On the side of the throttle body where the fuel feel line and the fuel return line go in there is another spot for a hose to go in this is for the fuel pressure gauge you must hook a fuel like into this then to your Gage fuel pressure at idle should be 14-16 psi.
the fuel capacity for jeep grand wagoneer in the 80s is between 22 gallons and 25 gallons depending on the engine size
code 25 -refers to a short or open circuit between the solenoid valve to ECM.possible broken fuel pressure regulator or short circuit from solenoid valve to fuel injector main relay. check selenoid valve.(fuel pressure regulator control solenoid)
To install the fuel pump on a 1976 Jeep CJ7, first, disconnect the battery and drain fuel from the system. Remove the old fuel pump by unbolting it from the engine block and disconnecting the fuel lines. Install the new pump, ensuring it aligns properly with the mounting holes, and then torque the bolts to the manufacturer's specifications, typically around 20-25 ft-lbs. Finally, reconnect the fuel lines and battery, and check for leaks before starting the engine.
fuel pump is bad
Should be at least 10 at idle. 25 at idle would be better.
that is too low of pressure.
If it is multiple port no less then 40 psi, if it is TBI throttle body fuel injection no less then 25 psi.
Fuel pumps for carburated vehicles typically put out less than 1 psi, typically around .25 psi. Just enough to get the fuel into the fuel bowl. The pressure needs to be small so that the float assembly can shut off flow when the bowl is full. The typical fuel pressure may not be relevant to your vehicle. Yours may require higher fuel pump pressure but not typically.
there were no 5.3 in production in 1988; but on a small block Chevy in 1988 you should have 22-25 psi
50 to 85 psi engine not running. 25 to 35 psi engine running.
The only small SUVs with a body on frame is the Jeep Wrangler, Dodge Nitro, Jeep Liberty. All the rest are large SUVs.
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