Q: I change MAF & 02 sensors n now my truck won't even start

asked by on

I change MAF & 02 sensors n now my truck won't even start I put a lil of starting fluid n it starts fir a lil n dies out

A no start diagnostic would reveal the issue. If you are able to get the engine to run momentarily by introducing "fuel" into the intake, in your case starter fluid, that would point toward the issue being fuel system related. If you have never changed the fuel filter, that is not a bad idea given the year of your vehicle and is harmless as it should be done anyway after so many years. Check to see if the fuel pump in the tank makes noise as the key is turned to the "on" position (pump should momentarily "whirr" as pressure develops; if no noise there is pump/pump circuit issue). Basically, during the diagnostic, fuel pressure would be tested but the fuel injectors themselves might have to be evaluated. If any diagnostic trouble codes have set and are downloadable that would help. It is also possible that something like a faulty temperature sensor could cause your issue if the PCM is getting a false "warm" engine signal when in fact the engine is cold. A consequence of such a false sensor output would be inadequate fuel is supplied on cold starts. If you desire that YourMechanic resolve the issue for you, please schedule a no-start diagnostic.

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. I change MAF & 02 sensors n now my truck won't even start

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: Q: Check engine light turns on and off

Both of these codes are related to the oxygen sensor readings. More often than not, this will be caused by failing oxygen sensors. There could be other issues that can cause these codes, such as an engine misfire, failing catalytic...

Q: What does my car start shaking when idling 1997 Ford Taurus

Hello. This can be caused by a number of things. Most of the time the issue is caused from a vacuum leak in the engine or a failure in the idle control valve. This is only true if the issue...

Q: Overheating and smoking

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

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...
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.