ainsley_brader
Member
Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline
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I have been correcting a 2.0 8v corsa conversion recently.
It came to me for an alternator after the old one had knocked itself out on the chassis leg despite somebody grinding a bloody great hole in it.
Anyway engine came out, chassis welded up, proper engine mounts acquired and fitted and the engine was dropped back in. (sitting somewhat squarer and lower and nowhere near the chassis leg!)
Trouble is it now wouldnt run. It was running before but badly and took ages to start!
So onto the wiring. The wiring was interesting at best using the cavalier loom including starting and charging loom, the ecu was under the scuttle next to the washer bottle and there were loads of loose wires.
So I stripped all the loom out and wired it directly into the corsa plug in the footwell colour for colour and sited the ecu there where it should be.
At this stage I can now get the car to start but only by priming the fuel pump first. Once running the pump will run but it wont prime itself.
What tells the pump to prime? ecu, relay?
(I should add the car has a clifford alarm if it makes a difference)
One other small note rev counter. The corsa rev counter is a green wire correct?
I have no wire in the cavalier loom. I have tried connecting it to a green wire (in a black coating) that had a single plug on the end near the coil (previously unused) but that doesnt work.
FRom what i can tell by tracing the original wire it was originally connected to a plug on the coil would that be right?
Also there is a 2 pin plug on the coil. Am I correct in thinking it doesnt matter which side of the coil i plug this in?
Thanks for any help Ainsley
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chrex
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Registered: 26th Aug 07
Location: Brawdy/Wirral
User status: Offline
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is the alarm system an immobiliser too, as this could be why the fuel pump isnt coming on.
If its the ECU, i have got a couple of 2.0 8v ecu's.
The rev counter is the green wire yea...what does the coil look like? is it a round oil filled one or a block one?
My rev gauge comes off the coil negative, which is a round plug with a rubber surround.
Does depend on the coil tho!
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
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Generally the pump doesnt prime, it says it should in the manual but mine never did. as soon as the crank sensor sees the engine is turning it should bring the pump on.
As long as the pump os on while the engines running there shouldnt be a problem
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ainsley_brader
Member
Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline
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hmm now the crank sensor outer is cracking around where it goes into the block! are they the same as 16v ones or better still vectra ecotec 2.0 16v ones?
The alarm definitely immobilises the starter! not sure otherwise though but as i say pump runs when it is running!
coil is a round oil type one with king lead coming out the middle and space either side for a two pin plug!
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