Ok so 2 months ago my Clutch Master Cylinder went bad and literally i let the car sit for all that time because i was to lazy to change it. Well i changed it last night, plugged back in the FIC (had to have it unplugged because of the auto ecu battery drain). And car is running fine, cruising the same but now it wont enter boost at all...

turbo will start spooling to start to enter boost (wg doesnt even start to open) but then my AFR goes to triple dashes on the AEM gauge and car literally goes no where, feels slower and it doesnt spool anymore. I dont get what could have happened... Nothing has been touched at all....

 

Maybe pull your efi fuse to reset the ECU. Computer can do weird things.

 

the life of piggyback ecus

 

think i need to reupload the map?

 

I am guessing the stock ecu reset its fuel trim. Car needs to be retuned.

 

drive nice for the first 50 miles so the computer can rejust itself,has to relearn all its values again

 

so your saying just drive around and my car will start driving like its tuned again? sounds like a longshot.

car def seems like its leaning out when spooling up. unfortunately my boost gauge isnt working so i cant pinpoint where.

 

^^ This guy knows what hes talking about. Just drive easy for like 30 mins, slow acceleration and then everything will smooth out.

 

so ive been driving all day. still nothing, leans out when coming anywhere near boost.

 

My money is on the FIC being the problem unless your tune was so bad that the ECU needs massive trims to compensate. Check and clean your MAF too. Good luck.

 

not sure how the FIC could randomly just go bad? the tune was on the money by Mike in orlando.

 

Could this have to do with the battery? ive noticed it keeps dying. last night i got jumped, and this morning it wont turn on.

time for a new battery.

 

I just meant to check the FIC calibration and function. Mine used to go flaky sometimes and had to be re-flashed. Hopefully the new battery solves your problems.

 

maybe i overrated 50 miles,but it takes the ecu a few cycles for it to relearn all its values again,in that time fram,i would stay out of boost,until car is runing normal again

 

If you are sure that your tune is good, try reflashing the FIC... if that doesnt work, try to get your hands on another FIC and flash that to test if your actual unit got fried some how.

Fix your boost gauge asap, and do a boost leak test.

 

well the FIC still has the map on it, i just reflashed it with the map. think a vacuum leak could cause a leanage near boost? but if a leak was occuring wouldnt my idle be messed up? should i reset stock ecu or plug it in and let the car sit on for a little?

 

UPDATE: Pulled efi fuse to "reset" stock ecu while i had the stock setup plugged in.
Reuploaded map to FIC. Still unable to get into boost. Putting in a new boost gauge tonight to see exactly where this starts happening. pretty sure its before any boost as i cant even get the wg open for a little. car leans out hard when into the throttle after spooling a little.

 

Possibly a bad map sensor on the FIC.

 

i dont get how something could go bad if the car literally was just sitting.... this is a puzzle.

 

Think it could be fuel pump? car seems to have trouble starting sometimes, just cranks and i have to hold key for a bit....