My Engine Starts. But It Works Very Bad!

[GreeceS13]

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!!!

[GreeceS13]

Maybe timing?!?

[MBS206]

Get it tuned. Pure and simple.

Also, what base fuel pressure are you running?

[GreeceS13]

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?

[MBS206]

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]

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.

[217/r33]

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.

+1 !

mate as he said get it tuned, you can’t run someone's ecu on your car. every car is different!

[paulr33]

1). stop driving the car

2). throw the ecu you have in the bin

3). get a stand alone

youve been told this before and refused to listen

1000cc's + remaps = bad idea

[Bumblebee]

tune it b4 u kill ur motor.. and its alrite if its lean during idle or cruise..

[Adriano]

Not that lean, you will melt a piston.

[GreeceS13]

How to melt a piston? At idle?? In neutral? Or in driving with 3k rpm?

EGT not more than 500C and +100C because I measure it after turbo!

[R31Nismoid]

you'll melt/kill a piston from detonation... which is whats going to happen with 17:1 AFR's...

As others have said, TUNE.

There is simply no other answer

[GreeceS13]

I don't have any lamda sensors.... can this be responsible for my problem? I know that lamda are only to have better fuel economy at close loop.

[__PhaseShiftDown]

I believe the lack of lambda sensors will only make your car run rich, not lean.

[GreeceS13]

I must have knock sensors??

I don't have......

[GreeceS13]

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?

[blind_elk]

Put a fuel pressure gauge on it. Observe the fuel pressure when the mixtures go lean.

And get the thing tuned!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Guilt-Toy]

threads like this make me want to cry.. "don't cry for me RB engine" the truth is your life is over.

[GreeceS13]

You don't understand what I said you?

The car run rich with the new map and the injectors was open.. I see it from the avc-r!

But after some minutes the car was again in the previous condition... very very lean!

How you explain it?

[paulr33]

GO SEE A TUNER