES350,3.5L-U660E
09 HHR Panel,2.2L-4T45E
04 Chevy 2500HD,6.0L-4L80E
98 GMC Sierra 1500,5.7L-4L60E
Gone:
66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake
08 Cobalt Coupe,2.2L-4T45E
69 & 75 C10s,350c.i.-TH350
86 S10,2.8L-700R4
73 Volvo 142,2.0L-MT4
72 & 73 VW SuperBeetles,1.6l-MT4
64 VW,1.2l-MT4
67 Dodge Monaco 500 2dr ht.,383c.i.-A727
56 Chevy 210 4dr,265c.i.-PGlide
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