Lack of power 1994 850 SE - Volvo Forums - Volvo Enthusiasts Forum


Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 02-12-2017, 09:11 PM
Junior Member
Thread Starter
 
Join Date: Feb 2017
Posts: 2
Default Lack of power 1994 850 SE

Id like to thank the many years of silent help everyone on this site has done for me.

Vehicle:
1994 850 Sedan 2.5 SE
20 valve
B5252S
276K km
owned the best part of 11 years

So there is a lot of a back story to get here but to summarise:
car would stall on idle at stops randomly for the last year.
been in and out of various mechanics replacing:
MAP, finding out I don't have a MAF, Distributor cap and rotor button, cleaned plugs, replace 1 damaged lead.

After all the mechs gave up, I left it stranded at my parents house and over a few weeks, my tinkering dad thankfully found the culprit, a jammed idle air valve, cleaned it out and lubricated it with silicone.

Now it idles and stays running perfectly.

The problem now is that it revs fine and kicks down fine, but has underwhelming power, I can barely make it up a hill (70km/hr zone) I use to easily get above 90, now I'm lucky to stay above 60.

The throttle if I floor it and wont change up (might be a kickdown issue) but if I back it off just a little it will change fine.

I did a ECU reset on the weekend reading all the wonderful outcomes, have only had 2 key starts during its test phase, but still no luck getting up similar hills.

Read codes before and after, ones that remain (but may not have been cleared correctly)
A1
223 Throttle position (TPS) sensor signal too low
143 Kickdown switch faulty or short to ground
A2
cleared successfully

I also opened up the throttle body and cleaned the small amount of residual soot.

Its also worthy to note that the fuel consumption has gone up, but this may be because I'm revving it high but getting no response after 2500 rpm, it literally feels like that's the peak of it power.

the only things left that I can think of is:
a clogged catalytic convertor
low compression (one mechanic did test this 6 months ago and said it was good for its age)

Has anyone got any other suggestions?
Reply With Quote
  #2  
Old 02-13-2017, 10:42 AM
rspi's Avatar
Administrator
 
Join Date: Mar 2009
Location: Albuquerque, NM
Posts: 15,756
Default

Probably a clogged cat. You can pull the o2 sensor and see if that helps. Also, you can do a compression test yourself. Is it misfiring? Also check the timing.

Reply With Quote
  #3  
Old 02-13-2017, 10:44 AM
rspi's Avatar
Administrator
 
Join Date: Mar 2009
Location: Albuquerque, NM
Posts: 15,756
Default

Reply With Quote
  #4  
Old 02-13-2017, 10:45 AM
rspi's Avatar
Administrator
 
Join Date: Mar 2009
Location: Albuquerque, NM
Posts: 15,756
Default

Reply With Quote
  #5  
Old 12-03-2017, 11:32 PM
Junior Member
Thread Starter
 
Join Date: Feb 2017
Posts: 2
Default final (hopefully) update

An update for those who may have wanted to know.
It had been a lawn orniment for the last 8 months.
I found a genuin mechanic who thanked me for giving him the opportuinity to play with it.
Today i got the call saying it was ready to be picked up.
Still yet to pick it up and confirm his findings.
After all that it was a clogged Cat.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1995 Volvo 850 - lack of power Zach Orenstein Volvo 850 1 07-27-2014 04:23 PM
1998 S40 T4 mis-fire, poor idle, lack of power under load! johnwilton Volvo S40 13 03-16-2007 06:52 AM
lack of power iworkit Volvo S80 9 08-03-2006 01:21 PM
Reluctance To Rev, Lack Of Power Microcat36 Volvo 260, 760 & 960 0 10-09-2005 09:25 PM
Power, or lack of moburki Volvo S70 5 12-23-2004 04:44 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 01:48 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.