red_12v
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Registered: 14th Mar 04
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help please!
car is standard 98 corsa b 1.0 12v
runs ok below about 3500 but above that it pinks and jerks slightly and also theres no throttle response above about halfway , it actually slows down if you open the throttle any more than halfway 
i dont think i can do a paperclip test , see here...
http://www.corsasport.co.uk/board/viewthread.php?tid=165662
i tried to take a pic of the diagnostic socket on my car but it came out poor but im missing a pin by the looks of it , if you read the above post you will see what i mean.
i recently changed the coolant temp sensor and the idle speed motor because it used to idle really high for ages when cold. this is now cured though.
fuel + air filters + plugs are about 6 months old at most as well.
im thinking along the lines of the e.g.r valve is stuck open slightly maybe or the air mass sensor ?
the diagnostic light isnt on though (yet)
any advice would be helpful.
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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what about ht leads
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red_12v
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Registered: 14th Mar 04
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quote:
Originally posted by broster
what about ht leads
fast response 
its got the coil pack unit. no leads or dizzy as such. not sure , thought that a problem with the coil pack unit would cause a problem all the time maybe , like a constant misfire?
ok below 3500rpm.
[Edited on 26-09-2004 by red_12v]
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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if its misfireing under load could be the ignition.....
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red_12v
Member
Registered: 14th Mar 04
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worth a try. i might be able to borrow one to check that.
anything else worth looking at that you can think of ?
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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nope
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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Serious loss of power under load would suggest ignition problem, or maybe injectors? how many miles has it done?
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red_12v
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Registered: 14th Mar 04
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on 47k at the moment. been properly looked after as well, ie oil change halfway between services etc.
bet a new coil pack isnt cheap though from vaux.
strange one really, if you back off the throttle it picks back up again but i think its slowly getting worse over the past two weeks or so...
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red_12v
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Registered: 14th Mar 04
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shame i cant do the paper clip test to see if anything else is amiss.
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antscorsa
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Registered: 11th Aug 02
Location: london
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had the same prob and cost 400 to fix and vaux the cunts, cos of the diagnostic the part adnt hen the labour, ill try and find my recipt for the part no.
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red_12v
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Registered: 14th Mar 04
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cheers. any info more info would be good.
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Visionz
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Registered: 9th Aug 04
Location: Derby
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I dunno bout these vaux engines at all really, but generally if a car is truely pinking its the fault of the knock sensor, if a knock sensor is working properly then an engine cant pink.
(although i dont even know if these engines have knock sensors)
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red_12v
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Registered: 14th Mar 04
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yes it does have a knock sensor. but i thought that a fault with that would of brought on the diag light , well normally anyway. 
if its cheap il replace it anyway i think.
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antscorsa
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Registered: 11th Aug 02
Location: london
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sumifn like a carbon filter thats either colged or broken which stops air entering the engien casuing it to pink, sumfin like that
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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quote:
Originally posted by Visionz
I dunno bout these vaux engines at all really, but generally if a car is truely pinking its the fault of the knock sensor, if a knock sensor is working properly then an engine cant pink.
(although i dont even know if these engines have knock sensors)
If it was pinking because of a problem with the knock sensor, it would be doing it through the entire rev range surely? Also, a few early 1.0 12v's were made with RON plugs.
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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I had this on my 1.0 12v when it hit 40k.
Solution: ripped it out and binned it and put a £250 1.2 16v with 7000 miles on it in there
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CRB 553
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Registered: 5th Apr 02
Location: NE Drives: Punto GT
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had the same problem when i had my 1.0. Coming off slip roads u wud press accelerater down and it wud die had to use throttle very gradually to pick up some speed...
was mass air sensor believe it or not, picked one up from scrappy and worked fine. I had ecu light on though so i knew wot it was...
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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have u checked that ur engine management light comes on before you start the car? Just to eliminate the problem of the bulb being blown....
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antscorsa
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Registered: 11th Aug 02
Location: london
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thast it air mass sensor 70 or so quid form vaux so get one form a scrappy
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red_12v
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Registered: 14th Mar 04
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yeah, diag light functions as normal , comes on with ignition, goes out when started.
going to try a coil pack by wednesday or poss thursday evening to see if that offers any improvement at all. 
then will have to see about the knock sensor or air mass sensor if that doesnt work.
P.S , it does seem to be getting slowly worse though...
[Edited on 27-09-2004 by red_12v]
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CRB 553
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Registered: 5th Apr 02
Location: NE Drives: Punto GT
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save ur self some time and try the mass air sensor first...
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red_12v
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Registered: 14th Mar 04
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just an update and a thanks really.
fitted a second hand air mass sensor a few days ago , all is ok now!
thanks again.
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gizzum123
Member
Registered: 10th Dec 04
Location: halesowen, west midlands corsa b 1.2 8v
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yo peeps wtf is pinkin im mad petrol head and never herad that term
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Graham
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Registered: 12th Oct 03
Location: Lincoln.
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ive got the same problem on mine, unfortunatly the engine light comes on all the time when it happens, especially on motorways but vaux hooked it up to the tech2 and nothing  it didnt pick nothing up, but ill let you know what happens if they find the fault on wednesday
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Edd
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Registered: 8th Nov 04
Location: Glasgow
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the easiest way to find out if its the afm is to just disconnect it and see if performance returns.
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