really need help guys.

[matty101]

right then, started my corsa up yesterday and it started reving the tits off its self went up to 2.5 thousand revs and then gradually dropped but still no to where it usually is. so i cleaned the carb and tried it, same thing happened. tried to clean the idle control valve and ended up breaking it so got a new one for £60. tried it again still did it. thought the ecu mite be abit confused so disconnected the battery over night....and still no luck.
clean the airflow meter which looked brand new (vauxhall quoted me 220 for a new 1 ) and still the same.

and know i'm out of ideas, i've also noticed like a bit of a chain rateling sounding noise from the engine today, could this be linked.

help guys i'm all pooped out.

[matty101]

bump

[corsaboi1992]

im sorry to say but sounds like head gaskets on its way out as me m8 had the same prob and it was the oil mixed with the water and the car couldn't breath right

[matty101]

u sure?it starts ok a part from the reving and runs fine. and theres no mayo or wot not

any other ideas?

[corsaboi1992]

wot leter is urs?

[matty101]

u mean reg? w- 2000 1.2 sxi

i think the mass air flow meter might be gone. i disconneted it and it seemed alot better so think i might get a new 1

[corsaboi1992]

errm dnt buy new no point 2 dear go scrappys just in case its not it

[matty101]

yeah mate wwill do.

thanks for ya help

[corsaboi1992]

my plesure;)

[Peter707R]

Hey mine is doing the same - even worse as the weather has turned cold. Changed the MAF and the idle control valve so far. Done the disconnect the batter bit - even tried disconnecting the EGR - orange light on the dash but not sure if that's made a difference - tomorrow morning will tell. Did you manage to find the "cause" with yours?

[matty101]

nah still got the problem mate, got a egr valve coming i'm hopeing that shud do it.

try cleaning the egr valve mate or get a new one, i got one off ebay £30.

let me no how you get on

[Peter707R]

I seemed to have solved the problem with mine - a trip to the local garage could find nothing "wrong" although the EGR was running at just over 1 volt when it should have been under - so I changed it (£150 thanks - plus the £50 for the garage advice). Changed - and not solution! Was just about to get replacement ECU when i read a post that said they need to be unlocked to work on a new car so I purchased an "Op Com" engine diagnostic device (runs from a Laptop).

In short nothing obvious was showing but there is an option to "test" components - engine not running but ignition on. I went through every item I could find (from EGR, to ICV to tank vent). When I'd finished and started the engine - result! Car now starts and runs up to 1,300 rpm when cold but doesn't pulse - quickly slows down, dropping to a steady 900 when warm. When driving the car doesn't "hang on" when the the throttle is released and now drives smoothly at slow speeds.

Whilst there are comments that disconnecting the battery clears the memory after an hour or so I don't think this was happening and somewhere in the memory the settings for a throttle valve covered in sh*te was causing a problem when all cleaned out.

I'm sure a garage could purge the ECU or you could go for an "Op Com" device (on e.Bay for circa £40). Knowing then what I know now would have saved me circa £210 (£150 EGR, £40 ICV, £10 temp sender and £50 garage fees - less cost of item). Of couse this may have been very particular to my car but I suspect not.

I hope this helps

[matty101]

yes mate thats a great help i was really starting to run out of options.

you could go for an "Op Com" device (on e.Bay for circa £40).

you got a link mate....

thanks mate

[iToMo x]

My dad said its Idle Air Valve, But i've told him you got a new one and still does it.
But he is busy atm trying to sell his Volvo 850 and all i get outta of him now is "Its f**k"
Try and ask him when hes not busy pal

[matty101]

haha cheers mate appreciate it