HELP!!!!!STUMBLE POSSIBLY?

[massdiesel]

FIRST I HAVE A STUMBLE AT ABOUT 1850 - 2000 RPM THEN AROUND 2400 AGAIN ALMOST LIKE A SKIP OR LOSS OF ELECTRICAL OF SOME SORT IT SEEMS TO BE WORSE SINCE I PUT ON A BLUE BOX HAD IT REFLASHED BY CHIP BUT NO CHANGE BUT ALSO HAD ECM REFLASHED JUST PRIOR TO INSTALL OF BLUE BOX . IS IT POSSIBLE TO BE FROM THE NEW ECM REFLASH ANYONE HAVE THE LATEST AND GREATEST REFLASH NUMBER FOR A 99 I DONT WANNA JUST LIVE WITH THIS ANY HELP WOULD BE APPRECIATED THANKS



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99 24v auto 3500 4x4 reg cab 3. 55 axle,va cpc,275 injectors,k&n,rhino lining, tinted glass, tonnoue cover heavy duty trailer tow set up goose neck hitch draw tite brake setup,cb,cd player,catz back up lights,amsoil frnt to back,jre exhaust4 wire blue box, pressure lock,bd exhaust brake,JRE style transgo shift kit, a pro torqe extreme convertor, and a magtec trans cover and trans guage,JRE fuel line kit,upgraded fuel pump,braided fuel lines from lift to injector pump,reflashed ecm,power edge ez,fuel pressure guage,3 guage pillar,boost&pyro

 

[B.G. Smith]

Sounds like the engine is starving for fuel, have you changed the fuel filter lately? If so you need to verify that you are getting fuel from the lift/transfer pump. Should be above 7 pounds. bg

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White 99 3500, QC, 3:55, auto. most options except leather, Line-X bed liner, fiberglass running boards Rancho 9000s, bug shield and window vents, black vented 5th wheel tailgate, 110 gal. aux. fuel tank.

 

[massdiesel]

SORRY BG ALREADY HAVE DONE THAT I HAVE A AFTERMAKET FUEL SYSTEM AND CHANGED OUT THE LIFT PUMP AGAIN KEEP THEM COMING THANKS`

 

[Steve St.Laurent]

My guess would be one of the connections on the blue box harness. I'd try removing the BB and see if it goes away. I had a stumble because of a bad connection with my powermax box that went away once I removed it and put it back on.

-Steve St. Laurent