2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

LSJ Fuel System Question

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Old Jul 11, 2011 | 03:37 PM
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insylem's Avatar
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From: Wisconsin
LSJ Fuel System Question

Hello,
I did some reasearch, and found that our fuel pulse dampner is on the end of the fuel rail. Good place for it. But that being the case, what is that flat round thing on the fuel supply line that feeds to the fuel rail where it has the fuel test port?
I cant find a name or part number for that anywere.
Also,
Is there an upgraded pulse dampner that we can get ? Do we need a upgraded one if we have larger injectors?
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Old Jul 11, 2011 | 03:58 PM
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From: tax free NH
I took that apart one time, it was just a fitting, nothing in particular there really it was all machined metal. As for a larger pulse dampener, well that I'm not sure about. I've never seen it mentioned, but since most people don't upgrade the fuel pressure (unless they go return style, which would remove that dampener) they have no need for a different dampener since the pressure is "consistent" in the rail at like 55 or 57#s.
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Old Jul 11, 2011 | 04:06 PM
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Well when I hook up my fuel pressure tester to it, the gauge needle bounces fast, almost vibrateing between 50 - 60 psi. That is with the engine at Idle. How much needle bounce should I be seeing before I should consider replaceing the pulse dampner?
I have the Aeroforce Fuel Pressure kit installed as well, and I think all the pulsing as destroye my sensor as the output is stuck on constant High.
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Old Jul 11, 2011 | 04:12 PM
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From: tax free NH
hmm, well I'm on the stock fuel system, with 60's and when I had a tester on the schrader the needle was barely moving side to side, less than 1 or 2 psi in each direction. you may have a problem with the damper, yes, however with the aeromotive parts installed that changes things a bit. the fuel pump is constantly running with the engine on, providing constant flow at [value]GPH so there should be no pulsing really, so I'm not sure if your aeromotive fpr is screwing things up cause it seems like it may be.
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Old Jul 11, 2011 | 06:13 PM
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From: KY
no there isent an updated dampner
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Old Aug 7, 2011 | 10:37 PM
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From: Wisconsin
Update: Swapped out my fuel pressure dampner today at the end of the fuel rail. Now my pressure only bounces about 2 psi at idle.
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