650cc and cant tune at all

[GSTdude06]

I bought some FIC 650cc injectors and no matter what I cant tune them. The SAFC and logger arnt making sense to me. I tune short trim to 0 and long tirm to but when I tune the short trim to 0 the car doesnt run right AT ALL so I cant get to the long trim. I ended up at around -43 at 2000 rpms for it to run right but the logger said short trim was positive 8. Move the -43 down some car wouldnt run right. So im lost.....should I sell the injectors and figure whats going on? Or should I keep them and take it to a shop and pay the 150$ a hour for them to do it?

Logan

 

[99gst_racer]

Mybe try installing a Keydriver chip. I had mine burned for my 650's and my car ran great. I only needed minimal tuning on the AFC after I installed the Keydriver chip.

Just a thought.

 

[timgt]

Take it to a reputable tuner

 

[mavisky]

650's on an s-afc are near the limit of what you can adjust for.

 

[CanadianTSi]

Are you sure your doing it right? My car runs just fine with 650's and an S-AFC.

Maybe you have a boost leak or the injectors aren't seated correctly? check for the little things.

 

[mavisky]

I've got my car pretty lean on my low trim on the exact same injectors and the maft alone.

 

[GSTdude06]

Well its not the tuning I found out, cause I reinstalled my 450's and I cant even go past 2000rpms......

So im bout to leak test it.

 

[Tevenor]

Step 0 for any problem diagnosis should ALWAYS include a leak test. Hell I do a leak test when my tire pressure is low.

 

[GVR4592]

Step 0 for any problem diagnosis should ALWAYS include a leak test. Hell I do a leak test when my tire pressure is low.

Hey me too, I thought I was the only one. Bird shit on the window=boost leak test.

 

[GSTdude06]

I do em everytime something is going wrong....but before I installed the injectors I did one cause your not sopose to tune with any.....so I did and found none (soapy water) well installed the injectors and something went wrong so I figured first a pipe came loose but didnt so I figured it was the injectors...changed them out still had it.....leak tested and found a leak...I blew a gasket

But now I got another gasket for my jpipe and no matter what it doesnt seal...i hear a high pitch noise and soapy water shows its from there.... any ideas? silicon sealant?

 

[99gst_racer]

Well its not the tuning I found out, cause I reinstalled my 450's and I cant even go past 2000rpms......

Ouch! Is the CEL lit up?

 

[GSTdude06]

Its always lit up..... i have 3 codes..