Fuel Rail Pressure Fluctuation (Attn: Pat)

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07-30-2018, 09:21 PM

MikeGyver

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Fuel Rail Pressure Fluctuation (Attn: Pat)

I remember you mentioning something about a pulsation damper. I was wondering if you had fuel pressure pulsations that caused some kind of problems, and what were the symptoms? I found my AFR spazzing, and the fuel pressure being spastic with the same frequency as the AFR fluctuations, roughly 10 cycles per second. I am hoping to find a cure for my rough idle

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07-31-2018, 04:30 AM

03sierraslt

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I didn’t have it on my truck but I’ve seen it on others and so has Rob. What rpm? It’s like 2xxx rpm from what I recall.

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07-31-2018, 04:38 AM

smokeshow

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How's the fuel rail setup look? Typically just disrupting the fuel 'take' pattern will get rid of that issue. Might be as easy as moving the fuel crossover. Lengthening it is also an option, long as its not a hard line.