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sudden cut out on cosworth

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Old Apr 3, 2015 | 10:09 PM
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Cool sudden cut out on cosworth

just looking for any ideas on why my cossie cut out while drivin, failure to re sart on toe, left till nxt day and restartd without a problem ,thought mayb fuel pump, but no obvious reason , cheers
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Old Apr 3, 2015 | 10:43 PM
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Hard to diagnose when it's not actually doing it. Check all your electrical connections and earth points around the car for a start and if u can't find anything have someone follow u untill it does it again and then it'll be easier to find the problem and diagnose it when it's actually got the fault. I would definitely check the fuel pump wiring as its common fault on Cossies if it's a Sierra

Last edited by gcfcos; Apr 3, 2015 at 10:45 PM.
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Old Apr 4, 2015 | 04:35 AM
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Check the gap in the phase sensor mate.
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Old Apr 4, 2015 | 07:17 AM
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When i bought my saff. I could be driving along then it would cut out. The engine would turn over but wouldnt fire. I could tow the car back home leave it for a while then it would run again.

It turned out to be a fuel filter which was blocked. My saff came with a fuel service history but the fuel filter had the date june 1991 on it lol.
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Old Apr 4, 2015 | 07:39 AM
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Would check the crank sensor, too.
After so many years I would change most of the engine sensors.
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Old Apr 4, 2015 | 12:27 PM
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Originally Posted by Cossiemainful
Would check the crank sensor, too. After so many years I would change most of the engine sensors.
Yeah good shout that, I bought a complete engine sensor kit from msd I think it was and changed them all at the same time. Saves loadsa different breakdowns!
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Old Apr 4, 2015 | 12:40 PM
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Originally Posted by Cossiemainful
Would check the crank sensor, too.
After so many years I would change most of the engine sensors.
And if its a 4x4 cossie as the loom blocks on the bulkhead and short the crank sensor out its usually the middle block
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Old Apr 4, 2015 | 01:02 PM
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Originally Posted by Jay,
And if its a 4x4 cossie as the loom blocks on the bulkhead and short the crank sensor out its usually the middle block
wasn't there a thing going around saying its best to hard wire and solder them plug wires together to get rid of problems? Something I remember reading somewhere
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Old Apr 4, 2015 | 01:26 PM
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I had this too and it turned out to be a loose connection on the fuel pump relay, hence why the problem was intermittent.
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Old Apr 4, 2015 | 03:36 PM
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Originally Posted by kevza18
just looking for any ideas on why my cossie cut out while drivin, failure to re sart on toe, left till nxt day and restartd without a problem ,thought mayb fuel pump, but no obvious reason , cheers
Done it again today so I'll need to chk pump, thanks a lot to all for replys
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Old Apr 4, 2015 | 04:08 PM
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Originally Posted by gcfcos
wasn't there a thing going around saying its best to hard wire and solder them plug wires together to get rid of problems? Something I remember reading somewhere
Yes mate its very common causes this is and the rev counter jump can cause missfire on boost ! in short that looms a twat
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Old Apr 4, 2015 | 06:01 PM
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Originally Posted by Jay,
Yes mate its very common causes this is and the rev counter jump can cause missfire on boost ! in short that looms a twat
lost count of how many i have done inc escorts lol
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Old Apr 4, 2015 | 06:21 PM
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Originally Posted by Jay,
Yes mate its very common causes this is and the rev counter jump can cause missfire on boost ! in short that looms a twat
Yeah there fookin shite, I may have to do mine at some point as I get random problems, though my fusebox ain't up to much either :-(
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Old Apr 4, 2015 | 06:37 PM
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Dont envy you hated doing mine lol
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Old Apr 5, 2015 | 10:51 AM
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I had this problem as well. Turned out to be a dodgy connector for the fuel pump that sits behind the number plate surround, same one that does the rear numberplate lights iirc. Took aaaaaaggggges to find lol.

I also removed the bulkhead loom plugs - If you are doing it, join on wire at a time - Don't be a hero and chop the entire plug off or you'll be there for ages trying to figure things out

In the end I replaced both the engine and fuel pump looms for peace of mind!

Last edited by Paul_RS; Apr 5, 2015 at 10:52 AM.
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Old Apr 5, 2015 | 11:39 AM
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Originally Posted by Paul_RS

Don't be a hero and chop the entire plug off or you'll be there for ages trying to figure things out
I bet your glad you didnt do that hey Paul
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Old Apr 6, 2015 | 12:47 PM
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Originally Posted by kevza18
just looking for any ideas on why my cossie cut out while drivin, failure to re sart on toe, left till nxt day and restartd without a problem ,thought mayb fuel pump, but no obvious reason , cheers
Just wee update wiring to fuel pump was faulty , so thanks to all for replys cheerz
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Old Apr 6, 2015 | 02:04 PM
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Glad you found it.
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Old Apr 6, 2015 | 03:34 PM
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Great stuff
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Old Apr 6, 2015 | 08:34 PM
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Good news
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