WS4 Fuel Pressure and flow

Fuel Pressure and flow

Warning, be careful around raw fuel. It can catch fire! Use appropriate safety precautions.
Keep sparks, flame, your body and your clothing away from raw fuel! Know where your fire
extinguishers are and use them if necessary.

Locate the two closest fire extinguishers. Write down where they are: 
The fire extinguishers one is in the front of the shop and the second one is on front of the next shop.

Attach fuel pressure gauge and notice which scale on the gauge you will be using. Briefly turn key on or start vehicle, then turn it off. Check for fuel leaks
I attach the fuel pressure gauge and then we  watched the scale on the gauge after that I turned on the car and check for any air leaks and that's no leak.

Measure the fuel pressure with the key on, engine off.
Record it here: 35psi 

Idling: Measure the fuel pressure with the engine idling. Watch the pressure for a couple of minutes 
Record pressure here: 38psi 

Maximum: With the engine idling, use the special tool to clamp the fuel return lin.
Note: this can only be done for a short period
Record pressure here: 48psi

WOT: With the engine idling, disconnect an plug the vacuum line going to the fuel pressure regulator
Record pressure here: 48psi  

Residual: Turn off the engine, and watch the fuel pressure for five minutes
Record your residual or rest pressure here: 43psi

When I've done those test then i had turn the key on and off, check for any leaks that might have happened during the test . I had to make sure the car was safe and runs fine. Its important to to keep the fuel being injected into the motor at the right amount too much pressure would engine run in rich and could have dripping injectors too little pressure would mean to engine would run lean and lacking in power.

When I have low fuel pressure I will have low engine performance engine running rough due to the lean mixture it might take longer to start the engine sometimes. also when we have low fuel flow the engine will be misfiring also low engine performance and engine will be rough as well due to lean mixture and fuel not being able to atomize well. But its different when we have high fuel pressure the engine will be running rich which mean higher fuel consumption could end up in dripping in injectors making the engine harder to start also will be using more gas or wasting it could end up costing you a lot of money on gas .