Upgraded Injectors, Loss of HP? HELP!

[Saul325is]

I am doing the Big Six conversion right now. So the first two things that needed to be done are done(get a fuel pressure gauge and afpr). I got a package that came wiht a bav auto rising rate AFPR. So yesterday I decided to install my mustang 19lb injectors, and after installing them, I started up the car, let it idle at 2.5 bar, then took it for a spin at 3.0bar, after driving it around for a while I noticed that my car was extremley slower. I think i might of loss 15hp at the crank, maybe more. Am I running on 5 or 4 cylinders, or is it that I am running rich(even though im at 44psi right now wiht the piece of shit bav auto AFPR)? I havent yet installed the M30 AFM, but am soon going to do that. I dont have a air fuel ratio gauge, so I dont really konw whats going on. So any ideas on this?

So:
Mustang 19lb Injectors, Bav Auto AFPR, 40psi Fuel pressure, Fuel Pressure Gauge=One slow e30...

Rich?
Or running on 4 or 5 cylinders...

...Also, i noticed that my car warms up alot faster than normal(water temperature raises pretty quick from cold state).

..One other thing, I notice water comming out of my exhaust when I start it up from a cold-warm state, also when the car is cold, I see white smoke comming out..

Thanks,
Saul

[Spaz]

Re: Upgraded Injectors, Loss of HP? HELP!

I am doing the Big Six conversion right now. So the first two things that needed to be done are done(get a fuel pressure gauge and afpr). I got a package that came wiht a bav auto rising rate AFPR. So yesterday I decided to install my mustang 19lb injectors, and after installing them, I started up the car, let it idle at 2.5 bar, then took it for a spin at 3.0bar, after driving it around for a while I noticed that my car was extremley slower. I think i might of loss 15hp at the crank, maybe more. Am I running on 5 or 4 cylinders, or is it that I am running rich(even though im at 44psi right now wiht the piece of shit bav auto AFPR)? I havent yet installed the M30 AFM, but am soon going to do that. I dont have a air fuel ratio gauge, so I dont really konw whats going on. So any ideas on this?

So:
Mustang 19lb Injectors, Bav Auto AFPR, 40psi Fuel pressure, Fuel Pressure Gauge=One slow e30...

Rich?
Or running on 4 or 5 cylinders...

...Also, i noticed that my car warms up alot faster than normal(water temperature raises pretty quick from cold state).

Thanks,
Saul

correct me if i am wrong but aren;t you surrposed to rasie the fuel pressure to allow the computer to adjust to the bigger afm? and not just the injectors?

[Saul325is]

I still have the stock M20 AFM on, havent installed the M30 AFM yet

-Saul

[nando]

I bet your new injectors are clogged. also, it takes a good hard run driving the car up to redline to get the ECU to reduce the duty cycle enough to where you aren't running so rich. Lastly, I don't have an AFPR - and no, my car does not run rich. I actually get the same fuel mileage I always did, and the engine runs a bit smoother.

So basically, something is either wrong with your injectors or your FPR. maybe one of them leaking. Did you have them cleaned, and did you replace the caps/seals? Mine came from a 60k mustang, I cleaned them up with alcohol and replaced the caps and seals. I haven't gotten around to installing my AFM yet though.

try putting the stock FPR back on, reset the ECU, and drive the piss out of it once and see if it makes your problem go away. either that or have the injectors cleaned out.

[Saul325is]

I bet your new injectors are clogged. also, it takes a good hard run driving the car up to redline to get the ECU to reduce the duty cycle enough to where you aren't running so rich. Lastly, I don't have an AFPR - and no, my car does not run rich. I actually get the same fuel mileage I always did, and the engine runs a bit smoother.

So basically, something is either wrong with your injectors or your FPR. maybe one of them leaking. Did you have them cleaned, and did you replace the caps/seals? Mine came from a 60k mustang, I cleaned them up with alcohol and replaced the caps and seals. I haven't gotten around to installing my AFM yet though.

try putting the stock FPR back on, reset the ECU, and drive the piss out of it once and see if it makes your problem go away. either that or have the injectors cleaned out.

