2015 wrx fuel pressure at idle
In the end, you will have a smoother running engine, get better fuel economy and even get rid of that misfire or check engine light. Is it ok to drive off before the idle comes down to "normal"? This is typically noticed under heavy engine load. These codes are vital to diagnosis. [slap] at an idle it stays at 22psi, when i rev it goes up to 35-39psi. 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Subaru Tribeca P0191:  Fuel Rail Pressure Sensor → Circuit “A” → Range/Performance, Volkswagen Amarok P0191:  Fuel Rail Pressure Sensor → Circuit “A” → Range/Performance, Chevy Impala: Brake Lights Stuck On → Diagnosis. OP, when you first do a cold start, let the car warm up until the revs drop. This eliminates some driveline power loss and improves fuel mileage. P0191 is typically caused by a bad fuel pressure sensor, fuel pressure regulator, or an issue with the fuel rail pressure sensor wiring harness. That's the same range my 2013 wrx idles at. My 15 limited does the same thing, sometimes when its cold in the morning it will do it for about 1 and 1/2 minutes, other times may be 30 seconds are less depending on how long the car has been sitting. P0191 can be caused when the fuel pressure regulator is bad. Here are some of the issues that cause the WRX to stall out. I was wondering this as well. This can lead to the engine dying when coming to a stop as well. Clean the throttle body. Oil pressure was taken after cars oil was up to normal operating temp. It can really help narrow down what you need to do. It indicates that the fuel rail pressure sensor is receiving a signal that is outside of its normal range. If it goes bad, it can restrict the flow of fuel to the point that P0191 can be thrown. You’d notice hesitation and stalling as the fuel pump struggles to keep up with the demands of the engine. It’s worth a look, especially if you can’t remember the last time that you checked. My 2015 Forester XT only at 43k miles and its summer throughout the year around 90F Last few weeks my cold … Before troubleshooting any automotive issue, including stalling issues with the WRX, make sure that you check the vehicles trouble codes with an OBD2 scanner. Good luck! The most challenging part of diagnosing a stalling problem is reproducing the conditions that led to the stall in the first place. JavaScript is disabled. I installed an prosport electronic oil pressure gauge. If it goes bad (or if the fuel pressure really is out of the normal range) P0191 can and will appear. Pretty much agreeing with all input. Here are the facts: I just picked up a '15 Subaru WRX Limited with CVT and it seemed as though the idle speed - the car is started cold (~72 degree ambient temperature in the garage) - is relatively high (1,500 - 1,800 RPM) and remains there until I start driving. Discussion Starter • #1 • Mar 27, 2019. We invite you to join our Subaru Impreza WRX and STi community to discuss engine mods, builds, detailing, and more. Here are some of the more common causes of an engine timing problem: Your Subaru WRX uses a series of complex sensors to report what is going on to the ECU. This is a generic code, which indicates that it has the same meaning for the Subaru WRX as it would any other vehicle. A dirty throttle body can lead to stalling in your WRX. 2018 NUTUP STI / 2015 Buckeye Boxer WRX / 2003 Hammerdown Wagon WRX. 30psi@ idle … General Maintenance, Troubleshooting & Accidents. If the reading seems off, you’ll need to manually check the fuel pressure. Doing so very well could leave your Subaru WRX stranded. Fuel issues are one of the most common reasons that a vehicle would stall out, that includes your Subaru WRX. What about vac pressure on the boost gauge what should that be at? At cold start it reads 80-100psi depending on how cold it is. At idle speed the enginge makes a little vibration after some seconds. If the fuel pressure reading is low, than you’re going to need to figure out if it’s the fuel pump or fuel pressure regulator that is causing P0191. You can also use it to check the fuel pressure reading as you drive. Takes my car a while to get down to normal idle range on a cold start unless I start driving right away. As you can see above, there are many different reasons that your WRX could be stalling. One of the most common issues your Subaru WRX is likely to develop is a stalling problem. or is it an issue with my oil pressure? A dirty throttle body may not trigger the check engine light. If there is anything that you would like to add, please drop a comment. Here are the most common issues that cause P0191 to be thrown: The fuel pressure sensor is responsible for telling your WRX’s ECM/PCM what the actual fuel pressure of the vehicle is. At WOT it runs to 100psi (max reading on the gauge) Is there an issue with the gauge or the sensor? So, if your stalling happens when coming to a stop, and the check engine light is on, it may be worth taking a look at it. Without them, you are in the dark. Trouble codes are always a great place to start diagnosing problems on today’s modern computer controlled vehicles. Here are the most common symptoms of P0191: If there isn’t enough fuel pressure getting to the fuel injectors, the engine may stall out or hesitate in certain situations. I have a question about the idle range of my 2015 Subaru WRX after it has been sitting overnight. Air Fuel Mixture– If the air/fuel mixture is off, your WRX can stall out. Stalls can happen at any time, and it can be incredibly jarring when it does happen. Get a fuel pressure gauge or borrow one and check the fuel pressure. When P0191 is present, there typically are noticeable symptoms. If it runs too lean, you’re likely to have p0171 accompany P0191. If the fuel pressure at the injectors is inconsistent, it’ll be really hard for your WRX to maintain a steady idle speed. A bad fuel pressure sensor can force the vehicle to overwork the fuel pump, thinking that it’s constantly starving for fuel when it is not. If the converter doesn’t unlock, then the engine will stall much like a manual vehicle does when it doesn’t have enough speed to carry a gear. and it reads opposite of what i assumed. Or he is rolling down the street in his new slammed ride vaping out the window, enjoying the tow truck ride. Remember, a vehicle needs air, fuel, and spark to run. The ECU then uses this information to adjust the timing, air fuel mixture, and more. If it runs too rich, you may get black smoke and P0172. The fuel pressure regulator is responsible for making sure that the amount of fuel pressure that reaches the fuel rail is at a constant level (which will be less than pushed by the fuel pump). Is the connection to the sensor solid? Here’s a great YouTube video from EricTheCarGuy. If the manual fuel pressure reading is normal, then you know that you’ve got an issue with the fuel pressure sensor (or the wiring going to and from it). 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Subaru Tribeca Stalling → Causes & Diagnosis, Volkswagen Amarok Stalling → Causes & Diagnosis, Chevy Impala: Brake Lights Stuck On → Diagnosis. If you let off of the gas coming to a stoplight and it stalls for a second or two and recovers itself, it very well could be a dirty throttle body that is causing the problem. If there is anything that you would like to add, please leave a comment below. If there is almost no oil left at all, the engine could be on its way to locking up. When one of them goes wrong, it can lead to stalling for sure. A bad fuel pump would act exactly like a bad fuel pressure regulator.

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