Fuel Pressure test
Have purchased a fuel pressure tester. Need some tips on how to use it to get a good reading, instructions are vague. do I just take gas cap of before doing the test?
If your testing the fuel pressure from the pump you can do that on the fuel rail on the engine. There will be a cap that screws off with a needle valve under it. You should get about 50 psi. on this one. Yes you should leave the gas cap on.
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