Skip the auto shop - Our mechanics make house calls

Q: intermitant failure to "fire up"

asked by on

Car runs fine then, 3 times (at least 2 wks apart, then 1 wk) failure to fire up. it is trying to turn over but will not. No check engine light. not on cold start. Each time it started up after I turned off a/c (thought maybe battery or alternator). This last time turning a/c off didnt matter, letting it sit for an hour - didnt matter. Had it towed to my home. In the morning still doing the same. Then I took out fuse to EFI (though appeared to be good) and it started up. ??? Put fuse back then tried starting again and failed. Pulled and put fuse back in (thinking maybe not seated correctly) and started up just fine. To me it appears the fuel pump has power and is working. I am wondering if it may be a clogged fuel filter that is just on it's last leg of filtering and doing its best. Your thoughts?

My car has 164000 miles.
My car has an automatic transmission.

A: I would suggest check to be sure the Mass A...

I would suggest check to be sure the Mass Airflow (MAF) sensor is working properly. The symptoms you are describing are very common when this fails. As you may know, this regulates the flow of air into the engine allowing for the proper air/fuel mixture. When this isn’t functioning correctly, an imbalance in this mixture will cause intermittent problems much like you describe. I would recommend having a certified expert, like one from YourMechanic, come to your home to diagnose your starting issue and help you make the necessary repairs.

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: No power to the ignition.

When hooking up the battery cables backwards, the polarity of the voltage is reversed and will cause the fuses to pop, the alternator to burn out the regulator, and the computer (ECM) will burn up the ground circuit inside the...

Q: White smoke from the engine and smells of rubber with the knocking sound

My guess is that you have a leak somewhere, most likely a coolant leak. Coolant leaking onto a hot engine will immediately result in white smoke. Since you stopped the vehicle before all of the coolant was lost, the vehicle...

Q: esp bas light on dash keeps coming on

There is a TSB (technical service bulletin) for this issue. It does say the brake switch is the source of the problem. At least it can be the source of the fix. But it doesn't say replace the switch. Apparently...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...