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Re: What should fuel presure be and what type of gage...
Most parts stores will have a loan-a-tool pressure gauge. Your shop manual will have the pressure spec. Don't have a manual? You should buy one for lots of usful info.
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Check for fuel pressure at the primary fuel filter. there if you move the plug for the fan clutch you can see an auxillary plug on the filter housing facing forward and to the driver side. You should have 40+psi with key on. another way to check the pump is to listen for it to cycle on for 10 seconds or so after key on. Also check for lubricating oil pressure on the cluster gauge and then high pressure oil with a manual gauge. its needs to see around 600psi oil pressure to signal the injectors to fire. best way to check all of these is with a scanner that has data reading, which will also tell you if you have a bad ficm, ecm or sensor connection.
you hook a fuel presure gage into the shader valve( looks like tire valve stem) that should be toward the front of the motor toward the top. Fallow the fuel rails i believe that should get u going in the right direction
YOU CAN HOOK UP A FUEL PRESURE GAGE ON THE FUEL LINE GOING INTO ENGINE NORMALY ITS ABOUT 50 TO 60 PSIS ALSO IF YOU TURN YOUR KEY ON AND OFF YOU MIGHT BE ABLE TO HERE IT TURN ON AND OFCORSE IF IT DOESNT START
i have an 88 chevy truck, not getting gas to come out of injectors.. getting gas all the way through the lines all the way up to the tbi but not out of injectors. pressure gage check done! new fuel regulator done! . u can put gas in the throttle body and it fires right up.??
Put a fuel pump gage on and check for 24-28 lbs, and leave gage on all day to see if you losing presure - If a slow drop in presure then it may start or not till the presure is up
You will need a fuel pressure gage that you can purchase any Auto parts store. The schradder valve is on the fuel rail. You may have to remove the plastic cover which should consist of a 10 mm wrench to access the valve. 37psi would be a good number to have...good luck.
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