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My Engine Starts. But It Works Very Bad!

GreeceS13

By GreeceS13,
in Engines & Forced Induction

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GreeceS13 Rising Star

GreeceS13

Posted
Posted

Please check first my specs in my signature.

My car start to work before two days but we have many problems!!

It works VERY VERY VERY LEAN!! Lean idle (20afr), lean revs on the neutral (17afr) and lean in easy driving (15-20afr).

Very very crap. It revs very very bad. Only at high revs (more than 4000) seems to work better. Ofcourse I don't try to run it in the road with boost but I did a burnout and at high revs looking very coool!! :(

I am not sure what exactly map has the ecu but before I bring here a tuner I want to be sure that I don't have any other problem.

It is a stock r32 ecu and I bought from gtr.co.uk member that he had 1000cc injectors z32 mafs and was twin turbo. He said that his car worked great but he bought the ecu second hand and the ecu writes that it was tunned with 660cc but his car worked good.

I don't want to run the car in boost but it cannot run good neither in vacuum.

It is the map sure? Or I must see for something other?

With avc-r show me at idle that the injectors are open only 1.6% but I am not sure if the avc-r shows right.

Do you have ideas?

Something with mafs?

Something I can check?

I repeat tha I want just to be sure that I don't have any other problem and I need just a tuner.

I am waiting your help please.

Thanks!!!

MBS206 Grand Master

MBS206

Posted
Posted
2.5-3 bar.

We test with several fuel pressures... till and 7 bar!!!

With 7 bar was a little better lol

Any other idea?

Another idea... Get it tuned?

You have VERY lean fuel mixtures. You need to get the car tuned, for your motor, and injectors... Tune it. Now.

GreeceS13 Rising Star

GreeceS13

Posted
  • Author
Posted

I will tune the car.... but I want to be sure that I don't have any other problem. The tuner is in an other city and I must send the car there.

So if I have any problem there will be very difficult for me.

Also it very strange to be the car SO SO LEAAAN!!

Lean idle? Lean at 2000-3000rpm driving?

The car feels like you don't have fuel in the tank and it is ready to run out of juice.

GreeceS13 Rising Star

GreeceS13

Posted
  • Author
Posted

I connect the knock sensors but nothing different...

We have an update...

My tuner send me a map that the car must work he said me.

I put it on and yet it works... but for some minutes only..

So I had 14,7 idle and the car worked ok.. at high revs 10-11afr! Great!!

BUT ALL THEESE ONLY FOR SOME MINUTES.

I don't know why but after some minutes goes again to the yesterday LEAN!! So lean as the previous map!! VERY LEAN!!

Why????? So the problem isn't the map... something other is the problem guys!!!!!

I put off the plugs of mafs and car worked good haha! 10.5 afr idle but it works ok in the safe mode untill 3000rpm. No lean...! And correct idle vacuum!

Problem with mafs?? But what problem? With ignition on but engine off the voltage is 0.48V on both mafs! Is this ok?

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