so i installed my boost guage last night..Yes im giac chipped, and diverter valve..my vaccum is at 20 and im only boosting at 11 and spike to like 14 at times..my car felt like it pulled harder the other day..What should the vaccum reading be? and how much should i be boosting to??well i think i might be on limp mode ..but not sure def need help..

 

is it a 180 or a 225?

 

Hey if you are only spiking 14 you might be reverted to stock or if you were serviced recently you may have been flashed, a chipped car should spike 18 to 19 and hold 15 16.

Limp mode could be the case or your N75 might be bad, In my case I have revo and when i installed my boost gauge it read a 22 spike and jumped to 11, I put a 4.7 diode on thinking I was limping, but it still did it afterwards, it turned out my n75j valve was bad, and my revo software was in a revert to stock mode or something. Its fixed now, and I spike 20 and fall to 16 at then end of the gear.

If at idle you are 20 vacuum that is excellent, and at about 65-70 MPH you should be around 10

Did you hook up the gauge to to the line going to the fuel pressure regulator? If it pulled harder the other day, you might have caused a leak. Or it may seem like your slower, because your gauge is not reading what you expected.

 

i got the giac chip and i spike at 20-22 and i hold at 15-17. what els do you have dont to your car

 

Limp is ~5psi BTW

 

well my is the 180hp..and i haven't done nothing else to it pretty stock..

 

Wow.. so I reset my car and im hitting 19psi and holding around 16 so i think my car is back to normal. But I do feel a little hesitation like around 4rpm.

 

Thats a hard limp, Look it up 11 is a soft limp

 

Seems something threw a code. Not sure the what could be the hesitation, but a leaking dv would be where i would start.

 

ok so i hooked up a MBC and wow what a difference it makes my car feels real nice..I actually hooked up a turbosx mbc and i didnt know i had bought the one that only goes up to 15psi the $80 dollar one and the **** actually fell of..I was wondering why i wasn't hittin 18 psi and the **** was turned all the way..so i wen back and returned and paid the difference for the performance one $140 one lol..can't wait to hook that one up and this time i better be hitting 18psi [:@]...def did not feel any hesitation when i had the mbc hooked up..the acceleration felt so smooth and it pulled so hard, i never felt my car run this strong..really happy with the improvement..