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Old 20-11-2009, 11:11 AM
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kosman
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Default cosworth wiring gurus in here...

right here we go again,for the past 2months my car has just been cutting out randomly,i was just driving down the road last night and it cut out at about 30mph in 3rd gear,changed down gears and let clutch out to try and jump it while it was still rolling but it wouldnt start.

pulled over got bonnet up and oldskoolfords and kidsrs off here started trying to see what the problem was,they wiggled a few wires and it fired up and ran perfectly all night,it has done this 3 or 4 times now,and last time it did it my mate wiggled and checked alternator wires and a few others and it started and ran perfect all day.

when the car does cut out and i try to start it it'll turn over no problem but it just wont start.

ive replaced the crank sensor,ignition module,alternator and coil,and im going to get a full sensor kit put on it eventually,but has anyone else got any ideas what it could be or how to test the wires?
Old 20-11-2009, 11:46 AM
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grcossie
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Here is some good information.
http://www.siipicossu.com/manuaaleja...sis%20Info.pdf
Old 20-11-2009, 01:53 PM
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kosman
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nice one dude,anymore ideas anyone?
Old 20-11-2009, 02:22 PM
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cozmeister
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Crank Position sensor connector a bit bandy?

King lead not quite secure on the dizzy cap?
Old 20-11-2009, 03:07 PM
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bad earthing maybe?
Old 20-11-2009, 03:41 PM
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kosman
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Originally Posted by cozmeister
Crank Position sensor connector a bit bandy?

King lead not quite secure on the dizzy cap?
ill check them
Old 20-11-2009, 03:42 PM
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kosman
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Originally Posted by tejy
bad earthing maybe?
ill give that a try aswell

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Old 20-11-2009, 03:50 PM
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BigErn
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Crank sensor, phase sensor, coolant temp sensor and clean earths up. They would be my first things to do and dont cost much.

Speak to Mcrash, he may give you sympathy and other things to check. His has been doin it for aaaaaaaaaaaages now too.
Old 20-11-2009, 04:00 PM
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Had about the same problem, cts wiring was bad
Old 20-11-2009, 04:36 PM
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rog
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When it cuts out is it a total loss of power with no lights on the dash etc???
Old 20-11-2009, 05:06 PM
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is this any help?
if it's too hard to make out, i can e mail the file, i have a complete workshop manual with all wiring if it helps
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Old 20-11-2009, 05:18 PM
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tabetha
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Next time it does it, BEFORE wiggling wires, see if it has a spark, as this will at least count some things out.
NO point wiggling loads of wires then having another try, as doesn't tell you which one was guilty.
The LOOM side of the cps is a fave problem, but these more often than not cause misfires etc first, but whilst the car is running pull on the wires, twist them etc, even a slight murmur from the engine could put you on the right track.
tabetha
Old 20-11-2009, 07:55 PM
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Originally Posted by BigErn
Crank sensor, phase sensor, coolant temp sensor and clean earths up. They would be my first things to do and dont cost much.

Speak to Mcrash, he may give you sympathy and other things to check. His has been doin it for aaaaaaaaaaaages now too.
will do me man

Originally Posted by MARCOSWORTH
Had about the same problem, cts wiring was bad
cts?

Originally Posted by rog
When it cuts out is it a total loss of power with no lights on the dash etc???
no just the engine cuts out,the lights etc all stay on

Originally Posted by Gadget
is this any help?
if it's too hard to make out, i can e mail the file, i have a complete workshop manual with all wiring if it helps
i can see that fine pal,cheers

Originally Posted by tabetha
Next time it does it, BEFORE wiggling wires, see if it has a spark, as this will at least count some things out.
NO point wiggling loads of wires then having another try, as doesn't tell you which one was guilty.
The LOOM side of the cps is a fave problem, but these more often than not cause misfires etc first, but whilst the car is running pull on the wires, twist them etc, even a slight murmur from the engine could put you on the right track.
tabetha
just before it stalled it had 2hiccups when i started accerlating in 3rd gear,it didnt misfire,just hesitated
Old 21-11-2009, 05:08 AM
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Coolant Temp Sensor

Do you run a SECS monitor???
Old 21-11-2009, 06:19 AM
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boothy
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Have you tried the flange sensor behind the block
Old 21-11-2009, 07:38 AM
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how olds your engine loom???

You might be better off in long run cutting your losses and replacing the loom with a ryan loom or similar.
Old 21-11-2009, 10:47 AM
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tabetha
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With it also having hiccups, I would defo be looking at the connector on the loom side of the cps.
The connectors are around Ł3, I have loads if you need one/any.
The problem is that when they start making intermittant contact it causes micro arcing making the connection even worse, you can try with a pin squeezing the female grip side together a bit tighter, and put a slight bend in the pin side.
tabetha
Old 21-11-2009, 06:43 PM
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Originally Posted by MARCOSWORTH
Coolant Temp Sensor

Do you run a SECS monitor???
nice one no not got secs montior.

