Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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Long shot, but the crank/cam sensor could be being dodgy? If they've got them, I presume they have though. If there's no signal from those, the ecu won't know when to spark. Could also be the ECU.  .
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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did you check to see if the timing was out? maybe its skipped a tooth...
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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Looked at the timing and the TDC marks were lined up fine on both the cam and crank.
No cam sensor Rob, not sure on crank, think theres one of them though.
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ed
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Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by Rob H
Long shot, but the crank/cam sensor could be being dodgy? If they've got them, I presume they have though. If there's no signal from those, the ecu won't know when to spark. Could also be the ECU. .
It's got mechanical ignition 
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Kano
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Registered: 29th Aug 04
Location: Fife
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Ok... maybe miles off with this but ive been there and done the same as you..
On an 8v cavalier I had I had a misfire that I traced to being the head... stripped and rebuilt the head and it was still exactly the same..
The problem ended up being dodgy petrol from a supermarket that had water in it and had blocked an injector.. n.b. the combustion chamber was still sooty and wet as if it was fuelling fine..
Seams strange you have the miss on both cylinders however it may be worth swapping the rail and injectors for a set from a local scrappies to rule it out..
Hope this helps u...
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ed
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Registered: 10th Sep 03
User status: Offline
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It's a single point injection engine so thats an unlikely cause unfortuately 
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Gregor
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Registered: 28th Nov 03
Location: Paisley, Renfrewshire
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Did you work on it today ?
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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Inlet Gasket ok?
and the throttle body?
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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Inlet gasket was fine.
Worked on it today, but just a cleanup operation before rebuilding it.
Had a few painting bits to do as well so took opportunity whilst engine wasn't in the way...
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scottc1088
Member
Registered: 7th Mar 05
Location: Chesterfield Drives: Corsa Gsi, Cbr600
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sounds like it could be a air leak, try spraying something around it eg water, brake cleaner
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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what will the rebuild involve? 
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MC Kustoms
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Registered: 6th Aug 02
Location: Luton
User status: Offline
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sounds like mine m8 starts up then dies after 2 secs then takes 15-20 min of start stop to get it runing fine
have changed dizzy, rotor arm, sparks, HTs and ecu but still no change pops like made and a bit of black shit coming out of the exzurst done paper clip test befor ecu change and nothing
m8 of mine put fault finder on it that showed the ecu was fcuked so i changed it still no change can seem to sort it anyone help
[Edited on 22-10-2006 by speed6]
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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quote:
Originally posted by scottc1088
sounds like it could be a air leak, try spraying something around it eg water, brake cleaner
Will have to be rebuilt first though, could be a problem finding an air leak when the engine looks like this:
Robin, I have no idea mate. Rebuild as it was, rebuild with nova cam, rebuild with an XE. Depends on money, of which I'm having a distinct shortage.
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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rebuild it as it was, with new gaskets, reseat the valves, and change the fuel pump/filter and injector.
then cross your fingers.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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That's the most likely course of action.
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ed
Member
Registered: 10th Sep 03
User status: Offline
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Oooh, cleaning valves is fun! Making them all shiney in a lathe 
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Dan
Premium Member
Registered: 22nd Apr 02
Location: Gorleston on Sea, Norfolk
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o ed u uni bum  in a bloody lathe ...
just stick them back in the head, with some paste on, stick in the drill and amazing results to be had
Adult GiftsClick here to vist us
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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quote:
Originally posted by speed6
sounds like mine m8 starts up then dies after 2 secs then takes 15-20 min of start stop to get it runing fine
have changed dizzy, rotor arm, sparks, HTs and ecu but still no change pops like made and a bit of black shit coming out of the exzurst done paper clip test befor ecu change and nothing
m8 of mine put fault finder on it that showed the ecu was fcuked so i changed it still no change can seem to sort it anyone help
[Edited on 22-10-2006 by speed6]
I had this with my 1.2 8v over the last few weeks and after changing all of the parts that you mentioned it turned out to be a faulty coolent temp sensor. Once the car has warmed up it causes it to overfuel as it is still sending too much fuel to the car as it is still under the impression that it is cold. this causes the symptoms that you mentiond.
Only about a fiver from vaux and is easy to replace. Maybe worth a shot. Might be worth a try aswell ash. Although i dont think mine was having problems with not firing all of the cylinders.
[Edited on 23-10-2006 by gavin18787]
Drives supercharged Tec with torque 
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ed
Member
Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by Dan
o ed u uni bum in a bloody lathe ...
just stick them back in the head, with some paste on, stick in the drill and amazing results to be had
Last time I did it I used a drill in a vice at home and some wire wool I like making them shiney before putting them back in
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MC Kustoms
Member
Registered: 6th Aug 02
Location: Luton
User status: Offline
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quote:
Originally posted by gavin18787
quote:
Originally posted by speed6
sounds like mine m8 starts up then dies after 2 secs then takes 15-20 min of start stop to get it runing fine
have changed dizzy, rotor arm, sparks, HTs and ecu but still no change pops like made and a bit of black shit coming out of the exzurst done paper clip test befor ecu change and nothing
m8 of mine put fault finder on it that showed the ecu was fcuked so i changed it still no change can seem to sort it anyone help
[Edited on 22-10-2006 by speed6]
I had this with my 1.2 8v over the last few weeks and after changing all of the parts that you mentioned it turned out to be a faulty coolent temp sensor. Once the car has warmed up it causes it to overfuel as it is still sending too much fuel to the car as it is still under the impression that it is cold. this causes the symptoms that you mentiond.
Only about a fiver from vaux and is easy to replace. Maybe worth a shot. Might be worth a try aswell ash. Although i dont think mine was having problems with not firing all of the cylinders.
[Edited on 23-10-2006 by gavin18787]
thanx m8 i will give this ago 2moro
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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have to let us know if it works.
Drives supercharged Tec with torque
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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quote:
Originally posted by ed
quote:
Originally posted by Dan
o ed u uni bum in a bloody lathe ...
just stick them back in the head, with some paste on, stick in the drill and amazing results to be had
Last time I did it I used a drill in a vice at home and some wire wool I like making them shiney before putting them back in
This is my plan
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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port the head with a dremel. you'll gain about 1bhp
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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Done already
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MC Kustoms
Member
Registered: 6th Aug 02
Location: Luton
User status: Offline
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changed coolent temp sensor and still no change just dont want to start for 10-15 min then it will be fine
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