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Old 11-09-2017, 09:49 PM   #1
Benjamin.foley
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Default 1.6 k series engine wont fire

Hi all,
Im part way through the k series mini build but cant seem to get my engine to fire. The engine ran fine when it was in the donor car and ive got fuel going to the engine and the spark plugs are all working. It will turn over but just wont fire has anyone got any ideas what the issue may be. Cheers Ben
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Old 11-09-2017, 10:28 PM   #2
AGoaty
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Have you had it in bits? If yes have you had the cam belt off? This seems a common thing to get wrong.

Do you have an inertia switch fitted? I find sometimes that when the battery has been disconnected that the inertia switch will trip and just needs pressing to reset.

Check the engine with a compression test. All cylinders should be above 100psi.

How old is the fuel? Mine doesn't like supermarket fuel after about 3 months. Runs really poorly until fresh is added.

Has the ECU got it's earth connected? Strangely it will turn over without this but obviously won't run.

Good luck...
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Old 12-09-2017, 04:49 PM   #3
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Whats your situation with your immobiliser and wiring? I had a similar problem with mine, turned out the ecu wasnt getting a signal from the 5as
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Old 14-09-2017, 06:37 AM   #4
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Turn the engine over & spray easy start into inlet does it try to run then?
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Old 14-09-2017, 07:27 AM   #5
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Had similar on an SPi A series, was an immobiliser issue
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Old 14-09-2017, 02:52 PM   #6
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Had the same problems with mine, it was a bad earths that prevented the fuel pump from running correctly.

Gavin
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Old 14-09-2017, 03:00 PM   #7
Benjamin.foley
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Just had a look everything seems fine with timing and all the HT leads are in the correct order. I tried turning it over without the sparkplugs in and it whizzes round but when i turn it over with them back in it seems like its struggling. Ive made a new battery earth and ive put some new fuel in
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Old 14-09-2017, 03:01 PM   #8
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The fuel pump is running alright i can hear it working in the tank and ive pulled the fuel line off while its running to check if the fuel is coming through
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Old 14-09-2017, 03:44 PM   #9
InstantCustard
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Are you definitely getting fuel?
When you've tried to crank it with no plugs in could you see the fuel being sprayed in or are the plugs getting wet when you remove them after you've tried to start it.
I assume you've double checked the fuel lines are connected the right way with the feed and return?
It's hard to diagnose a problem on a forum, it's much easier to be there working through everything methodically, all we can do is fire ideas at you and hope it solves it.


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Originally Posted by Burnard View Post
couldnt be bothered to stretch that far to pull it out.
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Old 14-09-2017, 04:19 PM   #10
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The fuel pump should only rung for a few seconds then stop, it primes up to pressure then cuts out, it won't pump again until the pressure drops. Put a light in the fuel pump circuit so you can see when it's pumping, If you spray easy start into inlet manifold & it tries to run you know it's fuel related, if it doesn't it's likely to be spark related. Engines only need 3 things, fuel, compression & a spark
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Old 14-09-2017, 04:23 PM   #11
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Have you got your fuel feed and return lines connected up to your fuel rail the correct way?
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Old 14-09-2017, 06:36 PM   #12
Benjamin.foley
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Sigh of relief. Just want to say thank you to everyone who has helped out diagnosing problems. Found a small hole in the fuel rail which meant i was losing fuel pressure. I plugged the hole and it fired up straight away. Well chuffed thanks again everyone
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Old 14-09-2017, 09:56 PM   #13
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How can you "find a small hole" without seeing fuel all over the place???
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Old 14-09-2017, 10:42 PM   #14
Benjamin.foley
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I have no idea how i didnt see it before. There has been no fuel coming out until tonight when i went to turn it over and i saw the fuel pouring out. I dont know whether it was fractured and suddenly gone under pressure. But on the plus the engine is running and a new part is on ordee
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