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[simon allen]

Hi guys,
Sorry to keep harping on about this, but I really am loosing faith in my otherwise good miggy.

Sypmtoms:
Car was down on power and averaging 18.3mpg. EML came on intermittantly when warm but a re-start used to turn it out and "normal" running was resumed.
I paperclipped it to find the intermittan eml fault and it came back with 0340. Cam position sensor curcuit.
Bought a new one, and fitted it to find that the one fitted to my car was the upgraded type and the one I bought was the old square type.

Refitted the "faulty" cps - but eml now constantly on and engine runs on 3 under load. Paperclip still only reveals 0340

Found a plug for the new cps, and fitted that soldered up and heat shrunk all nice. Still the eml is on and although the misfire has gone, the code is still there and rev limit still 4600rpm and now a SEVERE lack of power. Safe mode?

The symptoms are exactly the same whether the cps is plugged in or not - so I continuity tested the wires to te ecu - all fine. No continuity to earth on any of them either.
Am stuck now. the only other thing I can work out would be the ecu? is a vectra manual ecu the same as my auto omega one? plenty of vectras in the scrap yard but no omega.

failing that, is the gearbox controlled by the same ecu as the engine? cos I can se another nutty engine conversion coming 

[tunnie]

buy the right sensor in the first place, it may not just be the connection thats different....

[simon allen]

It is the right sensor.....

it is as was fitted to the vehicle originally... my car was fitted with an upgraded one, as part of a kit which had the sensor, and a length of wire with it.
Both the original sensor and the new one read exactly the same on the resistance, and at the same terminals. the new plug was taken from an omega, all wire colours matched exactly the same on both the plug that was fitted, and the plug that is fitted now. All I have done is fit a sensor that was fitted from the factory...

[Welung666]

Where are you Simon?

[tunnie]

Bought a new one, and fitted it to find that the one fitted to my car was the upgraded type and the one I bought was the old square type.

Not sure what you mean by 'upgraded' what exactly is there to upgrade in a cam sensor?  :-/

Refitted the "faulty" cps - but eml now constantly on and engine runs on 3 under load. Paperclip still only reveals 0340

Old one still naggered then

Found a plug for the new cps, and fitted that soldered up and heat shrunk all nice. Still the eml is on and although the misfire has gone, the code is still there and rev limit still 4600rpm and now a SEVERE lack of power. Safe mode?

So you just replaced plug? - Well its clearing causing issues here....

The symptoms are exactly the same

So purchase the correct cam sensor, make sure its genuine, not pattern. Plug it in and go.

All your issues are comming from your bodged sensor

[simon allen]

welung - i'm in telford mate 

tunnie - the new sensor was bought from my vauxhall main stealer... it is not a pattern part nor is it "bodged". there are to versions of this sensor. the original one, and a later one whis comes with a modified connector and section of loom. this is because the original connectors allowed water ingress into the sensor causing premature failure.
when i went to the dealed they asked me if mine was the standard one or the modified one. I had no reason to beleive mine was modified but was aparently wrong. it was the new type connector which has been soldered on and will not fit an old type sensor. All i have done is re-fit an original plug.

which bit of that is a bodge?

all the wires continuity test fine, all are shielded and none are shorting to earth. both sensors conform to autodata's resistances. the only test i havent done is with an oscilloscope as I'm not fortunate enough to have one 

[Kevin Wood]

Running on 3 sounds like an ignition problem to me. Is it worth going back to basics and checking plugs, leads, coil pack, etc?

What engine do you have?

Kevin

[simon allen]

it's the x20xev ecotec engine mate. it seems to have stopped the misfire now, just really poor performance.
am replacing the timing belt today so may as well stretch it to the plugs and leads etc.

anyone want to buy an omega?? 

[Welung666]

welung - i'm in telford mate

tunnie - the new sensor was bought from my vauxhall main stealer... it is not a pattern part nor is it "bodged". there are to versions of this sensor. the original one, and a later one whis comes with a modified connector and section of loom. this is because the original connectors allowed water ingress into the sensor causing premature failure.
when i went to the dealed they asked me if mine was the standard one or the modified one. I had no reason to beleive mine was modified but was aparently wrong. it was the new type connector which has been soldered on and will not fit an old type sensor. All i have done is re-fit an original plug.

which bit of that is a bodge?

all the wires continuity test fine, all are shielded and none are shorting to earth. both sensors conform to autodata's resistances. the only test i havent done is with an oscilloscope as I'm not fortunate enough to have one 

Are you free next Tuesday? You could pop down to me (near Merry Hill, Dudley) as I'm doing another members cars and could roll a glass eye over it for you

[simon allen]

many thanks for the offer mate I'm at work during the day unfortunately, but could come down after 4?
That is unless I can get it sorted before hand (hoping I can)
Just replaced the timing belt - the only one was damaged and slightly slack so I was optimistic....

No such joy though
Thanks for your help mate

[Welung666]

many thanks for the offer mate I'm at work during the day unfortunately, but could come down after 4?
That is unless I can get it sorted before hand (hoping I can)
Just replaced the timing belt - the only one was damaged and slightly slack so I was optimistic....

No such joy though
Thanks for your help mate

That'd be OK as I'm not in work till 9pm Tues

[simon allen]

SORTED IT  [smiley=2vrolijk_08.gif]

tested the resistance across the three wires for the cps to the ecu - the one to pin 32 was reading a significantly higher resistance than the other two, so I ran a new wire to the ecu and bam! job's a goodun!

Welung - thanks again for your offer mate, but you're off the hook this time 

[Welung666]

No worries Matey You know where I am if you need me in the future