I HAVE AN 04 SRT4, 45,000MI, STAGE 1, 3IN DOWNPIPE WITH CUTOUT,BORLAS,MOPAR BOV, IM RUNNING 18PSI, AND I HAVE BEEN TURNING DOWN BOOST AND TESTING, WITH THE CUTOUT OPEN AND CLOSED AND I JUST KEEP BACKFIRING AT HIGH BOOST, MOSTLY HALF TO WOT IT IS DOING THIS, AND IM ALMOST AT A DEAD END,I HAVE CHECKED PLUGS, AND THE GAP,AND WIRES AND IF ANYONE CAN HELP OR THROW SOME IDEAS AT ME IT WOULD BE AWESOME? ALSO WHEN MY CAR GETS HOT THE IDLE WILL JUMP A COUPLE RPMS, AND SOMETIMES WITH WILL HOLD AT LIKE 3 GRAND AND WILL TAKE A SECOND TO GO BACK TO NORMAL, AND WHEN IT DOES THIS, MY BOOST GUAGE BOUNCES AROUND TO 20 TO 17 VACCUME.....EHH THIS IS DRIVING ME CRAZY, AND I JUST KEEP TURNING BOOST DOWN THINKING IM OVER BOOSTING, AND IT STILL REALLY HAS NOT HELPED, I TURNED IT AGAIN TODAY, AND IM HOLDING AT 15 PEAKING AT 18...

 

take the boost controler out and see if it is diong the same

 

I DID tHAT, AND IT STILL DOES IT, im pretty sure my holding idle is a tps problem, but my backfire/detonating problem is making me nuts....and on my wastegate, the rod, I HAVE BEEN TESTING WITH THAT, and i was told making it longer will lower boost, and making the rod shorter will raise my boost....is this true, or am i ****ing **** up? haha

 

i would change your wastegate back to the stock one also. Just keep elminating parts untill you find your answer. I know this is a dumb question but did you put 87 octane in it or something. Could be bad gas also i suppose.

 

NEVER, I ONLY RUN PREM.SHELL V-POWER....I DONT KNO WHAT THE STOCK SETTING IS ON THE WASTEGATE, ITS A STOCK WASTEGATE, AND I DONT KNO IF I SHOULD BE MAKING THE ROD SHORTER OR LONGER?

 

AN NO NOT BAD GAS IT HAS BEEN DOING THIS FOR 2 WEEKS AND I HAVE FILLED UP 3 TIMES SINCE....SO IT CANT BE BAD GAS,

 

the stock wastegate isnt adjustable. Did you put a new wastegate on there or did you buy the car like that.

 

I BOUGHT THE CAR LIKE IT WAS....I KNO OF SOME STUFF THATS DONE TO THE CAR, BUT SOME STUFF I CANT TELL, IT JUST ACTS UP ALOT...LASTNIGHT I WASRACING A LIGHTNING FROM A STOP AND HE PULLED A CAR AND THEN I BEAT HIM ABOUT A LENGTH BUT WE STOPED AT 100....AND HE WAS JUST LIKE DANM...HE COULDNT BELEAVE IT...I HAVE ALOT OF PLANS FOR THIS CAR, BUT I JUST NEED TO GET IT RUNNING RIGHT...IF I PULL OFF THE THROTTLE AND DONT GO WOT IT WONT BACKFIRE...LIKE I SAID IT ONLY DOES IT AT FULL BOOST

 

it's called fuel cut. turn your boost down.

 

I DONT HAVE MY BOOST CONTROLLER ANYMORE,...... ON THE WASTEGATE DO I MAKE THE ROD LONGER OR SHORTER TO LOWER BOOST? ....YEA THAT WAS ONE OF THE THINGS I WAS THINKING...THANKS PSICHICK, IM NEW TO srt4S AND HAVE HAD MINE FOR ABOUT 2 WEEKS AND IM MORE THAN HAPPY EATING SUPERCHARGED V-8S...IM GETTING A BOOST CONTROLLER SOON, BUT IN THA MEAN TIME I WANT TO LOWER IT ON THE WASTGATE....