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.

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?
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. intermitant failure to "fire up"

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: Throttle issue

What you are describing sounds like hesitation. The most common cause of hesitation is the MAF, or Mass Air Flow sensor. This sensor is solely responsible for measuring the air going into the engine, and with the air, the computer...

Q: I accidently hit the bottom of my car and now when I start it up the idle is at 4k. The gears shift horribly...what needs to be do

Unless the faulty operation, that is the high idle, is a coincidence, something on the vehicle was damaged when you ran over the obstacle. That something will be identified during an inspection. As far as your question about whether it...

Q: crankshaft position error code p0336

This code is related to the crank position sensor. Since you just had it replaced, it may be possible that the mechanic forgot to clear the code in the car's computer. I would suggest taking it back to them to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.