Low/No Boost Problems?
I started looking at my boost gauge when accelerating to see if was loosing boost and I definitely seem to be…
Let OFF the gas pedal suddenly at 4000-5000 RPM and listen for a “fluttering” noise of sorts – if you hear that, your CBV is definitely dead. IPD sells a good replacement.
HeyBikey » I had this problem, low boost, checked CBV and replaced the Boost Control Valve, replaced both items with new ones (IPD kit, Blue Spring) replaced all associated vacuum lines. No Better. I had no other drivability issues (for a week) Decided to check fuel line when I had a hot start problem on a warm day. It seemed like vapor lock- I was losing fuel pressure and getting misfire codes when I would try to start it when the engine was hot. I was stumped, and called a local volvo mechanic. He said that the in tank line that goes from the pump to the housing would come loose because the tube on the housing did not have a barb, and that two hose clamps (super tight) on that hose would keep it on there. I went back and checked in the tank. It was loose, I changed the line, added the second clamp and the boost came back. yay.
Nansogre » The fuel pump hose in my 850 had both a top and bottom clamp. They were both tightened as far as they would go but the top one was really not clamping the tube. As soon as I tried spinning the hose it separated from the upper tube. I have spent four days in an unheated garage tracking down a P0172 engine code and no power/turbo above half throttle and this is what the answer was. My fuel pressure at the fuel rail was 18 psi. Now after replacing the hose clamp it is up around 36 psi. I sure wish I had seen this earlier. I really do appreciate these forums.
Loss of power and boost on 850 Turbo Low/No Boost
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2 Comments
Mine did the same thing. There are a couple people on eBay that will repair them for 50.00. I did this and it works great. You have to have it removed and mail it off though. It is an easy job, and there are videos on YouTube.
I own a 1995 volvo 850 (non-turbo fw-drive) and the light is on for ABS. Is there a way to find out what is wrong with it? I took it in
for a diagnosis and they want almost $600. for the part alone and another $100 for labor. I am hoping to find
someone here in Salt Lake City that is reputable, and will do a good job. Do you have any ideas?
Jayne Bradshaw
801-860-4325