Trouble code P0088 means: Fuel rail/system pressure too high
Trouble code P0088 means: Fuel rail/system pressure too high
The catylist is overheating from too much unburned fuel going through your exhaust or (possibly) restricted causing too much backpressure. You should have a code a bad 02 sensor can ause this since it won't trim the fuel and it will run rich also a bad fuel pressure regulator, so rail pressure goes sky high.
you will need to hook a pressure gauge up to the fuel rail. If the correct pressure is not obtained then the pump is bad. If too much pressure then your fuel pressure regultor is not working. You will need to find out what the normal operating PSI range is for this pump first.
Look on top of the engine at the inlet side of the fuel line from the fuel tanj and you will fine a Fuel Pressure Regulator. have it checked. It sound like it is stuck open. It is suppose to open and close to regulate the proper pressure to each of the fuel injectors.
There'll be some pressure relief, as the fuel system is pressurized - however, the high pitch sound seems to indicate that there's too much pressure in the fuel system. There's a possibility that the breather on your fuel tank is clogged.
Try changing the fuel filter. If that doesnt work put the fuel rail on a pressure gauge. If there is too much pressure then your fuel regulator is not working properly or your return lines to the tank are fouled up somewhere. If the pressure is too low then the fuel pump is getting ready to go. You can get a fuel pressure gauge at Harbor Freight for less then ten buck. Then check the plugs, air filter, etc just to rule it out. Its somewhere to start anyway.
yes 181 is way too high for bld pressure
too lean at higher load - Leaking fuel injector or pressure regulator - High fuel pressure condition - Faulty front HO2S - Leak in exhaust system - MAF sensor faulty
The fuel pressure is WAAAY too high 35 psi is about what it should be at. New fuel pump is needed. That should be your solution.
You'll need a fuel pressure gauge. Many auto parts stores borrow or rent them. Many engines have a test port on the fuel rail on top of the engine that looks like a tire valve. For engines that don't have a test port, you'll need to remove the rubber fuel supply hose where it comes from the body to the fuel rail and fashion a tee to attach the gauge. Most better gauge kits come with the parts to do that. The actual pressure can vary too according to changes in engine vacuum. Most tests specify the amount of pressure you should have with the engine not running. You'll likely have to bypass or activate the fuel pump relay to keep the pump running when the engine is not rotating.
Correct me if I am wrong but a fuel pump does not hold fuel pressure it maintains the fuel pressure needed for the vehicle to run. What holds the fuel pressure is the fuel injectors and believe it or not the fuel pressure not only regulates the fuel pressure but also holds it. If the regulator is bad your vehicle will not hold the pressure needed to run the fuel pulse dampener also plays a small roll in this question too