CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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the loom connector? Seems fine.
Already replaced the following:
ECU
Coil
Ignition Amplifier
HTs
Sparks
Dizzy
Dizzy Cap
Rotor arm
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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Check the plug to the dizzy itself.
I've had similar probllems with these engines, due to a dodgy plug.
Wiggle it, and it will sometimes work fine,lol.
Are you 100% sure the replacement dizzy does work?
[Edited on 19-11-2006 by Vaux Lad]
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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The car it came off was running fine. A new one is 187 quid, so not paying that much.
Tried three different coil leads now, all the same.
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ed
Member
Registered: 10th Sep 03
User status: Offline
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Is the head earthed properly?
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ed
Member
Registered: 10th Sep 03
User status: Offline
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See if you are getting 12v between the head and the + on the batt...
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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I will try that now Ed...
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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12.6v from + to head.
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ed
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Registered: 10th Sep 03
User status: Offline
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Balls.
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
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what car did the replacement ecu come from? do you still have the part number & s/n from the old ecu to hand to compare to the new?
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ed
Member
Registered: 10th Sep 03
User status: Offline
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Try plugging a spark plug directly into the coil and earthing it off to test that? Wear thick leather gloves if you do that though. HT shocks are fun because they are so powerfull you can't actually let go of they key to stop the car cranking 
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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Adam D sold me it, was from an early 8v with dizzy like mine.
Plugged my old ECU in again now though to see what fault codes it had stored, just number 34.
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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quote:
Originally posted by ed
Try plugging a spark plug directly into the coil and earthing it off to test that? Wear thick leather gloves if you do that though. HT shocks are fun because they are so powerfull you can't actually let go of they key to stop the car cranking
you should try pulling the lead off the dizzy while the engine is running - now THAT is fun
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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Is the new ecu definently the same version?
For distributor.
Some later c12nz's were DISpak and had a different ecu.
Edit-I posted too slow,lol.
[Edited on 19-11-2006 by Vaux Lad]
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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quote:
Originally posted by Vaux Lad
Is the new ecu definently the same version?
For distributor.
Some later c12nz's were DISpak and had a different ecu.
exactly what im thinking... plus it wont throw an error up either if its put on the wrong engine...
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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quote:
Originally posted by ed
Try plugging a spark plug directly into the coil and earthing it off to test that? Wear thick leather gloves if you do that though. HT shocks are fun because they are so powerfull you can't actually let go of they key to stop the car cranking
That thought occurred to me, will I not blow something up though? Like me and my car?
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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no
earth the plug just like you would anything else, then crank the engine & observe
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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ok, back in a mo.
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
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oh and while your cranking the engine to try get spark, may i recommend you remove the relay for the fuel pump so you dont flood the engine with fuel during all this as it will just cause problems
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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Still sounds like a distributor problem to me, classic hall sensor problem.
Perhaps the loom to the dizzy got damaged when you removed the head etc...
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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Right, just plugged in number 1 HT with a spark directly to the coil and put it near the block.
Same thing, turn to III, small weak spark, then nothing.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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quote:
Originally posted by Vaux Lad
Still sounds like a distributor problem to me, classic hall sensor problem.
Perhaps the loom to the dizzy got damaged when you removed the head etc...
How can you test a dizzy/hall sensor?
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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it should throw up code 92 if its the hall effect sensor tho surely??
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ed
Member
Registered: 10th Sep 03
User status: Offline
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Right, so we have a working ECU, working coil but no spark... It must be a faulty sensor...
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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PaulW
Thats if the ecu detects its faulty tho/
If the ecu receives no hall sensor signal(due to a knackered hallsensor/dizzy plug) it wont know the engine is rotating, so wont send a spark, and wont store a code.
[Edited on 19-11-2006 by Vaux Lad]
[Edited on 19-11-2006 by Vaux Lad]
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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Sorry guys, got my numbers mixed up.
When you turn the key to II on the ignition, thats when you get a spark. Turn it to III, it cranks over, no more spark.
Just had the dizzy cap off, when you turn the key to II, you get a big spark across the dizzy to HT 1.
I'm really puzzled.
[Edited on 19-11-2006 by CorsAsh]
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