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I have some issues with my Infiniti FX 3.7, 2009. - When…

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Hi,I have some issues with...
Hi,I have some issues with my Infiniti FX 3.7, 2009.- When driving: hesitating around 50 km/h and 90 km/h
- Hesitating to accelerate from full stop
- Sometimes, when slowing down, engine stops
- One time tried to start for an hour, no succes. After waiting 10 minutes, started like nothing was wrongMy guess is a problem with the crankshaft Position Sensor?Thanks!
Submitted: 6 months ago.Category: UK Car
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Answered in 10 hours by:
12/30/2017
UK Auto Mechanic: Eric, Automotive Repair Shop Manager replied 6 months ago
Eric
Eric, Automotive Repair Shop Manager
Category: UK Car
Satisfied Customers: 34,922
Experience: Automotive Repair Shop Manager, Technician/JA Mentor
Verified

HI,

I am sorry that you have not been helped yet. I just came online and saw your question

2 common causes for this are the crankshaft position sensor or the fuel pump overheating and shutting down.

Unfortunately there is no way to test either when it is cranking and running. You will need to carry a can of starting fluid with you and the next time it stalls and doesnt start back up immediately, spray some starting fluid into the throttle body and try to start. If it starts and runs for a few seconds, then it is the fuel pump as it is getting spark which means the crank sensor is sending signal.

If it doesnt start, then it is the crank sensor

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Customer reply replied 6 months ago
Don’ think there’s any spark. The morning the car didn’t start, I tried for more than 30 minutes. Not even an attempt to start. The starter cranked the engine, no succes. 30 minutes later I tried again and engine starts like nothing happened, but lot of smoke en petrol-smell, so there was a lot of petrol in the cylinders.Yesterday, when slowing down for a traffic jam, the engine stopped running. Just put gear in N ane start again, no problem.Also high fuel consumption, so all signs point to the cranksensor for me
UK Auto Mechanic: Eric, Automotive Repair Shop Manager replied 6 months ago

Hi,

If you are positive it there is no spark, then replace the crank sensor

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UK Auto Mechanic: Eric, Automotive Repair Shop Manager replied 6 months ago

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