Can a fuel pressure regulator get stuck?
Fuel Pressure Regulators Commonly Fail, In One Of Two Ways: When the fuel pressure regulator gets stuck and builds up more pressure then it should; it’ll cause the injectors to deliver too much fuel; causing a rich mixture (high pressure) condition.
Can bad fuel pressure regulator cause hard starting?
A bad fuel pressure regulator can create a difficult to start or ‘no start’ engine. If the ECU can’t measure the excess fuel coming through the fuel pressure regulator vacuum line, it will usually cause the engine to run rich (too much fuel). When the engine is hot, this can make it harder to start the engine.
How do I know if my fuel pressure regulator is working?
Symptoms Of A Bad Fuel Regulator
- Engine misfires/poor acceleration.
- Black smoke coming from the exhaust.
- Spark plugs appear black.
- Reduced fuel mileage.
- Gasoline in the vacuum hose.
- Engine backfires.
- Engine won’t crank.
- Excessive fuel pump noise.
How long should a fuel pressure regulator hold pressure?
For the specification we must consult service-data, but the system should hold some pressure for about five-minutes.
What causes a C7 engine to not start?
If the air pressure releases from the cylinder then you probably don’t have broken piston rings, blown head gasket, or a scored cylinder. Also check the fuel pressure regulator (valve) in the back of the head. C7 engines have problems with the fuel pressure regulator not maintaining enough fuel pressure especially when cranking.
What should fuel pressure be on C7 ACERT cat?
You could still have a fuel pressure problem. Even though you have replaced the fuel pressure regulator, you could have a problem with the fuel transfer pump. I would install a PSIgauge and check the fuel pressure while cranking. The C7 needs at least 25 psi to start.
What to do if your C7 ACERT cat wont start?
The only other thing is if the regulator or transfer pump you installed is faulty. The only way to test would be to install a cutoff valve at the inlet fuel line to the pump and the return fuel line at the regulator. When the engine is shut down, turn one of the valves off and wait. Then open the valve and see if it starts.
What causes high oil pressure in a Caterpillar engine?
The most likely cause of your high oil pressure is a faulty oil pump. I have seen this before. If the relief valve in the oil pump sticks closed, it will cause high oil pressure. Let me know if you need more help. Experience: 23 Years Caterpillar Engine experience. Was this answer helpful? 23 Years Caterpillar Engine experience. 2009 Cat C7 Acert.