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2001 WRX STI starting issues


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Apologies if this is the wrong forum area. 

 

Been having some issues with starting over the last few days- 

Has been cranking fine- but does not seem to spark/get going 

Initially I was able to flatten the accelerator and it was able to start- like clearing a flooded engine however this is no longer working 

I can still hear the fuel pump priming when turning the key, and there is a smell of fuel when cranking the engine

Potentially faulty spark plugs? Any other areas to check like fuel pump or injectors or has anyone had this issue before? 

Will try putting new plugs in today 

 

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My v7 STi wagon has been intermittently doing a similar thing, it will crank for 5-6 seconds before it actually sparks and fires. Like you said I always prime the fuel pump beforehand but it makes no difference.

 

In my case I tried experimenting with cam and crank sensors since i thought it may be a sync issue but that did not help.

 

It seems like the ecu is not sending an injection or spark signal until it has been cranking for quite a while. My car does it really intermittently (maybe once a month) so it has been difficult for me to diagnose.

 

I did wonder if I had a leaky injector that was causing it to flood when shut of and only clear after cranking for a while.

 

Sorry I don’t have an answer for you but I’m very interested to hear if you find anything.

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Leaking injector would be what i’d check for. Crank it over a bunch of times then pull the spark plugs and see if one is soaked.

 

Doesn't a failing coolant temp sensor cause this issue too? Don't see much of it these days but it used to be a fairly common suggestion after cam, crank sensors

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