Higher than 35 psi but not exceeding 65 psi
as pressure is determined by volume supplied by the pump then is logical that with a low pressure there is less volume and so injectors can be starved at acceleration and when full power is needed
at the extreme end , excessive pressure will cause injectors to leak and fuel to leak past injector seal causing poor economy and flooding
SOURCE: fuel pressure regulator had no vacuum line connected
another engineers wet dream. think of it this way . what is normally in the intake when the engine is running.. answer vacume, hence the regulator gets its vacume without a hose connected to it as its already in a full time vacume chamber.no hose required . ps be carefull to seat the regulator and o rings securely into the housing befor you reattach the secureing metal clip.
good luck chris
SOURCE: 1997 Monte Carlo when driving 55-60 motor drops down to 34-40mph
A RESTRICTED FUEL FILTER WILL PROHIBIT PROPER FUEL DELIVERY....CHECK THE FUEL FILTER OR POSSIBLE A WEAK FUEL PUMP...THE ENGINE MAY BE STARVING FOR FUEL AT HIGHER FUEL DEMANDS
SOURCE: 1999 monte carlo starts for
I corrected the proble by changing the ignition module It was just under $100 at a local auto parts store
SOURCE: fuel leaking into vacuum line on fuel pressure regulator
If you have fuel on the vacuum side of the reg, that means the reg is leaking,causing a variaty of drivabiliy problems. Replacing this reg is very straight forward. Just add a little lube to the O-ring on the reg before installation. Good luck.
Yours Moe.
SOURCE: my 2002 monte carlo`s fuel gauge fluctuates from full to empty
Hi you need a fuel level sensor
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