Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 24th January 2019, 20:10   #1
suffolk boy
This is my second home
 
fiat panda

Join Date: Sep 2009
Location: haverhill
Posts: 6,720
Thanks: 96
Thanked 586 Times in 526 Posts
Default fbh firing sequence

anyone no the exact chain of events to the fbh firing up.mine has packed up again.i thought it was the fuel pump as i could not hear it clicking.but its not that.so methinks the glowplug must also act as a temp sensor so when the fbh starts to burn fuel it turns the pump on to add more fuel to the fire so to speak.otherwise a failed start could cause slight issues to say the least.i am testing the lot on sunday but i like to no these things if its not i have a duff replacement pump
__________________
fiat panda 1.2 eco
suffolk boy is offline   Reply With Quote
Old 24th January 2019, 20:20   #2
suffolk boy
This is my second home
 
fiat panda

Join Date: Sep 2009
Location: haverhill
Posts: 6,720
Thanks: 96
Thanked 586 Times in 526 Posts
Default

i will answer this myself after a quick read up .yes it does so despite the plug is new along with the burner that will be my number one suspect.will shall see on sunday
__________________
fiat panda 1.2 eco
suffolk boy is offline   Reply With Quote
Old 24th January 2019, 20:39   #3
trebor
This is my second home
 
trebor's Avatar
 
Rover 75 CDTi Connoisseur SE & MG ZT Saloon 190

Join Date: Jun 2007
Location: Coven
Posts: 12,516
Thanks: 526
Thanked 1,877 Times in 885 Posts
Default

Here is the sequence, how far does yours get before it stops ?

Diesel
When starting the vehicle engine the heater goes in
standby. With a water circuit temperature below 60 °C and
an outside temperature below 5 °C (option with outside
temperature sensor) the starting sequence commences.
The glow plug and the combustion air fan are activated.
After 30 seconds the fuel dosing pump starts operation
and combustion air fan operation is suspended for
3 seconds. Subsequently the combustion air fan speed is
increased in two ramps within 56 seconds to nearly full
load operation. After a stabilisation phase (constant
speed) of 15 seconds the combustion air fan speed is
again increased in a ramp within 50 seconds to nearly full
load.
After reaching full load fuel delivery the glow plug is
deactivated and the combustion air fan operation
increased to full load.
During the subsequent 45 seconds as well as in normal
operation the glow plug functions as flame sensor to
monitor the flame condition.
After all these events the automatically controlled heating
operation starts. In case of a no flame condition or a
flameout, a restart is automatically initiated. If the no flame
condition persists, fuel delivery is stopped and the heater
enters an error lockout with a run-down of the combustion
air fan.
__________________
www.midlandsnanomeets.co.uk

Robs Car Gallery

Coven near Wolverhampton WV9

2000 Cowley Built Rover 75 2.0 V6 Club SE/ Atlantic Blue/ Sandstone/Walnut (daily driver)
2003 Land Rover Freelander 1 TD4 HSE Helsinki Blue/Black Leather (swmbo daily driver)
trebor is offline   Reply With Quote
Old 24th January 2019, 23:02   #4
marinabrian
 
marinabrian's Avatar
 
MG ZT

Join Date: Jan 2011
Location: Newcastle Upon Tyne
Posts: 20,151
Thanks: 3,565
Thanked 10,837 Times in 5,718 Posts
Default

This may also be useful

Brian

Faults

Fault lock-out due to faults in the heater

Fuel is supplied for max. 180 seconds if the flame does not start to burn.

Fuel is supplied for max. 85 seconds if the flame goes out during
operation.

The fuel supply is shut off immediately if the system overheats
(temperature limiter is tripped), the temperature limiter is a type J thermocouple clamped to the heat exchanger body adjacent to the BTS141 FET in a TO220 package.

In all cases (except a fault in the combustion air fan), the heater
continues to run for 120 seconds after a fault lock-out. The run-on
time may vary, depending on the software version in the control
unit.

IMPORTANT

A warning is not displayed following a fault lock-out due to overheating, except if reading the digital live data using T4
marinabrian is offline   Reply With Quote
Old 25th January 2019, 20:00   #5
suffolk boy
This is my second home
 
fiat panda

Join Date: Sep 2009
Location: haverhill
Posts: 6,720
Thanks: 96
Thanked 586 Times in 526 Posts
Default

all very usefull currently turn car on and start it and as its has been minus 1 or 2 all this week. fan comes on runs for a fair amount of time ie about a mile on the road .then turns off. heater stone cold.will be testing all the bits one by one sunday using mikes magic tester then go from there.
__________________
fiat panda 1.2 eco

Last edited by suffolk boy; 25th January 2019 at 20:02..
suffolk boy is offline   Reply With Quote
Old 25th January 2019, 20:54   #6
bl52krz
This is my second home
 
bl52krz's Avatar
 
Rover 75 cdt club + Rover 2.5 KV6 Conni SE

Join Date: May 2008
Location: Birmingham
Posts: 11,356
Thanks: 6,587
Thanked 2,262 Times in 1,729 Posts
Default

Fault on pcb board?
__________________
Great Barr, Birmingham.
bl52krz is offline   Reply With Quote
Old 26th January 2019, 20:27   #7
suffolk boy
This is my second home
 
fiat panda

Join Date: Sep 2009
Location: haverhill
Posts: 6,720
Thanks: 96
Thanked 586 Times in 526 Posts
Default

Quote:
Originally Posted by bl52krz View Post
Fault on pcb board?
that was done by french mike years ago.
may well have developed another.will test out all the bits tomorrow.i have a few spares so maybe able to fix it.if not after spending far too much money on it its coming off i cannot keep mucking around with it.life is too short as it is
__________________
fiat panda 1.2 eco
suffolk boy is offline   Reply With Quote
Old 27th January 2019, 09:38   #8
suffolk boy
This is my second home
 
fiat panda

Join Date: Sep 2009
Location: haverhill
Posts: 6,720
Thanks: 96
Thanked 586 Times in 526 Posts
Default

basic test done placed my tester on the fan feed wire to be confronted with a audible screech from the motor and the fan does not work .so thats it for it now unplugged it all .cheapest fix yet.unless anyone has a spare fan cheap?
__________________
fiat panda 1.2 eco
suffolk boy is offline   Reply With Quote
Old 27th January 2019, 09:52   #9
macafee2
This is my second home
 
Rover 75 Saloon & Tourer

Join Date: Sep 2012
Location: Lincoln
Posts: 14,890
Thanks: 1,630
Thanked 3,032 Times in 2,181 Posts
Default

the pump you can test by flashing 12v across it. I think not only do you want to hear it click but you need to make sure fuel comes out at the engine bay.
I did see as post somewhere where pump clicked but was not pumping

macafee2
macafee2 is offline   Reply With Quote
Old 27th January 2019, 10:32   #10
marinabrian
 
marinabrian's Avatar
 
MG ZT

Join Date: Jan 2011
Location: Newcastle Upon Tyne
Posts: 20,151
Thanks: 3,565
Thanked 10,837 Times in 5,718 Posts
Default

Quote:
Originally Posted by suffolk boy View Post
basic test done placed my tester on the fan feed wire to be confronted with a audible screech from the motor and the fan does not work .so thats it for it now unplugged it all .cheapest fix yet.unless anyone has a spare fan cheap?
Is this any good?

LINK

Brian
marinabrian is offline   Reply With Quote
Reply

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. The time now is 13:16.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd