Q: Running problem

asked by on

Vehicle shut off while driving friend had code reader found maf code vehicle was a no start with a discount parts store maf sensor if you crack the throttle it will start run like it on one or two cylinders all header pipes hot no codes has good fuel pressure injector pulse and spark no exhaust restriction. If I plug and unplug distributor harness connection the fuel pump and a/c will also cycle?? Any help??

My car has 24000 miles.
My car has an automatic transmission.

Discount parts are always suspect and I would never advise anyone to use them for this reason. I recommend purchasing a reputable part.

An often missed problem with diagnosing the MAF sensor are vacuum leaks. MAF stands for (mass air flow) sensor. It measures the amount of air entering the motor. If air is entering the motor from other areas, this will often set a MAF code. Also, in the future, please supply us with the code that is set. We can use it to better narrow down what is going with your car.

In addition to vacuum leaks, check to see if the hose from the MAF to the throttle body has a crack in it. This will effectively bypass the MAF and the car won’t run and it will often run if you give it throttle as you describe. Aside from this, inspect the wiring harness to the MAF. Check the connector to the MAF and the pins at the MAF. The pins can get bent over or pushed in when you are connecting the connector.

As for plugging and unplugging the distributor harness and the fuel pump and A/C cycling, I wouldn’t place any importance on this in the context of your car dying.

Aside from the above advice, the use of a scanner to review data is necessary for a more comprehensive diagnosis. Your typical code reader is not a scanner. If you don’t have access to a scanner, have a certified mechanic thoroughly diagnose your Check Engine Light codes to help you figure out how to best proceed and repair your car’s stalling problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Running problem

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Check Engine Light. Trouble code P0141 appears but all sensors are new. Engine still stalls.

Hello. Depending on why the Check Engine Light is still coming on would determine if it is safe to drive it. If you are getting codes related to the oxygen sensors and the catalytic converter then you may have the...

Q: Hi, I have 2007 mercedes banz and check engine light in my dashboard with a code P0017.

With the code P0017, the crankshaft position sensor is not picking up the engines speed properly. Check the following areas for any issues to fix your P0017 code issue. Check the following: The timing chain could be stretched The...

Q: my tbi injectors dont inject gas

Hi there. If you accidentally put the terminals on the wrong posts when hooking up the battery, then there could have been all kinds of issues that fail within your vehicle. The tbi injectors circuit may have blown the fuse....

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.