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Author C20LET misfiring
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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   28th Apr 10 at 11:29   View User's Profile U2U Member Reply With Quote
im having some trouble with my engine, on full throttle the car jerks and jumps around,

i have changed

sparks gapped to 0.6-0.7
leads
dizzy and arm
coil
red injectors
fuel pump
fuel filter
adjustable fuel reg
acutuator
2 ECU's (phase 2 and 3) - both working

im getting a good burn on all cylinders but as soon as it hits about 3000rpm it jumps and jerks.

what you recon, could it be coolant sensor, throttle position sensor

jumps and jerks at the same point on both ecu's im lost now

thanks
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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28th Apr 10 at 12:05   View User's Profile U2U Member Reply With Quote
no light come on?
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
User status: Offline
28th Apr 10 at 12:13   View User's Profile U2U Member Reply With Quote
i dont know if the loom is connected to the eml light so i dont know tbf
moka
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Registered: 11th Mar 06
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28th Apr 10 at 13:04   View User's Profile U2U Member Reply With Quote
Having the same issue with mine at the moment. Althou i have a x14xe

I think mine is either injectors or a leak somewhere... Injectors are ticking really loud at the mo aswell.
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 13:12   View User's Profile U2U Member Reply With Quote
i think it may be the coolant temp sensor but i will change that tonight, i have no leak and larger injectors so im lost now
moka
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Registered: 11th Mar 06
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28th Apr 10 at 14:27   View User's Profile U2U Member Reply With Quote
i changed mine, no difference.
Olsrey
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Registered: 13th Jan 07
Location: Bradford   Drives: LET Vectra B
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28th Apr 10 at 14:29   View User's Profile U2U Member Reply With Quote
Is it fueling correctly? Did you get the fuel pressure set-up on some rollers or using a wideband?
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 14:50   View User's Profile U2U Member Reply With Quote
no not yet, fueling is good as its not overfueling on idle or start up, fuel pressure is set at 3 bar as advised by migweb
Olsrey
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Registered: 13th Jan 07
Location: Bradford   Drives: LET Vectra B
User status: Offline
28th Apr 10 at 14:58   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Robo C20Let
no not yet, fueling is good as its not overfueling on idle or start up, fuel pressure is set at 3 bar as advised by migweb
Advised isn't really the best way to set fueling up. Set it on some rollers to check the fueling first.
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 15:01   View User's Profile U2U Member Reply With Quote
i have tried various fuel pressures with both phase 2 and 3 and no matter what pressure it happens about 3000rpm
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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28th Apr 10 at 16:05   View User's Profile U2U Member Reply With Quote
i would make sure the ecu light is wired up before you do anything else.
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 16:13   View User's Profile U2U Member Reply With Quote
it is wired up, when it jerks the eml stays off
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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28th Apr 10 at 16:16   View User's Profile U2U Member Reply With Quote
fault code it any way
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 16:53   View User's Profile U2U Member Reply With Quote
i cant find the plug to do the paper clip test
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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28th Apr 10 at 17:03   View User's Profile U2U Member Reply With Quote
if its wired up properly its in the fuse box
SportBoy
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Registered: 5th Oct 01
Location: Retford, Nottinghamshire
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28th Apr 10 at 17:32   View User's Profile U2U Member Reply With Quote
pipes on the right way round on the amal valve?
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 17:49   View User's Profile U2U Member Reply With Quote
cut out the amal valve but left the plug in,
i tried that one in the fuse box no good unless im doing it wrong
Hodgy
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Registered: 29th Dec 09
Location: Felling, Tyne and Wear
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28th Apr 10 at 18:12   View User's Profile U2U Member Reply With Quote
crank shaft sensor ? did that on my 106 gti once it hit 300rpm that was it went wild lol

try the crank shaft sensor sounds to me as if its that and its the only thing you haven't said

[Edited on 28-04-2010 by Hodgy]
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 18:31   View User's Profile U2U Member Reply With Quote
it starts first time so i dont think it would be crank sensor, on light throttle it revs past that to around 5000rpm but on full throttle its 3000rpm
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
28th Apr 10 at 18:44   View User's Profile U2U Member Reply With Quote
you need to figure out how its wired up and get it working. as if its wired up correctly then it will make the light flash by paper clip in fuse box bit.
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 19:17   View User's Profile U2U Member Reply With Quote
i will have a look tomoz but its a c20let in a corsa b so probs wont be able to
Olsrey
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Registered: 13th Jan 07
Location: Bradford   Drives: LET Vectra B
User status: Offline
28th Apr 10 at 19:20   View User's Profile U2U Member Reply With Quote
I could flash codes on my c20let Corsa B. So you will be able to.
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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28th Apr 10 at 19:24   View User's Profile U2U Member Reply With Quote
yeah can flash codes no drama if wired correct
Robo C20Let
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Registered: 22nd Feb 10
Location: Somewhere inside your mom !!!
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28th Apr 10 at 19:28   View User's Profile U2U Member Reply With Quote
i will have a look tomoz, how do u do the paperclip test then
Olsrey
Member
Registered: 13th Jan 07
Location: Bradford   Drives: LET Vectra B
User status: Offline
28th Apr 10 at 19:29   View User's Profile U2U Member Reply With Quote
http://www.topbuzz.co.uk/info/fault_codes/fault_codes.htm

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