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" > 700/900 Series General

Notices

700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 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

Fuel in cranckcase

Views : 1512

Replies : 28

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Feb 17th, 2020, 11:24   #11
Shardana
New Member
 

Last Online: May 6th, 2020 14:14
Join Date: Feb 2020
Location: Sassari
Default

Quote:
Originally Posted by TonyS9 View Post
If you arn't turning the engine the injectors should not fire.

Just to be clear I meant to only the turn the ignition on, this is when the fuel pump primes, do not use the starter motor.

If the injectors are leaking then they need to be replaced, but just to be sure its not an electrical issue, unplug the injectors and test again.
Yes, injector leak with big pressure only when pump primes , I do not use the starter motor .
I have already replaced them but they still leak.
There is something that makes them open but I have no idea what it can be
Shardana is offline   Reply With Quote
Old Feb 17th, 2020, 11:27   #12
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Apr 15th, 2024 09:22
Join Date: May 2012
Location: Lakenheath
Default

Quote:
Originally Posted by Shardana View Post
Yes, injector leak with big pressure only when pump primes , I do not use the starter motor .
I have already replaced them but they still leak.
There is something that makes them open but I have no idea what it can be
Did you repeat the test with the injectors unplugged as Tony suggested?
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is offline   Reply With Quote
Old Feb 17th, 2020, 11:54   #13
Shardana
New Member
 

Last Online: May 6th, 2020 14:14
Join Date: Feb 2020
Location: Sassari
Default

Quote:
Originally Posted by Laird Scooby View Post
Did you repeat the test with the injectors unplugged as Tony suggested?
Injectors detached from flute or attached to the flute without electric connession?
Shardana is offline   Reply With Quote
Old Feb 17th, 2020, 12:20   #14
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Apr 15th, 2024 09:22
Join Date: May 2012
Location: Lakenheath
Default

Quote:
Originally Posted by Shardana View Post
Injectors detached from flute or attached to the flute without electric connession?
Attached to the fuel rail/flute but electrical connectors removed.
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is offline   Reply With Quote
Old Feb 17th, 2020, 12:24   #15
Shardana
New Member
 

Last Online: May 6th, 2020 14:14
Join Date: Feb 2020
Location: Sassari
Default

Quote:
Originally Posted by Laird Scooby View Post
Attached to the fuel rail/flute but electrical connectors removed.
Ok Dave, tomorrow i Will test, thanks
Shardana is offline   Reply With Quote
The Following User Says Thank You to Shardana For This Useful Post:
Old Feb 18th, 2020, 10:56   #16
Shardana
New Member
 

Last Online: May 6th, 2020 14:14
Join Date: Feb 2020
Location: Sassari
Default

Quote:
Originally Posted by Laird Scooby View Post
Attached to the fuel rail/flute but electrical connectors removed.
Injectors without emerge dont Lewis, with energy leale with key in II position.
Help !!!
Shardana is offline   Reply With Quote
Old Feb 18th, 2020, 11:44   #17
TonyS9
Premier Member
 

Last Online: Apr 9th, 2024 21:44
Join Date: Jul 2009
Location: Holywood
Default

Quote:
Originally Posted by Shardana View Post
Injectors without emerge dont Lewis, with energy leale with key in II position.
Help !!!
Sorry, can you try again with the translation? That makes no sense atall.
TonyS9 is offline   Reply With Quote
The Following User Says Thank You to TonyS9 For This Useful Post:
Old Feb 18th, 2020, 11:47   #18
Shardana
New Member
 

Last Online: May 6th, 2020 14:14
Join Date: Feb 2020
Location: Sassari
Default

Quote:
Originally Posted by TonyS9 View Post
Sorry, can you try again with the translation? That makes no sense atall.
Injectors without electric connectors don't leak, with electric connectors spray fuel
Shardana is offline   Reply With Quote
The Following User Says Thank You to Shardana For This Useful Post:
Old Feb 18th, 2020, 12:05   #19
TonyS9
Premier Member
 

Last Online: Apr 9th, 2024 21:44
Join Date: Jul 2009
Location: Holywood
Default

I see, so there must be a problem with the injector trigger wire or the ECU.

You need to now unplug the fuel ECU and check the resistance of the injector trigger wire to chassis ground.

The ECU is behing the drivers kick panel right foot (UK right hand drive), remove the door rubber and sill plastic and slide the kick panel out towards you. You then need to remove the ECU retaining bracket. If your car is 96 or later you will need to cut a slot in the ECU retaining bolt to unscrew it, or some way of removing this security bolt.

Test the resistance in one of the injector plugs. There are 2 pins, 1 should be 12V (with ignition on), the other is the trigger from the ECU. The trigger should be open circuit. If you find it is closed to ground then you need to find a short on the wire (its s fat grey wire usually).

If the wire is ok without the ECU plugged in then it must be the ECU (output component has failed). Very rare for it to fail, but possible.

Last edited by TonyS9; Feb 18th, 2020 at 12:11.
TonyS9 is offline   Reply With Quote
The Following User Says Thank You to TonyS9 For This Useful Post:
Old Feb 18th, 2020, 12:32   #20
TonyS9
Premier Member
 

Last Online: Apr 9th, 2024 21:44
Join Date: Jul 2009
Location: Holywood
Default

I'd also mention that I don't know how the LPG connections will affect injector firing, as Dave says the injectors should not be spraying, but maybe there is a fault on the LPG system if its connected to the injector trigger wire for some reason. OR maybe the LPG conversion was a botch (bad) job.

I think this explains the fuel in the oil, but I am surprised the car runs atall without lots of warning lights, fault codes, massive fuel use etc.
TonyS9 is offline   Reply With Quote
The Following User Says Thank You to TonyS9 For This Useful Post:
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 10:22.


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