Go Back  Volvo Forums - Volvo Enthusiasts Forum > Volvo Vehicles > Volvo 850
Reload this Page >

Sputtering on take off when tank full, not PNP and not transmission fluid

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.

Sputtering on take off when tank full, not PNP and not transmission fluid

  #1  
Old 05-16-2018, 06:01 PM
Junior Member
Thread Starter
Join Date: May 2018
Posts: 2
Default Sputtering on take off when tank full, not PNP and not transmission fluid

hey everyone. Iíve exhausted my resources trying to figure out a very strange problem. Whenever my tank is above halfway full, every so often when accelerating from a stop the car sputters and takes between 3-10 seconds to start actually getting some power. The RPMís do not increase so itís not a slipping tranny, and the fluid looks fine and is at the proper level. I will say it seems sort of thin, and Iíve read in here some times water/coolant can get into the fluid through a radiator leak? But the thing is once the car is above 30 mph itís conpmetely fine, usually itís fine above 15 mph. The weird part is itís incredibly inconsistent, like I said only when tank is full, sometimes it happens every time I go from a stop, sometimes once in a while. Almost never when the tank is half full, completely never when itís close to empty. Worst day was after sitting for 24 hours tried driving and it wouldnít engage for minutes at a time and then wouldnít exceed 30 mph, but hat only happened once. I have two codes: A2 code: 114 (open or short circuit to supply mode selector switch) And A6: 311 (speed sensor not there or not working)

the gas level correlation makes me suspicious of the speed sensor being an issue especially since cruise control and shifting at 20mph+ And I had the mode selector switch resistance checked and it was fine, and I cleaned it out. I have checked tranny fluid levels consistently, and coolant lines for leaks around the radiator with nothing. I heard pnp might be throwing the 114 code so I bought a new one from a friend for cheap and put it in which made no difference. I know my pcv system is dirty but I doubt thatís it, Iíll be changing that soon. Please help.

The car is a 93 Volvo 850 without turbo.

Thanks

sam
 

Last edited by sambianculli; 05-16-2018 at 06:02 PM. Reason: Left out information
  #2  
Old 05-16-2018, 08:58 PM
Moderator
Join Date: Mar 2012
Location: Ridgefield, CT
Posts: 4,782
Default

the only thing I can think of would be with the fuel pressure at full tank - ie a venting problem on the fuel return. How do you correlate tank level to speed sensor? did you check out a wiring diagram to see if there's any commonality?
 
  #3  
Old 05-17-2018, 05:04 AM
860ARE's Avatar
Senior Member
Join Date: Feb 2018
Posts: 126
Default

The tranny oil cooler is in the radiator. If it developes a leak inside the two fluids will mix definately dont want coolant in the gearbox
 
  #4  
Old 05-17-2018, 11:11 AM
Senior Member
Join Date: May 2012
Location: Kingsport, TN
Posts: 1,513
Default

If the engine is sputtering, I think I'd try to fix that rather than the transmission.
 
  #5  
Old 05-17-2018, 01:08 PM
860ARE's Avatar
Senior Member
Join Date: Feb 2018
Posts: 126
Default

A clogged catlytic converters can cause you to loose power especially up hill and under heavyload depends on how clogged it is
 
  #6  
Old 05-17-2018, 02:10 PM
Junior Member
Thread Starter
Join Date: May 2018
Posts: 2
Default

Any ideas as to why it is directly correlated to the fuel level? All of those things donít seem like it would matter if my fuel tank was full or low
 
  #7  
Old 05-30-2018, 04:29 PM
Moderator
Join Date: Mar 2012
Location: Ridgefield, CT
Posts: 4,782
Default

see my comments about the tank venting. google around for issues with the carbon cannister or vent purge valve.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wouldbemechanic
Volvo S80
6
06-24-2015 08:51 PM
turkishroyal
Volvo S70
3
06-30-2012 09:41 AM
pphilps
Volvo 240, 740 & 940
9
07-27-2011 03:53 PM
act1292
Volvo 240, 740 & 940
3
11-11-2009 10:24 AM


Thread Tools
Search this Thread
Quick Reply: Sputtering on take off when tank full, not PNP and not transmission fluid


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.