Yeah, I hope its not the injectors! I was thinking about putting my stock FPR back on, and im probably going to do it. How do i reset my ECU? Also, by easing the injectors in, I can leave my stock FPR on right? So basically all i need is a stock FPR, I dont even really need an AFPR, right? Thanks alot for your help

Oh yeah, I didnt have my injectors cleaned, but I lubed up the o-rings. I purchased my injectors from Neogentik, and they looked very clean when I recieved them(came wiht plastic covers and everything). Is there a type of additive that will clean the injectors out, so I dont have to take apart my fuel rail again .?

-Saul

[nando]

just disconnect your battery for a few minutes to reset the ECU.

fuel injector cleaners don't work very well at all. pretty much if they need cleaned it has to be done by a shop. I don't think it's very expensive, at least.

[DaN]

Well you are obviously running rich.

You needlessly increased injector flow rate, AND increased the fuel pressure.
Until you get a little more air in there with the m30 afm, I would turn the fuel pressure down below stock, because right now all that fuel isn't needed.

All the water you see in the exhaust comes from the excess hydrocarbons(raw fuel) being processed by the converter.

One more thing, did you make sure the injectors were suitable for the driver in the ECU? If you put low resistance injectors in where high resistance are required, the car will run bad and you will fry the ecu.
Look up injector resistance in your manual, and check the new ones to make sure they are close to the original ones.

[Saul325is]

Well you are obviously running rich.

You needlessly increased injector flow rate, AND increased the fuel pressure.
Until you get a little more air in there with the m30 afm, I would turn the fuel pressure down below stock, because right now all that fuel isn't needed.

All the water you see in the exhaust comes from the excess hydrocarbons(raw fuel) being processed by the converter.

One more thing, did you make sure the injectors were suitable for the driver in the ECU? If you put low resistance injectors in where high resistance are required, the car will run bad and you will fry the ecu.
Look up injector resistance in your manual, and check the new ones to make sure they are close to the original ones.

So the water thing, basically means that I am running to rich?
Also, my injectors are suitable for my car(they are the high resistance ones the mustang 5.0 injectors Ford FTOBE)

One other thing, I noticed that my MPG has gone up to like 24mpg from 18. And my "Range" on my OBC is at like 325miles, and is still around that range after i drive like 50 miles.

Thanks for your help guys...So basically I should just disconnect the battery(reset the ECU), and install my stock FPR? Once my stock FPR is back on, I should take my car for a spin and basically ease the injectors by driving the car at high RPM's?

Thanks,
Saul

[arnib]

One other thing, I noticed that my MPG has gone up to like 24mpg from 18. And my "Range" on my OBC is at like 325miles, and is still around that range after i drive like 50 miles.

I believe that the OBC uses the injector pulses to measure the amount of gas, and it doesn't know that you now have bigger injectors.

At least Gunni's OBC tells him he's getting 2x better mileage, but he also has two times bigger injectors in his S50 than was in the M20B25 :)

[nando]

One more thing, did you make sure the injectors were suitable for the driver in the ECU? If you put low resistance injectors in where high resistance are required, the car will run bad and you will fry the ecu.
Look up injector resistance in your manual, and check the new ones to make sure they are close to the original ones.

19# mustang injectors have the same resistance as 325i injectors. this is already known.

I wouldn't run with less than stock fuel pressure.. just put the stock FPR back on.

[Saul325is]

Yeah will do! I want to make sure everything is ok with the injectors before proceding in swapping the electronics off of the M20AFM into the M30AFM

Thanks!

-Saul

[Saul325is]

Follow up, I just took my car down to BMW Service Specialist in downtown, and they did a diagnostics, and everything seems to be running great(all cylinders are running). I will now put my stock FPR back on and reset my ECU. One last question, if I have a 2.5bar FPR, could i just leave that on? Or do i have to buy a 3.0bar fpr, after the 2.5barfpr has been eased into the ECU.

...Also, how do I know when the injectors have bene eased into the ECU? Could i just run a 3.0bar fpr, and ease the injectors into that???

Thanks alot guys,
Saul

(no more questions ;).

[DaN]

You really didn't need to take the afpr off, it's adjustable so you can just adjust it back to stock settings, or less.
Running a little less than stock fuel pressure wont hurt anything, if the injectors static flow rate is too large, less fuel pressure will compensate for that.

You just need to do some tuning, a dyno, with an exhaust gas analyser would be ideal.

[e30evolution]

you are running lean if your car is heating up faster..... i would say clogged injector, or a leaking injector

[Saul325is]

Any way to tell if i have a leaking injector???