Low Boost Problem
#1
8th Gear
Thread Starter
Join Date: Aug 2003
Location: Northern VA
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
![Unhappy](https://rennlist.com/forums/images/icons/icon9.gif)
Looking for suggestions before we pull the turbo. The car is only making .3-.4 bar even with the wastegate disabled (which should take all the electronic stuff out of the equation). The shop pressure-tested the hoses, etc. inspected the testpipe and down pipe for any blockage, and has run out of ideas other than a bad turbo or possibly collapsed cross-over pipe in some place they couldn't see. Turbo doesn't have any play in it or friction, but apparently that doesn't always mean anything.
Any of you wrenchheads have ideas?
Any of you wrenchheads have ideas?
#2
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
If that is a stock wastegate, you need a shop that knows the slightest bit about 951's or you have to give them an ethics lesson. Your wastegate is probably bleeding boost - shim it (free)
![bigbye](https://rennlist.com/forums/graemlins/xyxwave.gif)
#3
8th Gear
Thread Starter
Join Date: Aug 2003
Location: Northern VA
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
It is a stock wastegate (not the best) but my shop, although small, works on a lot of 944s, including 951s and race prep. They had disabled it (shimmed it) right off the bat. Would some kind of intake problem cause low boost even with the wastegate jammed open?
#4
Three Wheelin'
Join Date: Jul 2001
Location: Reading PA
Posts: 1,667
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
First off the waste gate should be shut to make boost. Try pinching the line that runs down to the waste gate and see if you get more boost, be careful you can see 20+ psi boost doing that. One way to see if your waste gate is stuck open is to start the car and let it idle, the part of the exhaust after the waste gate should not get hot with the car just idling. You could also have a leak in your intake lines that can limit your boost.
#5
Addict
Rennlist Member
Rennlist Member
Join Date: May 2001
Location: Melbourne, Florida
Posts: 942
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Any of you wrenchheads have ideas?
Also, try posting this on the 944 turbo and S specific forum to get more responses and keep from making the second page so quick
Good luck,
Rob