I lose power when boost kicks at at 3000rpm!

[Luderacer14]

I got everything running good on my car. But when boost kicks in with my gt32 at 3000rpm, my car just bogs and losses power. Any ideas? I have a brand new AMS 72 lb fuel system, with crower stage 2 cams, jwt ecu, z32 maf. I'm confused, this does not make sense. It's like reverse vtec. I'm throwing a tps code, could this cause it. On my safc, my throttle looks like it's good. At idle, it's .456, at wot, it's 3.987. Any ideas??

[1995240sxSE]

at idle it should be at zero, cause you arent using any throttle! Have a ic pipe leak? That is what it sounds like! what psi are you at, at 3000 rpm?

[KATwo40]

I'm with the "IC pipe leak" crowd on this one. At 3k rpm you're probably around 5-6psi, right? Check for leaks and get back to us.

[Jookmasta]

agreed, check for leaks.............worse case scenario, source another tps........

[Florida240sx]

Spark plug gap???? I had that problem right when I installed my kit.Never gapped the plugs. Car was fine until boost was made.But sounds like a boost leak...Spray foam on your mani,piping.....

[virus77]

Boost leak tester to the rescue

zerothread?id=113785

[Luderacer14]

Guys, thxs for the help, i found the problem. I was running too low fuel pressure and my car ran lean and bogged. Thank god i did'int detonate.

[Jookmasta]

what was ur fuel pressure at?

[Luderacer14]

i would of swore ben at jwt told me 7psi, thats what i set it at. Now it's at 40psi.

BTW, i think i glazed my new clutch, it's a spec stage 4 6 puck clutch. I could'int resist. Now it slips. Is there anyway for me to fix it, like drive it soft for 400 miles. I'm hoping i don't have to replace it and give it time to unglaze itself.

[Jookmasta]

wow............7 psi...........how did ur car run? lol. ya 37-42 psi is the norm. as for the clutch, i suggest making a new thread as it will catch more responses.........

[wild_maxx]

hahah 7 psi fuel press. for FI cars won't work But glad you got that fixed mang. Its always little stuff that will drive a person crazy

as for the clutch... try going for another 500 miles or so.... may clear up.

[Luderacer14]

Thxs, the funny thing was i was running too much psi at first and car would'int idle, than it was too low, now it's perfect. I'm gonna have to post pictures of my new setup tomorrow!