this its very helpfull for me also i just got the same problem that this guy i did a huge street port to my 6 port engine non turbo my car has a s4 fuel injection system and after i run it for a while it try to shut off so im guessing that the injectors are the problems but i dont know and i hate spending money in stuff that i dont really need ...... i was thinking if my solution was putting this throttle body http://*************.com/rotary_foru...ad.php?t=13197 plus a microtech so that way i take that problem out of my car ..... but i dont know if that set up its good for street cars... cause some people say that the microtech will contro everything...... but i dont know if that its nesesary

 

[IMG]8 injectors throttle body[/IMG]

 

Fixed.


But don't do this to your car. If you want to install a standalone, that's one thing. You don't need this crap^ for a street ported NA engine.

 

this all sounds overly complicated for a simple streetported motor.

more air in is still measured by the airflow meter and compensated for, i have streetported many many n/a engines and never have any of them had a large enough issue that required a standalone to fix it.

problem sounds like a vacuum leak to me. if anything you should be looking into figuring out what the issue is first, going to a standalone is just a sledgehammer fix, unless you are looking to make the most from the setup.

i just can't for the life of me see why no one has even mentioned this.

 

Update. This thread is over a year old...
I replaced the FD fuel pump back to the stock unit, as well as the injectors.
The main problem I was having initially was a faulty air flow meter. After that I found my tps had no wide range. Only narrow.
The car is running much better now.
I decided to use the RTEK. I have yet to tune it to much from the base map, but it is nice for monitoring what is happening under the hood.
The car has less than 400 miles on it since rebuild.
Infact I just this last week Hooked up 6PI and VDI to a RPM switch.
Seems to be running fine now.
Thanks for all the input guys!!
-Robert.

 

yes i know it was old but it was bugging the **** out of me that everyone was giving in and tossing out standalone options, like the Rtek which wouldn't have cured a thing.

 

Holy yellow text Robert! lol, unreadable without highlighting ^_-

Anyway, good to hear that it's doing well!

Though, I hope you aren't running the VDI and 5th/6th at the same time...? Should be ~3600 for 5th/6th and ~5500 for VDI.

EDIT: >_< and here's where I remember that it's an S5.... So why use an RPM switch at all? The ECU should be handling that for you..

 

Thanks Derek. Yes they are on different circuits. The air pump I am using takes about .75 to open so I have the switch for the 6PI set to 3400, and the VDI is 5400. They open just about right.
I removed emissions, and the air pump hence the RPM switch to control these.
*yellow text fixed*