2.7i help please

[SpeedWiz]

Hi i have a 325e that i am currently making into a 327i
so far i have changed:
AFM, TPS, MANIFOLD, WIRING HARNESS, CPU, PULLEYS, SENSORS, ETC.
(I kept my e injectors in with the fpr)
I have an issue tho,
my car fires up just fine and idles okay but if i touch the throtle a little bit it wants to die on me but if i press it a little more it will rev up but wont stay constant it bouces. I have checked the sensors, oxygen sensor AFM TPS they are all okay. It runs very rich and back fires some

please if anyone can help please post thank you

[Devil Inc]

You need to use the I injectors and FPR. That should solve most of your issue.

[SpeedWiz]

why would that matter tho? because thge e injectors are smaller
wouldnt the i larger injectors just make it more rich?

[Devil Inc]

They're of different impendance. Also, the FPR is 2.5 bar on the ETA and 3.0 bar on the I engine.

[SpeedWiz]

but more pressure would give it more fuel wouldn't it?
its runnning rich i need less right?

[Devil Inc]

The amount of fuel delivered to the combustion chamber is controled by the DME. Which uses readings from the: TPS, O2 sensor, AFM to determine and tailor the amount that gets sent. The FPR regulates the fuel pressure in the fuel rail, not the amount of fuel delivered to the cylinders.

[Devil Inc]

The injectors are like middle men, they do what the computer tells them. In your case they are misinterpreting the signal and delivering the wrong amount of fuel.

[slo325i]

Stop running the car... You'll burn up the injector driver due to the impedence difference.

[SpeedWiz]

ok but do you have any advice on how to fix the problem?

[Alkasquawlik]

ok but do you have any advice on how to fix the problem?

You need to use the I injectors and FPR. That should solve most of your issue.

Read. ^

[nando]

you will fry that ECU if you don't change the injectors. It may already be too late. the reason is because e injectors are low resistance and i injectors are high resistance. the drivers in the i ECU are only designed to run high resistance injectors.

[Arems87e]

Dude! just do as they say, Trust Me...i made tha same mistake while i was building mine. If you're going to use e injectors, u'll need to change the harness, ECU, and AFM back..I dont think tha FPR matters, cause i've run both FPRs b4

[nando]

the FPR absolutely does matter, because the e uses a lower fuel pressure (2.5 bar vs 3 bar). But using the wrong FPR isn't as big of a deal as using the wrong injectors

[SpeedWiz]

thank you guys so much! it works!
next is a 325i head :-]

oh by the way sorry for the post asking about how to fix that was my girlfriend replying
sorry guys and thanks

[eta]

eta injectors flow more than i injectors! So thats why a higher FPR is needed. It works well I have done it as well.