Skip the auto shop - Our mechanics make house calls

Q: Running in failure mode - 1995 Ford E-350 Econoline Club Wagon

asked by on

My van was running in failure mode today. The engine is running lean at about 290K with too little fuel and too much air. I’m thinking about installing new injectors. I installed new O2 sensors, new Mass Air Flow sensor and it actually idles better with the MAF disconnected. There is low voltage at the MAF. But a previous test showed it was OK. I am planning to install a new Idle Air Control and a distributor 351 Windsor. Do you have any suggestions for me?

A: I would first check voltage to the MAF - it...

I would first check voltage to the MAF - it should be 5 volts. Also check ground quality for the MAF. Since the fuel injection computer gets airflow volume data, a bad MAF reading will mis-instruct the injection computer. Also possible you have a bad "new" MAF, but more likely with this age and mileage to have a bad electrical path (corrosion, connector, bad ground, etc.). If the MAF tested with proper voltage earlier, walk back through what you touched since. Something changed! If you would like a certified technician from YourMechanic can assist you in diagnosis, and repairing the failed electrical components.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Dashboard backlight randomly doesn't work

The dash lights on your instrument cluster is controlled by the dimmer control module or also called a dash light brightness controller on the left side of the steering column. While watching your radio lights, turn your headlights on and...

Q: Check engine light still on after cleaning mass airflow sensor

First check to see what codes are being set which cause the Check Engine light to illuminate. This problem may or may not be caused by the mass airflow sensor. If it is the MAF, and cleaning it was unsatisfactory,...

Q: 2006 Honda Accord EX 2.2L Vtec cuts off

It's a 2006 Honda Accord, and generally on those, when they do that, it's the ignition losing spark. Some guys tried to fix the distributors and put new pick-up coil or a new amplifier inside, but really, just put another...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.