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[fatz21]

Hi,

In the interests of attempting to give something back to the forum I thought I would share my misfire misadventure.

Apologies if this is old news or has been covered before.

About 6 months ago my 2.2 CDX started misfiring on startup. Problem would last about 30 seconds and then all would be sweet again. Occasionally I would get a engine fault light and the code (read on an "ebay special" tech 2 handheld) pointed to a lambda sensor. While messing about trying to disconnect the lambda sensor (I am not a very skilled weekend mechanic) the fault vanished. Figured connection prob.

Mid way through the snowfest of a few weeks ago the fault returned except this time it would not return to smooth running at all. Engine would fire up, run for 5-10 seconds then die. Juggling the throttle I could just about keep it running but driving it was a nightmare.... 5-10 seconds of power, then virtually no power then power again.... so it sort of kangaroo'd until limp mode kicked in.

No codes (that I could read) so off to my fav Vaux mechanic who always bails me out when I can't find the answer on OOF!!

Turned out to be the mass air flow sensor open circuit.

Now my baby runs like clockwork again. Which is fab because I do love my 2.2 CDX estate (yes, am getting therapy for the problem!! ).

If anyone in the general vicinity of Camberley Surrey needs a good/dependable Vaux mechanic, message me for his details. Didn't want this post to read like an advert!

Regards,
john

[TheBoy]

So why didn't your cheap reader pick up the MAF fault?  MAF faults are always dead easy to spot (whether they produce a code or not - 99.9% of time they do), and an open circuit one would have stored a code  :-/

What reader was it?

[fatz21]

What reader was it?

The U480 orange handheld kind that sell on Ebay for 20 squid.... not a sausage as far as a code.
I know the U480 does work coz it's found other codes in the past.
Tis puzzling.

[TheBoy]

What reader was it?

The U480 orange handheld kind that sell on Ebay for 20 squid.... not a sausage as far as a code.
I know the U480 does work coz it's found other codes in the past.
Tis puzzling.

Can it do any form of live data? If so, get yourself some of the figures when its running well, and use as a benchmark to compare against if you get future problems

[sexydaz]

i borrowed mi mates u280 and that picked up the maf sensor p0100