I have taken my 2007 Nissan Versa Hatch back to the dealership twice to have my fuel regulator fixed. My car does not want to start right away and when driving the RPM'S surge. Is it safe to use a Gas Treatment in my Versa to help keep the fuel moving better? I read in the drivers manual not to and was afraid. Please help!
I agree with Gary, it's not likely the regulator. More than likely it is the check valve in the fuel pump that doesn't hold the pressure after the car is shut off. Adding a treatment won't do anything but drain your wallet.
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Nissan does not recommend to due to the fact that some of the solvents can deteriate parts of the fuel injectors. On the other hand I have managed multiple auto service facilities and have performed injector cleanings with no problems.. The surging that you are experience does not sound like faulty or clogged injectors(especially given the year of your car). As far as the regulator goes I doublt that is the fault either. The need to check fuel psi. to be sure. Are and fault codes appearing(check engine light)?
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