Prevalance of failure of stock FPR?
It looks like out of the blue over the last 3 months my AFR's have become on average 1 - 1.5 points leaner and I can feel it, especially at idle.
Maybe because its the summer, but I want to eliminate the potential that it is the FPR. The car has 30k miles on it so I doubt its the fuel pump. While I know its not catastrophic and can be easily remedied by a table update, I am paranoid because I dont remember if I had modified my tables for this same exact issue before or not. Are there any known cases or patterns of failing stock fuel pressure regulators on turbocharged miatas? |
not that I know of, you could test the rail pressure tho to make sure.
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fuel filter?
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I popped one a while ago. It happened really quickly while I was tuning. I did a couple of pulls and noticed the AFRs were half a point leaner suddenly, and then I started a pull and it pegged at 17:1 as soon as I entered boost. I nursed it home at 15-16:1. Pinched the return line and the pump was fine, so I swapped FPRs and it solved the problem.
It happened right after I installed a DIY dual feed rail, I swapped back to a stock rail after that. No idea whether it's coincidence or a shaving I missed or what. |
Originally Posted by cardriverx
(Post 565847)
not that I know of, you could test the rail pressure tho to make sure.
Originally Posted by Braineack
(Post 565887)
fuel filter?
You really think it could do that. |
pull the vacuum line off the FPR, if there's fuel there you know it's bad.
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Nice, I will do that ASAP.
Should I do it with the car running or with the car off? Thanks Scott. |
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