Skip the auto shop - Our mechanics make house calls

Q: crank but not start

asked by on

engine suddenly died during driving all fuses, relay checked OK. fuel pump driver module replaced. tank removed and before i replace the pump i connected it directly to the battery and works. Now do i have weak pump must be replaced? Thanks for reply

My car has 100000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. When it comes to vehicles that crank but do not start, there are several tests that can be done. There are a few that need to be done first before you should progress to more complex possibilities. In regards to the fuel system, you should install an in-line fuel gauge at the engine and test the available fuel pressure. If the pressure is below specification, then you should replace the pump. If the fuel pressure tests within spec, then you will want to turn to the spark plugs. Test for spark using a spark tester. There are other ways to test for spark but this is the safest. If you do have spark, then you you need to turn your attention to certain sensors that can effect start up. If you do not have spark, then you want to look into the ignition coil and system. Typically you start by testing for spark first, but considering the point at which you are at testing for fuel may work better for you.

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

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: Coolant leak

Coolant can leak from many different places around the motor or the radiator. Many common places for leaks to happen are places where there is a pressure buildup such as radiator hoses and the water pump. Generally, when a water...

Q: When I start my van the gauge will bounce up and down

This sounds like most likely an oil pressure sending unit problem. These vans are somewhat known for this problem. The sending unit sits down near the oil filter and will cause the gauge to read intermittently when the sending unit...

Q: How does the active park assist system work?

Parallel parking is no fun, even if you’re an experienced veteran. If your car has the active park assist (APA) system, then you’ve got some extra help to make the process easier. This is an automated system that actually scans...

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...
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...