bradboyd80
Member
- :
- '12 Velocity Red MS3
Ok, so after all the work I've done, my car is still bogging pretty bad when in boost. I'll lay out what I have already done, and what I plan to do today. I'd like to know if anyone has any other suggestions on what to check. My mods are in my sig. Oh, and btw, my boost gauge is reading perfect vacuum (20hg) and holding boost at 7psi.
What I've done:
fresh oil change (about 300 miles ago) with Mobil 1 synth.
coils and wires are pretty much new (about 8k miles on them)
cleaned EGR several times
cleaned MAF several times
ran new vacuum lines
checked wga....no leak
checked for shaft play....negative
sprayed intercooler pipes to check for leaks; nothing found
I did change the spark plugs from copper to the 1 step colder NGKs, but even before I changed from copper, it was doing the same thing.
On the list for tonight:
Seafoam and another oil change
new stock heat range spark plugs (NGKs)
check manifold for any cracks
I can hear pretty pretty loud hissing, but really only gets bad during boost. But when the car is at idle and I pop the hood, I don't hear anything. So it leads me to believe its a boost leak. I've also read that when the car feels like I hit a brick wall, it could be fuel cut. However, I've also heard that I won't hit fuel cut until it reaches about 10psi....which my car isn't doing.
So anyone know what else it could be? Or recommendations on anything else to check or change????
What I've done:
fresh oil change (about 300 miles ago) with Mobil 1 synth.
coils and wires are pretty much new (about 8k miles on them)
cleaned EGR several times
cleaned MAF several times
ran new vacuum lines
checked wga....no leak
checked for shaft play....negative
sprayed intercooler pipes to check for leaks; nothing found
I did change the spark plugs from copper to the 1 step colder NGKs, but even before I changed from copper, it was doing the same thing.
On the list for tonight:
Seafoam and another oil change
new stock heat range spark plugs (NGKs)
check manifold for any cracks
I can hear pretty pretty loud hissing, but really only gets bad during boost. But when the car is at idle and I pop the hood, I don't hear anything. So it leads me to believe its a boost leak. I've also read that when the car feels like I hit a brick wall, it could be fuel cut. However, I've also heard that I won't hit fuel cut until it reaches about 10psi....which my car isn't doing.
So anyone know what else it could be? Or recommendations on anything else to check or change????
