Review on 🔧 Bosch 0928400535 Fuel Injection Pressure Regulator Metering Unit: Enhancing Engine Performance by Josh Lockhart

I ordered this part to fix my Duramax LB7 engine idling. At idle the engine revved like a big cam race engine and then flattened out above 1000 rpm with a 2200 rpm ceiling. Check the actual and desired fuel pressure with a scanner. If the actual value is 180MPa, it means it is running at full pressure and behaving as if the regulator is disconnected or worn out. Check all of your connections before changing this suction cup, especially the connector behind the fuel rail. With all of the plugs in and secured, check the voltage going to that plug, but it is very likely that you will need to replace that particular part. You can also purchase a 3 1/4" Torx T25 1/4" socket to get the third screw that sits between the regulator body and the CP3. Makes life easier.