ninety7gst
15+ Year Contributor
- 101
- 0
- Jul 30, 2003
-
KansasUS
Well guys, I know that this topic has been beaten to death, but no matter how much I search these threads, I just can't find the answer to my problem.
I bought the car and I didn't give it a good test run (stupid idea) because I was thinking that since the car has a 1G motor in it with a 75k mi warranty then I'm set... Well boy was I wrong.
My mods are as follows, turbo extreme downpipe w/ 02 eliminator, test pipe (no cat), apexi n1 catbact, precesion 50 trim turbo, apexi twin chamber bov, Turbo XS h.p.m.b.c. MBC, walbro 255 lph fuel pump, Jasper bored 6 bolt engine, also it's a '97 GS-T
I decide to gun it on the highway it starts to kick in about 10 or so psi then runs strong to 15... well i changed my mbc to run 20psi, so the boost doesn't kick in till about 10 still and runs strong to 20 then u get a few kicks and such, well I was fine for awhile then I notice that the boost doesn't really kick in till 15 now, then goes to 20 and kicks, once you start to boost at 15 it'll boost all the way till to then surge fast from 10 to 20 while it is kicking. So I pull the - battery cable - off and put it back on, (mistake) because now I floor it and if i get up to about 10 PSI it'll shit out on me, backfire and you hear a whizzing noise in the engine bay. Normal driving, (less than 1/2 throttle, no boost) it's fine. However, when you lay into the throttle is where it starts becoming bad. My gas mileage is crap (~17MPG) which makes me believe I'm running rich. I changed my sparkplugs (NGK) and my fuel filter. I'm going to change the blow-off valve to a GReddy whenever I get the new UPIC pipes in from Dejon Tool. Although I don't believe that is where my problem is...
Thanks for checkin' out my thread and help me please if you have any suggestions...
Oh, and I checked for a boost leak, and I don't have one.
I bought the car and I didn't give it a good test run (stupid idea) because I was thinking that since the car has a 1G motor in it with a 75k mi warranty then I'm set... Well boy was I wrong.
My mods are as follows, turbo extreme downpipe w/ 02 eliminator, test pipe (no cat), apexi n1 catbact, precesion 50 trim turbo, apexi twin chamber bov, Turbo XS h.p.m.b.c. MBC, walbro 255 lph fuel pump, Jasper bored 6 bolt engine, also it's a '97 GS-T
I decide to gun it on the highway it starts to kick in about 10 or so psi then runs strong to 15... well i changed my mbc to run 20psi, so the boost doesn't kick in till about 10 still and runs strong to 20 then u get a few kicks and such, well I was fine for awhile then I notice that the boost doesn't really kick in till 15 now, then goes to 20 and kicks, once you start to boost at 15 it'll boost all the way till to then surge fast from 10 to 20 while it is kicking. So I pull the - battery cable - off and put it back on, (mistake) because now I floor it and if i get up to about 10 PSI it'll shit out on me, backfire and you hear a whizzing noise in the engine bay. Normal driving, (less than 1/2 throttle, no boost) it's fine. However, when you lay into the throttle is where it starts becoming bad. My gas mileage is crap (~17MPG) which makes me believe I'm running rich. I changed my sparkplugs (NGK) and my fuel filter. I'm going to change the blow-off valve to a GReddy whenever I get the new UPIC pipes in from Dejon Tool. Although I don't believe that is where my problem is...
Thanks for checkin' out my thread and help me please if you have any suggestions...
Oh, and I checked for a boost leak, and I don't have one.