Reset ECU

wul3er · Post by **wul3er** » Wed Sep 15, 2004 7:56 pm

Does anyone know how to do this other than Unplugging the battery for 24 hours.

bstardchild · Post by **bstardchild** » Wed Sep 15, 2004 8:04 pm

wul3er wrote:Does anyone know how to do this other than Unplugging the battery for 24 hours.

Shouldn't need 24 hrs AFAIK - Vauxhall (bosch) ones reset after 20-30 mins - run like crap when you first start the car up again cos all the block learn values are reset to factory settings and it takes a while to shift em to where they should be

Why would you be wanting to re-set the ECU?

wul3er · Post by **wul3er** » Wed Sep 15, 2004 8:12 pm

I heard that by reseting it, it can make the car run bettter.

I have to do an oil change and filter change this weekend and thought it would be a good time to reset the ECU if it wasnt to hard (thats if its a good idea)

oh, and i have to change the spark plugs.

The engine hasnt really been looked after as much as what it should and coming home from work the other day it decided to lose all power and when i droped a gear and put the boot down it sounded like it was dying, This has happened a few times since. Its worrying me cos its not something that happens everytime (just now & again).
Im not very good with engines, One of my mates suggested that i replace the spark plugs and do the oil and filters.

bstardchild · Post by **bstardchild** » Wed Sep 15, 2004 10:12 pm

wul3er wrote:I heard that by reseting it, it can make the car run bettter.

Only if a fault is causing it to drift from the optimum settings

wul3er wrote:I have to do an oil change and filter change this weekend and thought it would be a good time to reset the ECU if it wasnt to hard (thats if its a good idea)

oh, and i have to change the spark plugs.

Good idea to go thro a car and cover all the bases if it's not known or clear that it's been done recently

wul3er wrote:The engine hasnt really been looked after as much as what it should and coming home from work the other day it decided to lose all power and when i droped a gear and put the boot down it sounded like it was dying, This has happened a few times since. Its worrying me cos its not something that happens everytime (just now & again).
Im not very good with engines, One of my mates suggested that i replace the spark plugs and do the oil and filters.

I'd make sure I did the fuel filter as well....

/semi hijack - I did see a bit in the MKIV Polo Haynes Manual saying it was not advisable to disconnect the ECU saying it was coded - thats got me completely foxed cos I can't see how they would be!!!!!

wul3er · Post by **wul3er** » Wed Sep 15, 2004 11:24 pm

Could you tell me were the fuel filter is, Roughly how much it is likely to cost and how easy it is to change.

If you could give me some hints and tips that would be great.

bstardchild · Post by **bstardchild** » Wed Sep 15, 2004 11:41 pm

wul3er wrote:Could you tell me were the fuel filter is, Roughly how much it is likely to cost and how easy it is to change.

If you could give me some hints and tips that would be great.

Where - in front of the tank at the back of the car (underneath)

Identification - small aluminium cylinder with fuel hose on each end

Will be one of two types

- Speed fit or Old fashioned jubbly cliped

- Price dependant on fitting but around Â£6 from local assesory shop

Takes about 10 mins to change but

- don't smoke when you do it

- get plenty of kitchen towl or rag under there with you

- Don't work under a car thats just supported by a jack - use axle stand(s)

- Don't get petrol in your eys - it really stings for ages.......

Can't think of anything else!!!

wul3er · Post by **wul3er** » Wed Sep 15, 2004 11:49 pm

Thanks very much, i think i'll change this as well, But just to be safe i'll get one of my mates to "supervise" me (lol) since i have 2 that know what they are doing and i dont. Cheers for your help. I'll let you know how i get on.

Ps what else do you think would be worth while checking/replacing.

So far i have:
*Oil Filter
*Oil
*spark plugs
*Fuel Filter

bstardchild · Post by **bstardchild** » Wed Sep 15, 2004 11:51 pm

wul3er wrote:Thanks very much, i think i'll change this as well, But just to be safe i'll get one of my mates to "supervise" me (lol) since i have 2 that know what they are doing and i dont. Cheers for your help. I'll let you know how i get on.

Ps what else do you think would be worth while checking/replacing.

So far i have:
*Oil Filter
*Oil
*spark plugs
*Fuel Filter

- Air Filter - unless you have a noise box fitted

- Dizzy and rotor unless MKV's are DIS

bout it really

Good idea to have friends to supervise/assist - learn a lot that way

wul3er · Post by **wul3er** » Wed Sep 15, 2004 11:55 pm

The air filter is a After market one. What is the dizzy and rotor. How do i know if my car has them

JWC · Post by **JWC** » Fri Sep 17, 2004 9:45 am

wul3er wrote:The air filter is a After market one. What is the dizzy and rotor. How do i know if my car has them

The distrubuter and the Rotor arm inside it. You can find it at the end of the sparkplug leads.

I don't think my MK5 has one. There is still a lump at the end of the rear camshaft (16V), but I'm almost certain that this is just a CAS and an ignition box, seems logical if you have a place to bolt it.

wul3er · Post by **wul3er** » Sat Sep 18, 2004 11:32 am

Cheers,

Unfortunatley the funds have had to go else were this week, So once again im gonna have to put it off.

JWC · Post by **JWC** » Mon Sep 20, 2004 8:28 am

Do you run on Tesco fuel at all? Mine logs occasional sporadic misfires under Tesco's fuel. Usually any problem is so sort lived, i.e. just a very slight misfire that I don't worry about it. But when I use another fuel, the problem seems to go away.

Not all fuels are equal.

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