my turn for help please- ecotec 2.2 loss of power & jerky acceleration

this one has me stumped as such.

as above, seeming to misfire, but no bangs, low power on acceleration, very
jerky ride.

done usual ICV,
plugs [tri-spark now fitted]
new leads [not done coil pack]
no ECU faults showing! bugger!!

sort of co-incided after changing top gasket following it blowing and oil
filling leads/spark plug area.
complete new cat/exhaust fitted at same time.
O2 sensor wires checked also

thinking down the lines of the EGR valve needs a clean or maybe that tiny
hole in the butterfly of the throttle body?

seems also to be using more fuel, but as the price has gone up so much, diff
to know if the wife is just being paranoid
or just a case of less petrol to a tenner!

mostly tesco petrol used
halfords semi synth oil.

did get overfiled by about 1ltr as the sump did show empty after gasket blew
but wasnt!

any thoughts or pointers please

 

o2 sensor not doing its thing?
heard that it can cause this.

Mike

 

yep i think that will be cleaned also if poss.
just done the EGR valve and it's engine block channels & that has inproved
thing.
my next step is going to be attacking the butterfly breather hole in the
throttle body.
that seems about the next candidate.
i'll be looking on the net tomorrow for a guide or two just to brush up on
what to do. & look for.

the biggest pig will be its a sintra and its under the dash overhang so to
speak, space is tight but i think once the airintake is out he way
it should be easy.
i'll let you know how i get on.
but the ERG certain was worth doing.
the valve was not sticking, but the channels away from it on the block were!
good dose of WD40 and a poke with its red sleeve soon cleared it through.

im slightly puzzling if i have overheating in the first 2 cylinders as the
new spark plug are showing signs of heat damage on the ceramic insulators,
but no alarming indication on the temp gauge
all is normal, but its back to pulling on acceleration now , so im getting
there.

mike

 

Long shot I know, and I dont know if you want to be bothered, but try
swapping injectors 1&2 for 3&4. I'm thinking that if theres a (very
slight)blockage then you might have 1&2 running ever so slighly lean on the
mix. A bit fancifull I know, but short of a waterway blockage or an air
bubble its all I've got.

Mike

 

Maybe if the EGR was not circulating properly to the first 2 cylinders
this would increase the temperature in these cylinders?

 

Sounds like something's up with the timing e.g. crank sensor or dizzy
cap.

 

Haha what a bunch of morons you couldn't fix a kids bike.

 

Wow the moron finally decides to change the plugs.
Does your one brain cell ever get lonely retard?

 

well i thought id try a few stupid things first.
like another set of plugs........
........bingo, got a set of NKG's from a local shop.

after a nwee bit of blowing out, shes running fine,
good accelerating even in 5th uphill without a hiccup in sight!

so i think it was just a sad trail of events that caused it
rocker gasket went
oil in cylinders
changed plugs/leads
EGR vave finally gave up at the same times
small tube from head to throttle blocked
change of spark plugs

my acid test will be if i get the fuel consumption back.

now, im going to check a certain large retailer sold me the correct
sparkplug in the first place

thanks guys

though if anyone known og a guide on the net for down the throttle etc etc
i'd like a look at it.
there are more than 1 thin pipe at the back that must be gummed up or close
to by now

mike

 

* Wow the moron finally decides to change the plugs.
* Does your one brain cell ever get lonely retard?

Obviously not first in the queue for manners, politeness or tolerance! - or
even punctuation!

Not that I'm perfect - I don't claim to be.

Everybody has to learn, maybe you'll start someday when you start to mature.

Cheerio now

Ono

 

i killfiled straitwan*er ages ago.

 

Probably best not to respond to straight talker - that way he might go away
and make a nuisance of himself in another news group.

 

Ha-ha mouthy Chris finally gets a spine and decides to reply.
What happend to you ringing my garage then Chris?
You didn't bother as you knew you would be proved wrong.
Go back and crawl under your stone coward this room is for real men with
balls.

 

Is shite talker and dogboy the same person. Pathetic. I love to kick
your ass. Is there anyway we can get rid off this annoying fool..

 

Yes he is. He doesnt even have the brains to mask his IP address. Just
ignore the trolls.