Lack Of Power

[pj_andrew]

I've noticed that there is a distinct lack of acceleration on A and M roads in my 2.3 Galaxy. With 2 adults, 2 children, some luggage and the aircon on full blast (it was a hot weekend), then putting your foot down to accelerate from say 20 or 30 is a slow process.

 

For example, going round a roundabout on the A1 at 30 and then booting it to get back up to 70/80 is hard work. I find I have to rev to 5 or 6000 to get any sort of acceleration. OK, the aircon was on full blast but its pretty much the same without it on.

 

Does this sound familiar to anyone ?

[Dally]

My 2.3 feels that way at times, but on other occassions it's fine. Ireally do think I own a schizophrenic galaxy!

 

When I feel the power's lacking, I drive it really hard for 10 - 15 miles and it seems to sort it self out.

 

I wonder if it has anything to do with the self learning mode of the ECU?

[Guest Andy]

DOES IT DRIVE CRAP ALKL OF THE TIME AND HAS THE MPG GONE UP..CAT MIGHT BE GOING HOME IF SO.

:unsure: :D :D :D

[pj_andrew]

Having driven again yesterday, it feels that the acceleration is ok. Get to 30 in 2nd, boot it and it picks up ok.

 

It may be my perception of speed. After travelling at 80 for a while and then slowing to 30 and then trying to get back to 80, it just "feels" slow. But, having set off in the morning for example, the acceleration feels ok because you haven't just been travelling at speed for a long time.

 

The other possiblility of the ECU learning and adjusting sounds interesting. Does the ECU do that ?

[Guest Pete C]

"The other possiblility of the ECU learning and adjusting sounds interesting. Does the ECU do that "

 

I think it will but only after it has been disconnected from the battery for a while.

[Ivor_E_Tower]

..."for a while" could mean just a few seconds. The ECU definitely needds to "re-learn" after its power feed is interrupted, and I used to have a Rover 820 that needed the ECU re-programming (so it said in the manual) after the power was interrupted (ie after you changed the battery). Most unsatisfactory.

[Guest Pete C]

I suppose it's a chance to start from a clean sheet.Whilst we're on this subject,I used to have a cavalier 16v sri and it was possible ,with the help of a piece of wire, to connect certain pins on the diagnostic plug and interrogate the fault codes stored in the ecu.If I remember doing this made the engine management light flash in numbered sequences and these could be decoded into a fault no. which could be read off a table to give the actual fault.I used it a few times to find faulty abs sensors etc.Does anyone know of such a trick on the galaxy?