Originally Posted by boothy
Have you tried the flange sensor behind the block
not tryed owt yet kid just parked it up again

Originally Posted by warrenpenalver
how olds your engine loom???

You might be better off in long run cutting your losses and replacing the loom with a ryan loom or similar.
original one in the car,this is the first problem ive had with it so far wiring wise.

Originally Posted by tabetha
With it also having hiccups, I would defo be looking at the connector on the loom side of the cps.
The connectors are around Ł3, I have loads if you need one/any.
The problem is that when they start making intermittant contact it causes micro arcing making the connection even worse, you can try with a pin squeezing the female grip side together a bit tighter, and put a slight bend in the pin side.
tabetha
nice one pal ill check that because it had a new cps a while ago and paul rs told me to check that aswell but i never did.

ill update when ive checked it
Old 07-10-2021, 10:15 AM
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sierra1off
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Hi Mate.
What was the cause of your intermittent cutting out .
Ta
alan
Originally Posted by kosman
right here we go again,for the past 2months my car has just been cutting out randomly,i was just driving down the road last night and it cut out at about 30mph in 3rd gear,changed down gears and let clutch out to try and jump it while it was still rolling but it wouldnt start.

pulled over got bonnet up and oldskoolfords and kidsrs off here started trying to see what the problem was,they wiggled a few wires and it fired up and ran perfectly all night,it has done this 3 or 4 times now,and last time it did it my mate wiggled and checked alternator wires and a few others and it started and ran perfect all day.

when the car does cut out and i try to start it it'll turn over no problem but it just wont start.

ive replaced the crank sensor,ignition module,alternator and coil,and im going to get a full sensor kit put on it eventually,but has anyone else got any ideas what it could be or how to test the wires?
Old 10-10-2021, 02:56 PM
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sierra1off, 2 main reasons for intermittent cut out on a Saff Cosworth are either bad earthing or fault somewhere in the old original wiring loom.
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Old 10-10-2021, 06:24 PM
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sierra1off
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Cheers for reply Cossynut2, was interested in his specific problem as its same as mine, i suppose it does not cost anything to clean earths but where do you start in locating an intermittent fault in the wires within the loom ?
Old 11-10-2021, 07:42 AM
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Originally Posted by sierra1off
Cheers for reply Cossynut2, was interested in his specific problem as its same as mine, i suppose it does not cost anything to clean earths but where do you start in locating an intermittent fault in the wires within the loom ?
Some years back i had an intermittent fault, as you were driving there would be a sudden complete loss of electrical power, the rev counter would go back to zero and then it would fix itself only to do the same thing again a few minutes later. After checking everything/ replacing all sensors etc it still did'nt fix it and so in the end I had a new engine, fans and fuel pump looms put in. Instant fix with no more problems!! What you have to remember is that the original Ford loom is probably 30+ years old. You can also buy a complete new set of all the chassis earthing cables which eliminates another potential problem area.
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Old 11-10-2021, 07:37 PM
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Originally Posted by cossynut2
Some years back i had an intermittent fault, as you were driving there would be a sudden complete loss of electrical power, the rev counter would go back to zero and then it would fix itself only to do the same thing again a few minutes later. After checking everything/ replacing all sensors etc it still did'nt fix it and so in the end I had a new engine, fans and fuel pump looms put in. Instant fix with no more problems!! What you have to remember is that the original Ford loom is probably 30+ years old. You can also buy a complete new set of all the chassis earthing cables which eliminates another potential problem area.
Who does the chasis farthing cables mate I'm just restoring my 3dr will be getting new engine bay loom they sound as must aswell
Old 11-10-2021, 09:15 PM
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Adam-M
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Originally Posted by smiley
Who does the chasis farthing cables mate I'm just restoring my 3dr will be getting new engine bay loom they sound as must aswell
https://www.ebay.co.uk/itm/Sierra-Sa...-127635-2958-0

Thats where i got mine mate, then again if it’s going in for a new loom and ecu ect then they might make you an earth kit at the same time.
Old 12-10-2021, 09:57 AM
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Originally Posted by smiley
Who does the chasis farthing cables mate I'm just restoring my 3dr will be getting new engine bay loom they sound as must aswell
auto dynamix tel 01626362692 Ł39.99 They specialise in new looms etc. Spoke to them this morning and they said the kit should fit both the Saff Coss and the 3 door Coss.
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Old 12-10-2021, 04:02 PM
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Thanks mate will be getting the bay loom from them so that makes it easy 👍
Old 12-10-2021, 04:58 PM
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Originally Posted by smiley
Thanks mate will be getting the bay loom from them so that makes it easy 👍
For the extra that it may cost and for peace of mind I would get them to include the fuel pump and fans part of the loom as well. With that done and the new earthing kit everything should be spot on.
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