Hi all i have a 95 turbo 2000 impreza and in the last few weeks there has been a problem with the car it splutters and back fire's on pull away and on the power it couths and splutters to.

Now i have changed lambda,3 coil parks because all 3 of them was broken,i changed maf sensor to and i am still getting this problem i am going out of my mind trying to fix it but just cant find the sourse of it :-(.

Mods on car are

Front mount intercooler
Gizzmo boost controller
Full decat systerm
Up rated fuel rails and fuel pump
Turbo timer
Vf turbo not sure what number it was sorrr
Fuel reg
K&n air filter

Think thats about it on the mods.

So if any one could help with my problem please let me know thanks.

Regards alex.

 

Has your car been mapped?

 

Nope has not been mapped yet that was next on the list.

 

Theres your problem.....

Front mount intercooler
Full decat systerm
Up rated fuel rails and fuel pump
Fuel reg
K&n air filter

........no mapp with these mods will make your car run very poor

 

Would it just go like that then? because it was running perfect befor with all them mods and then one day just started doing it.

 

To start with your air/fuel ratio will be all over the gaff

If i were you get it mapped asap and drive off boost or dont drive it till you get it mapped. Last thing you want is the engine to go.

.....or return it to standard, reset your ecu and put the mods back on before you get it mapped.

 

If you want check your ECU Error codes.

Here a link to help

http://www.jollygreenmonster.com/error_codes.asp.htm

 

I had the fuel all set up on the dyno few months ago with a z4 eco put in so a/f is all ok.
Yh you are rite i need to get it mapped asap would you know a good place to take it asap?

 

Thanks for the link that website looks like it will come in very handy.

Cheers :-)

 

The best way to get the fuel and everything else set up is for the car to be mapped. The Ecu controls fuel, boost ect ect

You say you have a turbo 2000, but z4 ecu's are off import cars. Do you have a 2000 or WRX?

 

Ok i will try to book one up for next week.
When i was upgrading all the mods on the car i was told to put a z4 ecu on it so it would handle the power beta but yh its a turbo 2000.

 

I didnt think you could put import ecu's on uk cars. If so this could/has caused another problem.

Z4 ecu's are not mappable so you will need an ESL daughter board or an after market ecu (Simtek)

Contact Simon (jolly Green Monster) one of the best mappers around. Info and prices on his website

http://www.jollygreenmonster.com/classic.html

 

Ohh ok that dont sound good i will put my old one back on then.
Thanks for the info ill contact him asap to arrange something :-).

 

No probs, hope you get it sorted

 

Montex: you've not changed the dumpvalve at all then?

 

I would also put in a new set of plugs. That might be the cause of your sudden problem, particularly if you've had problems with coil packs. If your plugs wern't firing properly then it wont take long for them to fail. Id suggest NGK7's

 

I think he has bigger issues then just plugs, as mentioned Z4 ecu on a uk turbo, VF turbo when a Z4 is expecting a TD05 etc etc.

 

Yh i have got a blits dumpvalve on it mata

 

I have just got some ngk pfr7b plugs and will be fitting them today fingers crossed its that.

 

Thats right, I think he's realised he needs it mapping correctly. However for it to suddenly run bad then something has stopped working. Hopefully just plugs!

Make sure you get it mapped as soon as possible as like has been said you are running the risk of blowing it up!

 

hi people ok today i changed the plugs and all is well the car run's perfect apart from when im on 1bar boost i put my toe down and it dont like it that much but you guys said prob down to the mapping rite?

 

Thays good to hear. Your plugs failing is a sure sign that your mixture isnt right! If you dont get it mapped properly the least that will happen is you'll destroy your new plugs, at worst you'll melt your engine!

 

yh and melting my engine is not what i wont this is all ready my 3rd engine in this car. booking mapping monday with out fell.

 

Back to a recirc type asap, please. Then report back....

 

Are recirc beta than dump vales then?

 

You'll find there's always a weekly debate regarding dump valves

Most members love vta dumpers lol

 

But those in the know, like Prodrive and even Subaru thermselves, stick with Recirc dumpvalves

 

Ok ill keep an eye out for one cheers for the info :-)