|
700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
Information |
|
Bringing a 740 back to lifeViews : 23256 Replies : 240Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Mar 20th, 2021, 21:32 | #21 |
bob12
Last Online: Apr 25th, 2024 11:19
Join Date: Aug 2006
Location: Woking
|
Just a newbie here .... to this thread and confess haven't read thoroughly so may have missed something that's been said along the way.
Smell petrol on removing a plug? Tacho flicking on cranking? Have you tried immediately putting your foot to the floor on the accelerator pedal as soon as it doesn't start, i.e. after 2/3 seconds? If not do so and, hold accelerator to the floor while continue cranking without stopping until hopefully it fires up! You might flatten the battery if it's not up to the mark!! Assuming it's LH2.4 the first xxx 590 ecu's had a problem. Bob |
The Following User Says Thank You to bob12 For This Useful Post: |
Mar 20th, 2021, 21:39 | #22 | |
Premier Member
Last Online: Today 00:28
Join Date: May 2012
Location: Lakenheath
|
Quote:
No fuel reaching the fuel rail apparently but i had wondered about the ECU seeing as it's an early LH2.4 - anything else that comes to mind on that?
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
|
The Following User Says Thank You to Laird Scooby For This Useful Post: |
Mar 20th, 2021, 21:52 | #23 | |
Senior Member
Last Online: Mar 10th, 2024 20:33
Join Date: Nov 2018
Location: Reading
|
Quote:
|
|
The Following 3 Users Say Thank You to Challo For This Useful Post: |
Mar 20th, 2021, 21:59 | #24 | |
bob12
Last Online: Apr 25th, 2024 11:19
Join Date: Aug 2006
Location: Woking
|
Quote:
Bob |
|
The Following User Says Thank You to bob12 For This Useful Post: |
Mar 20th, 2021, 22:20 | #25 | |
Premier Member
Last Online: Today 00:28
Join Date: May 2012
Location: Lakenheath
|
Quote:
Hoping my suggestion of percussive maintenance to the back end of the tank shifts it and the ATF helps lube things back to a running standard again.
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
|
The Following User Says Thank You to Laird Scooby For This Useful Post: |
Mar 20th, 2021, 23:46 | #26 |
bob12
Last Online: Apr 25th, 2024 11:19
Join Date: Aug 2006
Location: Woking
|
Final comment - I wonder what flash code numbers the in-built OBD 1 reader is throwing up on both settings .... not that it's an accurate diagnostic tool being in its infancy stage.
Bob |
The Following User Says Thank You to bob12 For This Useful Post: |
Mar 21st, 2021, 00:00 | #27 | |
Premier Member
Last Online: Today 00:28
Join Date: May 2012
Location: Lakenheath
|
Quote:
1. MAF 2. AICV 3. Both 1 and 2 4. None. If the in-tank pump isn't pumping and therefore the main pump is only pumping air, the MAF won't see increased airflow when the engine should be running and isn't and the ECU won't see increased engine rpm from the AICV being opened more so the ECU decides they must be faulty while completely overlooking the lack of fuel because it's Bosch and nobody could believe you wouldn't have petrol coming from the fuel pumps!
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
|
The Following User Says Thank You to Laird Scooby For This Useful Post: |
Mar 21st, 2021, 00:27 | #28 |
bob12
Last Online: Apr 25th, 2024 11:19
Join Date: Aug 2006
Location: Woking
|
Like your thinking man .... pump up the volume. Thank goodness I don't have these little niggles .... currently 745 battery on Spring charge and, the V70 is a just a dreamboat until it goes pear shaped! Bob.
|
The Following User Says Thank You to bob12 For This Useful Post: |
Mar 21st, 2021, 00:38 | #29 | |
Premier Member
Last Online: Today 00:28
Join Date: May 2012
Location: Lakenheath
|
Quote:
I've yet to confirm the location and operation of it but might prove useful one day if i can't get any sense out of the usual checks if something goes belly-up! I suppose a hand-held oscilloscope could be used instead of the LED to actually measure the duty cycle but i wonder how accurately it would set the mixture. When i'm bored one sunny day i'll investigate this feature to firstly confirm its existence, secondly the operation of fault code reading and lastly while hooked up to the Gastester, to see if the mixture can be set accurately.
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
|
The Following User Says Thank You to Laird Scooby For This Useful Post: |
Mar 21st, 2021, 10:27 | #30 |
Senior Member
Last Online: Mar 10th, 2024 20:33
Join Date: Nov 2018
Location: Reading
|
Tried the tap and slap a few times this morning but no luck on getting her started. I’ll order the ATF and give that a go and see if we have any luck.
Just a thought, but as I changed the pump and filter under the car, could I have done anything wrong here? You can hear the pump now, and all the pipes and screws put back together properly with no leaks. |
The Following 2 Users Say Thank You to Challo For This Useful Post: |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|