Your engine needs the correct amount of fuel in order to keep the fuel volume and pressure within specifications.
Too little pressure can starve the engine of fuel, causing it to run lean, misfire, hesitate or stall.
Too much fuel pressure can cause the engine to run rough, waste fuel and pollute.
Here are a few ways to do fuel system testing, and how to avoid common mistakes in diagnosing fuel systems.
A malfunctioning fuel system can prevent an engine from starting but so can other problems such as lack of spark, a blocked air intake, or a broken timing belt and simply no fuel in the fuel tank.
Be sure to rule out these possibilities before continuing fuel system testing.
Choose Your Help Topic Below
Fuel Pressure Regulator FAQ Do You Have The Correct Pressure
Fuel Pressure Regulators – Function And Failure Symptoms
How to test injectors using a Noid Light
Fuel Pump Related No Start Problems-What Should You Do !
Having Fuel System Related Problems – Not Always Easy To Solve
Fuel Pump Relay – Function And Testing Procedures
(O2) Oxygen Sensor – What They Do – How They Fail – Rich-Lean Testing
Fuel Injectors – Will Usually Only Fail In One Of Three Ways
Hard Starting Engine – Cold, Hot, Both Or Just After Refueling
Fuel Wash – How To Eliminate This Potentially Serious Problem
Engine Misfire Causes – Fuel, Ignition, Coolant Or Compression Related
Mechanical Fuel Pumps-Basic Information And Troubleshooting
Fuel System Related Problems – Not Always Easy To Solve
No Start Problems-Fuel Pump Related-What Should You Do !
Fuel Injector – Deposits Can Build Up And Clog The Fuel Injector
Gas Getting Into Oil – What Can Cause This To Happen ?
Gas Leak – If You Smell Gas This Could Be A Sign Of A Gas Leak