SwedeSpeed - Volvo Performance Forum banner

1 - 20 of 21 Posts

·
Registered
Joined
·
26 Posts
Discussion Starter · #1 ·
I have a 95 850 that I thought had a bad turbo. When I got it appart, I found the turbo spins fine. There is an electric/vacuum connection that I think could be my problem. I checked at the dealer and it is called air pressure regulator. Anyone delt with this? Thanks
 

·
Registered
Joined
·
271 Posts
Re: 850 Turbo question (sennafan)

So...what are the actual symptoms?<p>Why do feel you have a bad turbo or air pressure regulator?
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #3 ·
Re: 850 Turbo question (RussBert)

The car will takes a long time go get up to speed. It kinda feels like a bad transmission, but the revs will not go past 2K rpm.
 

·
Registered
Joined
·
63,543 Posts
Re: 850 Turbo question (sennafan)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>sennafan</b> »</i></TD></TR><TR><TD CLASS="quote">The car will takes a long time go get up to speed. It kinda <B>feels like a bad transmission,</B> but the revs will not go past 2K rpm.</TD></TR></TABLE><br>Yeah, guess so <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0"> <br>You may be able to get away with a tranny service and a new PNP switch
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #5 ·
Re: 850 Turbo question (JRL)

It's not the transmission, because the motor will not get past 2000 rpm. I think if it was the transmission the motor would increase the rpm's, but the car would take long to get up to speed. I have the reverse problem the car shifts fine once it gets up to speed. I think I am having trouble building pressure. The turbo spins fine, so I am thinking it is the air pressure regulator not working properly.
 

·
Registered
Joined
·
63,543 Posts
Re: 850 Turbo question (sennafan)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>sennafan</b> »</i></TD></TR><TR><TD CLASS="quote">It's not the transmission, because the motor will not get past 2000 rpm. I think if it was the transmission the motor would increase the rpm's, .</TD></TR></TABLE><p>You're right, my brain was reversed when I wrote that <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0">
 

·
Registered
Joined
·
271 Posts
Re: 850 Turbo question (sennafan)

Seems to me like you're ready to embark on a parts swapping frenzy, in hopes of MAYBE getting it right eventually. <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <p>What is the general condition/state of tune of the car?<p>Do you have a restriction on the air intake?<p>at any rate, why not take the car to a Volvo tech? In the long run, you'll save yourself money <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0">
 

·
Registered
Joined
·
200 Posts
Re: 850 Turbo question (sennafan)

Before just swapping parts, let's take a step back and review the symptons of the problem. <p>1) When you remove inlet hose for turbo, do you see a lot of oil in intercooler hoses or inside of the turbo itself? Is there a lot of play (slop) in the turbo shaft? <p>2) If car is ODB-II (diagnostic port under coin tray under radio), then have auto parts store scan the DTC codes. <p>3) The "air pressure regulator" is probably the wastegate on the turbo. Most wastegates are controlled mechanically -- However ours is controlled electronically by the ECU. Yes, it is possible that the broken wire connector is your problem. What really bothers me, is that your mechanic called it an "air pressure regulator" -- any mechanic familiar with turbo-ed engines would've called it "the wastegate" <p>4) I would search for all missing, disconnected, or leaking vacuum/boost hoses around your throttle body, intercooler, EVAP, power brakes, and turbo. <p>
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #9 ·
Re: 850 Turbo question (robert213)

Thanks, I will try all of those things this weekend. This is my second 850. The first one was non turbo and needed a motor. I replaced it myself and loved the car. I have never did much work on turbo cars so your help is much apperciated <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/cool.gif" BORDER="0">
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #10 ·
Re: 850 Turbo question (sennafan)

I got lucky this past weekend and found a 94 850 turbo in the junk yard. I pulled the turbo and acuator and installed it on my car. The car runs better now, it will get over 2000 rpm, but there are still problems. I dont have any turn signals and there is a oil leak. The oil leak looks like I need a new seal on a line that i think is a return line easy fix. I checked the fuse for the signals and they were ok, so any suggestions. Once I get these two problems I will start looking into the turbo. Thanks.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #11 ·
Re: 850 Turbo question (sennafan)

Turbo isn't building pressure. Anyone know where I can get it rebuilt?
 

·
Registered
Joined
·
271 Posts
Re: 850 Turbo question (sennafan)

it is highly unlikely that the turbo is bad. did you spin the turbine? was it bound up? did it have endplay? is it pissing oil bigtime?<p>check all vacuum lines. check all intake piping.
 

·
Registered
Joined
·
200 Posts
Re: 850 Turbo question (robert213)

One more time with feeling. My hunch is that there is a major leak of air between Air Flow Meter, Intercooler, and Throttle Body.<p><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>robert213</b> »</i></TD></TR><TR><TD CLASS="quote">Before just swapping parts, let's take a step back and review the symptons of the problem. <p>1) When you remove inlet hose for turbo, do you see a lot of oil in intercooler hoses or inside of the turbo itself? Is there a lot of play (slop) in the turbo shaft? <p>2) If car is ODB-II (diagnostic port under coin tray under radio), then have auto parts store scan the DTC codes. <p>3) The "air pressure regulator" is probably the wastegate on the turbo. Most wastegates are controlled mechanically -- However ours is controlled electronically by the ECU. Yes, it is possible that the broken wire connector is your problem. What really bothers me, is that your mechanic called it an "air pressure regulator" -- any mechanic familiar with turbo-ed engines would've called it "the wastegate" <p>4) I would search for all missing, disconnected, or leaking vacuum/boost hoses around your throttle body, intercooler, EVAP, power brakes, and turbo. </TD></TR></TABLE>
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #14 ·
Re: 850 Turbo question (robert213)

I have done all that. There are no codes and there is no oil in the lines. Starting to think there my be a timing problem.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #16 ·
Re: (RussBert)

Will do, but what is a BCS <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0">
 

·
Super Moderator
Joined
·
14,831 Posts
boost control solenoid maybe.
 

·
Registered
Joined
·
200 Posts
Re: 850 Turbo question (sennafan)

Now you are on the right track...<p>Examine and test parts before random swapping of parts. <p>I suspect that the mechanical part of your wastegate is out of adjustment. It has to be centered in order for the electronic part to control it properly. I don't know how to adjust it. Maybe someone else will explain how. <p>I suspect that your turbo inlet hoses are collapsing. <p>I suspect that your exhaust (catalytic convertor) may be clogged. <p>The engine should be able to reach 2K on its own without the turbo. As a matter of fact, your engine should be able to run just fine with the air hoses connected -- thus bypassing the turbo. The fact that your engine doesn't easily reach 2K rpms bothers me. There is a restriction somewhere -- on the intake side?? on the exhaust side?? Maybe valve timing and/or ignition timing is totally off. <p>Maybe, it simply needs new spark plugs, spark plug wires, distributor cap, rotor and ignition coil. <p>It is hard to help without seeing the car in person. <p>
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #20 ·
Re: 850 Turbo question (robert213)

Yesterday we tested the timing and it is 30 degrees out. According to the Haynes manual it can be tested but not adjusted. All the timing marks line up, so now I think I have a computer problem, but nothing shows up on the code scaner.
 
1 - 20 of 21 Posts
Top