ever since i put the longtubes on the car it kind of runs like ****. when i step on the gas it will gain rpm but as its doing so it kind of stutters and cuts in and out like i'm towing a trailer down a bumpy road. i don't know what the **** is going on. could it be the tune? also, i filled up the car and since then i've gone 63 miles and i've burned a HALF tank of gas! WTF?! i figured the longtubes would make my mpg go down slightly but this is horse ****. its probably getting 10mpg or less right now and that is unacceptable. anyone have any insight on this. oh by the way, my CEL hasn't come on since i did the headers and off road H. do you think it has something to do with my o2 sensors? i figured the light would come on by now, my rear o2's are on.. they should have tripped the cel by now unless my front ones aren't working right. i'm a little bit pissed off... the car doesn't seem like it has any more power at all and it feels like it is cutting in and out at WOT. any help would be great.
my car is running like ****
B0B
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good luck man
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17,839 Posts
Ill need it for everything to turn out good! Thanks! lol. Hopefully this tune will get it right!
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5,846 Posts
i think once you get it tuned you'll change your mind. usually once its tuned it won't have problems unless you change things.. like headers... lol
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now corect me if I am wrong but the reason I never considered headers is because I have read in a few places that they dont yeild any real gains? I know they make a better sound????? any info? I still dont think I will ever change mine but I like to know.
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they say you can see some really good gains on a supercharged car. once i get my car put on a dyno and re-tuned i'll post the numbers up.
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Well, I run KB so??????? Let me know
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5,598 Posts
on KB's site it says that headers really didnt help a whole lot...
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5,598 Posts
deffinatly not worth 500 bucks
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2,880 Posts
Hey BOB, I was looking on the Kenne Bell site looking for something and this sounded like what you were talking about. I am not 100% sure what all you have but here it is:
Then there's those "factory calibrated" mass air meters that do not use a chip or re-calibrated processor with oversize injectors. They unwittingly reduce the voltage signal to the mass air meter to compensate for the larger injectors at WOT but they neglect all the driveability issues. The result is over advancing timing, lean mixtures, detonation, surging, bucking etc.
Kinda sounds familiar?
Then there's those "factory calibrated" mass air meters that do not use a chip or re-calibrated processor with oversize injectors. They unwittingly reduce the voltage signal to the mass air meter to compensate for the larger injectors at WOT but they neglect all the driveability issues. The result is over advancing timing, lean mixtures, detonation, surging, bucking etc.
Kinda sounds familiar?
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hmm well i guess we'll find out.. it definitely sounds badass though thats for sure :tomato
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5,555 Posts
Look for an front O2 wire touching the header.
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^ yah, thats what I was looking on the KB site for because I remembered reading that.
BoB, do you still have the stock mam?
BoB, do you still have the stock mam?
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5,598 Posts
i dont know from experience but its just what i read,
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15,289 Posts
Sounds like your o2 sensors to me. Headers shouldn't have hurt your tune that much. Do what jive said by checking the wires. If you haven't replaced them yet. Maybe now is a good time to do so. It's about time for me to change mine out since starting the car is getting a little harder to do now.
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I dont know, the blurb I pasted ^ sounds like a good possibility unless he changed the stock one?
mass air meters that do not use a chip or re-calibrated processor with oversize injectors. They unwittingly reduce the voltage signal to the mass air meter to compensate for the larger injectors at WOT but they neglect all the driveability issues. The result is over advancing timing, lean mixtures, detonation, surging, bucking etc.
mass air meters that do not use a chip or re-calibrated processor with oversize injectors. They unwittingly reduce the voltage signal to the mass air meter to compensate for the larger injectors at WOT but they neglect all the driveability issues. The result is over advancing timing, lean mixtures, detonation, surging, bucking etc.
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1,572 Posts
soon to be. lol. i couldnt just do mylilpony.
so give it time and not worry about it :yes
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5,846 Posts
this is good insight! i have a 90mm maf on it but it also has a mafia... so chances are its giving me shitty readings and causing it to run a little funny, and when i moved those o2 sensors it could have messed it up just enough more for it to confuse the hell out of the car.
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