Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > 200 Series General

Notices

200 Series General Forum for the Volvo 240 and 260 cars

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

'91 240 issues

Views : 1067

Replies : 22

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Apr 21st, 2019, 19:41   #1
Grahambharper
New Member
 

Last Online: Aug 7th, 2019 04:21
Join Date: Mar 2019
Location: Houston, TX
Default '91 240 issues

Hello all,

I'm having a problem with my 1991 Volvo 240.
During normal driving it seems to not be getting enough fuel at higher speeds. Right now the car does not have a lot of power and will not go faster than 55mph. If I clamp the fuel return line it will easily hit 80mph but then (predictably) is getting to much fuel in the lower speeds and idle. I am at a total loss as I have already cleaned out the fuel lines, changed the fuel filter, changed the fuel pump and changed out the fuel pressure regulator.

Any ideas?
Graham

I forgot to mention, this is a B230F engine with a Bosch fuel injection system, the ECU and in tank pump have both been swapped with known working ones.

Last edited by Grahambharper; Apr 21st, 2019 at 21:25.
Grahambharper is offline   Reply With Quote
Old Apr 21st, 2019, 22:58   #2
Bugjam1999
Master Member
 

Last Online: Yesterday 13:13
Join Date: Nov 2012
Location: London and Cambridge
Default

I presume the check engine/lambda light is on? If so, there are codes to be read-

https://www.volvoclub.org.uk/faq/EngineOBDCodes.html

Read the above guide and see which fault codes the system has stored, then reply on here.

My guess is the lambda sensor, but check the codes before buying parts.

Cheers
Bugjam1999 is offline   Reply With Quote
Old Apr 22nd, 2019, 03:00   #3
Grahambharper
New Member
 

Last Online: Aug 7th, 2019 04:21
Join Date: Mar 2019
Location: Houston, TX
Default

Thank you for the reply,

The lambda (o2) sensor did go bad and was replaced about a month ago, I'm not getting any codes (or CELs) since replacing it besides the occasional 2-3-1 - Lambda control - too lean or too rich at part load.
Grahambharper is offline   Reply With Quote
Old Apr 22nd, 2019, 03:55   #4
DW42
Senior Member
 

Last Online: Oct 9th, 2022 05:41
Join Date: Feb 2011
Location: Currumbin, Queensland
Default

Have you checked, cleaned and/or replaced the fuses? It's important -- I believe that the fuel pump is fuse number 6.
__________________
Present: 1990 240GL saloon, 1992 240 estate
Past: 1988 240GL; 1971 144DL; 1972 145DL
DW42 is offline   Reply With Quote
Old Apr 22nd, 2019, 04:51   #5
Grahambharper
New Member
 

Last Online: Aug 7th, 2019 04:21
Join Date: Mar 2019
Location: Houston, TX
Default

Yes I have checked the fuses and the relay, both pumps are turning on.
Grahambharper is offline   Reply With Quote
Old Apr 22nd, 2019, 06:39   #6
DW42
Senior Member
 

Last Online: Oct 9th, 2022 05:41
Join Date: Feb 2011
Location: Currumbin, Queensland
Default

This is a tough one. It's possible that your new O2 sensor has failed, especially if this never happened before replacing it. Given that you've been swapping in parts, I assume you have easy access to spares. I'd be tempted to switch out the ICU, as you already switched out the ECU.
__________________
Present: 1990 240GL saloon, 1992 240 estate
Past: 1988 240GL; 1971 144DL; 1972 145DL
DW42 is offline   Reply With Quote
Old Apr 22nd, 2019, 14:28   #7
Grahambharper
New Member
 

Last Online: Aug 7th, 2019 04:21
Join Date: Mar 2019
Location: Houston, TX
Default

I have an 84' that I have been pulling parts off of just to see if it works. Does anyone know if the ICUs are compatible between the two years?
Grahambharper is offline   Reply With Quote
Old Apr 22nd, 2019, 21:27   #8
Nicholas Lewin
newish member
 

Last Online: Nov 8th, 2020 00:35
Join Date: Jan 2016
Location: London
Default

I think... but only think, that the two ICUs were different designs and therefore simply not interchangeable

My '91 B230F has an ICU which goes thru' 90 degrees (the earlier one I believe is in line) and is Bosch p/n 0280140516 if that helps

Good luck
Nicholas Lewin is offline   Reply With Quote
Old Apr 22nd, 2019, 22:40   #9
Bugjam1999
Master Member
 

Last Online: Yesterday 13:13
Join Date: Nov 2012
Location: London and Cambridge
Default

Wait a sec - has this problem appeared since you changed the lambda sensor?

It's entirely possible it has failed again - I had a new one fail within a few weeks once, which was obvious when I removed it as the interior porcelain insulator was broken and rattled when I shook it.

If you can get under the car and remove it to have a look then I'd suggest that as a very first step - should be easy to unscrew if it was replaced recently.

Cheers
Bugjam1999 is offline   Reply With Quote
Old Apr 22nd, 2019, 23:01   #10
Dirty Rooster
Premier Member
 

Last Online: Nov 23rd, 2023 15:26
Join Date: Jun 2014
Location: Haltwhistle
Default

Quote:
Originally Posted by Grahambharper View Post
During normal driving it seems to not be getting enough fuel at higher speeds. Right now the car does not have a lot of power and will not go faster than 55mph..
If you disconnect the MAF does it get even worse or stay the same?
__________________
1993 2.0 Turbo SE with 1991 2.0 Turbo engine.
Older is better!
Dirty Rooster is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump


All times are GMT +1. The time now is 20:39.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.