supercharged_ss Posted March 31, 2009 Report Share Posted March 31, 2009 i have a 03 sc ss awd when i get on the throttle it wants to shut down like ther is no power i changed the plugs and it help alittle but now when i get on the throttle to 3000 rpms it stays at 3000 rpms and does a backfire i checked my fuel press and inline fuelpump but everything works fine so if anybody could help me with this issues thanks Quote Link to comment Share on other sites More sharing options...
misterp Posted March 31, 2009 Report Share Posted March 31, 2009 You need to provide more information - what is the observed fuel pressure? the observed MAP sensor reading, do you have a wideband on the truck, what is your AFR doing? any spark timing logs? Mr. P. Quote Link to comment Share on other sites More sharing options...
supercharged_ss Posted March 31, 2009 Author Report Share Posted March 31, 2009 the bad part is i have no clue what everything the truck has i bought the truck from a dealer and they have no history of what the owner did to the truck it has many mods Quote Link to comment Share on other sites More sharing options...
lunaru03 Posted March 31, 2009 Report Share Posted March 31, 2009 Did you check all your air hoses ? IAC valve cleaned or replaced ? Quote Link to comment Share on other sites More sharing options...
Jaymz Posted March 31, 2009 Report Share Posted March 31, 2009 With the little information provided.. almost sounds tuning related. I see your from Denver.. We should get a meet set up this summer Quote Link to comment Share on other sites More sharing options...
Krambo Posted March 31, 2009 Report Share Posted March 31, 2009 Does REP (Reduced Engine power) pop up on the dash (DIC)? By any chance did the dealership flash an "update" into the PCM and overwrite the supercharger tune? I can see an inexperienced Tech (or some one who was too lazy to open the hood) just overwriting the tune in an effort to make sure the truck has the most current GM updates. Quote Link to comment Share on other sites More sharing options...
8 UR HMI Posted March 31, 2009 Report Share Posted March 31, 2009 my truck had a radix on it when i got it and it was doing something similar/ i didnt know anything about it but i found out that they clean sweeped the pcm not knowing anything about it cause i picked it up at a nissan dealership Quote Link to comment Share on other sites More sharing options...
mcmahan Posted March 31, 2009 Report Share Posted March 31, 2009 i agree also sounds like a tune issue Quote Link to comment Share on other sites More sharing options...
packjh Posted April 1, 2009 Report Share Posted April 1, 2009 Nice kit i have the same on in polished..... Sounds like a tuning issue. Like its running to rich under throttle. I had a tune for my stock injectors while my bigger ones were in and it did basically the same thing... On a side note is your IAT sensor relocated, if not you might be posting up the same pictures i did not to long ago. Quote Link to comment Share on other sites More sharing options...
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