I got an 03 SS with no major mods on it, intake, exhaust with no cat, u bend or resonator and tune basically... Been having some trouble lately when i start it up it runs great for a few seconds and then it starts surging as if i had a major vacuum leak or a HUGE cam lol... If i rev it a bit it goes away and then when i take off it feels like its gunna die and even when i floor it it just bogs down farther and all of a sudden its fine and im thrown back in my seat! Ive swapped out: MAF, TPS, IAC and taken out my TB spacer suspecting a faulty gasket. Ive tested all around my vacuum lines with some carb cleaner and cant get any signs of a leak... any ideas?!? The car has been fine for two years with all these mods and now all of a sudden its crap. no check engine light or any codes...

 

Try this.get a can of Sea Foam.pull the vacume hose from the brake booster.pour some sea foam in the hose reconnect the hose and let it idle.it will smoke like a pig.do it a couple times. if its carbon up it will clean it out. but in the same note it could be a vacome leak to.so listen and see if you can hear one.

 

Yeah i cant hear a vacuum leak mostly cuz my intake is so loud lol but i have tried to listen and cant hear anything, i will have to try the seafoam method next tho thanks for the tip!

 

I'm more inclined to suspect the MAF sensor. If those things aren't reading data correctly, they can do weird things. Go to the parts store and buy the MAF Cleaner (I believe it's a gray spray can). Follow the directions and see if that helps. If it doesn't next step, basic maintainence:
- Change Plugs/Wires
- Change Fuel and Air Filters

 

Plugs and wires are 2 months old as well as fuel filter and i cleaned the old MAF and replaced it even with a different one, i guess the one i replaced it with could be bad as well seeing as it was used but it ran fine in the car i pulled it from which was another Monte

 

Check you plug wires for grounding on your exhaust. I had this happen to me recently on the back bank. Melted through the housing and was arcing on my exhaust pretty much making that cylinder non existent until high rpm.

 

As PacerSS said, check the plug wires. Also, what brand plugs? If you say BOSCH, dump them! I've used BOSCH in GM v6s and they are CRAP. After I learned by experience, I see a lot of people with the same statements. BOSCH wires are fine, just NOT plugs.

 

No I went with delco. I had the zzperformance wires before but they were junk and kept popping off