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After two days car did not start. mechanic say it is fuel pressure regulator - full hosing unit. Mechanic blocked off air hose. is it safe and what is the influence on performance?
Re: After two days car did not start. mechanic say it is...
The regulator reduces fuel pressure at idle. When deactivated, your fuel pressure will be high, possibly reducing fuel efficiency due to rich operation. You should install a new regulator when possible.
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There are several potential causes for a car stalling at low RPMs in gear, and a vacuum hose problem is one possibility. Here are some other things to consider:
Fuel delivery issue: If the car is not getting enough fuel, it may stall at low RPMs. This could be due to a faulty fuel pump, a clogged fuel filter, or a problem with the fuel pressure regulator.
Ignition problem: If the car is not receiving sufficient spark at the spark plugs, it may stall at low RPMs. This could be caused by a faulty ignition system, such as a failing ignition coil or a damaged spark plug wire.
Clogged air filter: If the air filter is clogged, it can restrict the flow of air to the engine, which can cause the car to stall at low RPMs.
Throttle body issue: If the throttle body is dirty or malfunctioning, it can cause the car to stall at low RPMs.
Mass airflow sensor problem: The mass airflow sensor measures the amount of air entering the engine and sends this information to the engine control unit (ECU). If the sensor is not working properly, it can cause the car to stall at low RPMs.
To determine the cause of the problem, you may need to have the car inspected by a mechanic. They will be able to diagnose the issue and recommend the appropriate repair. In the case of a vacuum hose problem, the mechanic will check for any leaks or damage to the hose and replace it if necessary.
Dont go back to that mechanic ever. Chec under hood for any loose wires,bolts or hoses. Probly somethin simple from carelessness. Find a nice shop at surecritic.com
It sounds like your car isn't getting the proper amount of gas. You say your mechanic changed the fuel pump and the regulator. Id have him run a diagnostic tool on it to see if it throws any other codes. Its getting fire. Try changing the FUEL FILTER. it maybe clogged. maybe the pressure regulator is not giving it enough pressure to push the gas into the engine or maybe the fuel pump is only working at times. Does it run good and then start to spit and spudder then die? if so its not getting gas some how. Idk if you can adjust the pressure regulator or not. i mostly work on old school cars.
I would replace any faulty hose to a regulator for a start. I would say that the injectors are under full fuel pressure and the cpu is having regulating the required amount of fuel which is what all your problems amount to. Have the fault codes read. Replace faulty items. Use only genuine items as non-genuine replacement are not always compatible with the OEM fitted CPU units.
Well, the problem is this..... There are many sensors that feed information to the ECU (Engine Control Unit) but here are the normal problems that effect the Air/Fuel Ratio with the GM Products but your Mechanic Friend may be wrong and would be more beneficial to know what exactly it is doing
a. Mass Air Flow Sensor b. Air Temperature c. Idle Air Control Valve
other common problems with this model include Leaking upper intake Leaking Vacuum Hose or a Vacuum leak in a hose
the list goes on and on so until I had more information, I do not know what else to offer at this time.
more than likely your fuel pump went out. it's in the tank. you can try spraying carb cleaner in your throttle body and have someone crank it. spray small amount of carb cleaner beware of backfire. do not acclerate while cranking. if vehicle turns on its your fuel pump
Here are some possible causes, I would start with anything related to replacing the intake.
Air leaks in intake manifold, exhaust pipes or exhaust manifold Fuel control sensor is out of calibration Low fuel pressure (fuel filter clogged, pressure regulator failure) One or more injectors restricted or pressure regulator has failed O2 sensors contaminated, deteriorated or has failed Vacuum hose is disconnected, broken, leaking or loose
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