Q: Intermittently doesn't start

asked by on

Intermittently cranks but doesnt start thinking ECU but dont know what other model cars use the LYU 2, LYU 3, LYU 4 It runs no problem for 2days or 3 & out of blue cranks but dont start changed a few things & it works 2-3 days then back to beginning also when done trying to crank & i turn key back it backfires
My car has a manual transmission.

Hi there. There could be several reasons for your vehicle’s intermittent no start issue. From the description you have given, I would not think the ECU (electronic control unit) is your vehicle’s problem. Assuming the ECU is not recognizing the fault, I would look in the direction of a possible intermittent ignition module failure.

The cranking and turning the key back which results in backfiring could be a faulty ignition switch. It could also be an intermittent control relay problem(https://www.yourmechanic.com/services/fuel-pump-relay-replacement). I recommend having your vehicle’s intermittent no start issue be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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. Intermittently doesn't 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: My car crank but does not start.

Hi there. Check the camshaft position sensor and see if it has failed. Usually the engine will start and run with a partial failed camshaft sensor, however, when the sensor has failed completely and lost communication to the computer, then...

Q: The car stalls at low RPMs and during idling

A sticking or stuck idle air control valve can cause this condition. The valve needs to be removed and inspected for excessive carbon buildup. The valve could be cleaned and then then re-installed to see if proper operation can be...

Q: Vehicle was sputtering and lost power. Gets spark, cranks but wont start

Hello. There are few things that I recommend you have a technician inspect. In order of probability your vehicle may have a bad mass air flow sensor, a bad crank position sensor, a bad throttle position sensor, or restricted fuel...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.