Guys, tried to measure fuel pressure on-road - 45 psi on all revs. Is it OK?

pressure between 38-42 psi is good

damn, trying to find a reason of problem of twitching (uneven acceleration) on mid revs between 4000 and 5500 with wide open throttle... can`t find any... :(

wow! today it shoed 55-60 psi on-road... don`t you think it is too high?

With the engine in idle, check the fuel pressure. It should be 36-38 psi with the vacuum hose attached to fuel pressure regular. With the vacuum hose off, it should be 43 psi. If you have an aftermarket fpr or fuel pump, they will throw off the fuel pressure.

pressure is 55-60 for all range of revs :(
I used walbro pump for 3 months with stock FPR, now I have a stock pump there... maybe walbro killed my stock FPR?

nothing happens when vacuum hose is off, by the way, it is still 55-60...

pressure is 55-60 for all range of revs :(
I used walbro pump for 3 months with stock FPR, now I have a stock pump there... maybe walbro killed my stock FPR?

nothing happens when vacuum hose is off, by the way, it is still 55-60...


This does not sound normal. You may have a faulty fuel pressure gauge, clogged return line, clogged filter, or bad fuel pressure regulator. The specs that 5-Speed described above are what to expect or adjust to.