Small loss of power/Surging problem! 9-3 linear

[SaabSon]

So...I noticed today as I was driving about 70mph on the freeway, with a steady foot on the gas pedal, that the car was having split second losses of power. It seemed as if the car was surging. The surge is small. The boost on the turbo gauge, goes up and down the slightest but I can still feel the car loosing power sporadically! I'm going to try and sort things out tomorrow. I'm thinking I could have a fuel pump on it's way out, a plugged filter somewhere, throttle body fault, or something MAF or vacuum related...That's what came to mind.

Have any of you guys had a similar problem? Any direction would be very much appreciated!

The car is a 2004 9-3 linear with 150k miles on it btw.

 

[T9 man]

Check the vacuum pipes near the turbo and the APC valve. Make sure all hoses clips are tight and slowly check the hoses for any splits. Some of those splits are hard to see so make sure you squeeze the hose as you are checking it. If you have an intercooler fitted make sure you check that pipework also.

 

[TCJBOLDIE]

Sometimes you can locate a leak by spraying soapy water on the hoses and connections while the motor is running as it will make bubbles where there are leaks

 

[T9 man]

^^ Top tip, thanks for that

 

[93SPORTSEDAN]

if it's a diesel, you should check your egr valve... As I have had the same problem of power loss and it was the EGR valve... If not I can't help man.... Good luck!

 

[TCJBOLDIE]

Another way to check 4 induction leaks is to spray some "Start Ya #!#!#!#!#!#!#!" ( BTW that is the real name of the product I kid you not) or similar engine starter around the connections and if the idle speed increases you have found the location of the problem.

http://www.nulon.com.au/products/Ae...#!#!#!#!_Instant_Engine_Starter/#.UvgIdIW-fLI
it's located in "aerosols"

 

[93SPORTSEDAN]

you should also check the hose that goes to your intercooler. Mine was ripped because of the pressure.. That can also be one of the problems. Good luck