Idle dropping to 500rpm, Need Help badly!!

baz_rochdale

yeah got problems myself. taking ages to load and post.

MikeS

did u ever reset the ecu

i.e unplug battery for 30 minutes

baz_rochdale

Yeah did that.

baz_rochdale

right, vacuum pipes all seem fine. but my mate (works for subaru) said even tho the air flow meter doesnt throw up the warning light they can go faulty, says he's had this problem with a few scoobys in the past. and that i should change the o2 sensors as well. (manifold . . cat) to see how i go from there. but idealy he said to change the meter or see if you can borrow one that i knows working and see whats happens.

so, now to find a z22se engine around rochdale.

I JUST LOVE MY CAR!!

MikeS

is it a vectra C ?

baz_rochdale

yeah, i'm on vectra-c forum so i'll have a looky on there.

MikeS

could well be that

what i am more concerned about is that u say it only happens when the engine is cold then it starts improve as the car warms up

by looking at your video i would say it is an air leak though as it looks to be correcting itself after it hits 500 rpm

u tried taking out the map sensor and giving it a good clean with carb cleaner, u can do the same with your air flow meter but be more gentle

baz_rochdale

it happens all the time regardless of engine temp. i see your point as a air leak would cause a dip. but just cant see one. i'm guessing as theres no idle control, the air meter and o2 sensors determine the idle control and fueling in a way.

rushy

Thats better. No mate Sky broadband. The only sensor on the Vec C in the intake system is the MAF and nothing else.

baz_rochdale

MikeS said:
could well be that

what i am more concerned about is that u say it only happens when the engine is cold then it starts improve as the car warms up

by looking at your video i would say it is an air leak though as it looks to be correcting itself after it hits 500 rpm

u tried taking out the map sensor and giving it a good clean with carb cleaner, u can do the same with your air flow meter but be more gentle

No. could do with a fresh tin (shed fairys took the old one) so i'll pick one up at the weekend and try it.

And by air flow meter i mean the sensor/meter directly before the air filter box.

MikeS

have u checked your intake hose for cracks ?

cos any air leaks after the air flow meter will cause problems

rushy

Thats the MAF mate.

MikeS

you remember the last time we had this discussion rushy

no one believed there was an air flow meter on a z22se

problem with me is that i dont usually associate z22se with Vectra C's as the yh engine took over

also check your cam breather hose for splits

rushy

The YH is turning out to be a bit of a shocker mate. It doesnt have the oil jet problem, but the chains still go, the inlet manifold fails, and the High Pressure pump is just a joke, its a case of when it goes not if.

baz_rochdale

yeah checked the lot. suppose i could have another look then i got more time but 99% sure its fine. and yeah thats the bunny Rushy. just looked on ebay for new ones and found this.

http://cgi.ebay.co.uk/Vauxhall-Air-Flow ... 2c50b44324

thats the correct one isnt it?

rushy

Thats the same as mine mate.

baz_rochdale

well i think before spending that amount i want to track down a working z22se and try their's first. dont want to part with £100+ for nothing.

MikeS

20 (12576059) (8 36 600) METER, ASSY., AIRFLOW, AIR CLEANER (NLS.- USE 55353467) C
C -31999999
-38999999 1 12576059 8 36 600 Z02
20 55353467 8 36 636 METER, ASSY., AIRFLOW, AIR CLEANER C 41000001-
C 48000001-
1 55353467 8 36 636 Z02

i can get u a genuine one with trade club for

2.2 55353467 £107.28

baz_rochdale

MikeS said:
20 (12576059) (8 36 600) METER, ASSY., AIRFLOW, AIR CLEANER (NLS.- USE 55353467) C
C -31999999
-38999999 1 12576059 8 36 600 Z02
20 55353467 8 36 636 METER, ASSY., AIRFLOW, AIR CLEANER C 41000001-
C 48000001-
1 55353467 8 36 636 Z02

i can get u a genuine one with trade club for

2.2 55353467 £107.28

Well i'll swop mine with a working one first and see if that changes anything, if so i'll give you a shout to order me one. Thanks Mike

but in the meantime you think blasting the air meter sensor with some carb cleaner? (watch me bugger it up now!) :think:

MikeS

yeh i chucked an air flow meter in a bucket of hot water with washing up liquid then used carb cleaner lol [well not me my old man] and it still worked haha

it is up to you

i cant guarantee u wont fudge it

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