3.9 with Hotwire injection - flooding
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3.9 with Hotwire injection - flooding
Hi guys,
Pulling my hair out with this one!!!
Ok so engine is a 3.9 rover v8 running standard hotwire injection system Running green tune resistor
TVR cam (unknown model)
Standard Heads
So, i HAVE had this engine running, idled fine, drove ok (bit kangaroo-y whilst cruising but good otherwise) but it had a bit of a top end rattle. I had it apart, drained all the lifters, and readjusted the lifter preload as couple of pushrods were loose (I have used shims, i know they arent ideal but all the lifter preloads are within the 0.060 to 0.020)
Once i put it all back together it now just floods! I can get it started by holding the throttle open but as soon as I let off it just dies.
So far I have done the following:
Checked timing - currently at 8 degrees BTDC
Replaced Spark Plugs - using BP6ES
Checked fuel return line for blockage - all clear
All vac lines are connected as they should be
Tried winding the idle bypass screw all the way out - still floods
I got hold of a suitable cable and the rover gauge software:
Replaced TPS sensor as it was reading incorrectly
Replaced Idle air control valve as it wasnt moving (though was in the fully open position) The new one moves as it should
Checked AFM readings - all ok
Water and Fuel temperature senders are reading correctly
No fault codes
The only thing I havent looked at is the fuel pressure regulator.
Any other ideas before I go mad?
Stu
Pulling my hair out with this one!!!
Ok so engine is a 3.9 rover v8 running standard hotwire injection system Running green tune resistor
TVR cam (unknown model)
Standard Heads
So, i HAVE had this engine running, idled fine, drove ok (bit kangaroo-y whilst cruising but good otherwise) but it had a bit of a top end rattle. I had it apart, drained all the lifters, and readjusted the lifter preload as couple of pushrods were loose (I have used shims, i know they arent ideal but all the lifter preloads are within the 0.060 to 0.020)
Once i put it all back together it now just floods! I can get it started by holding the throttle open but as soon as I let off it just dies.
So far I have done the following:
Checked timing - currently at 8 degrees BTDC
Replaced Spark Plugs - using BP6ES
Checked fuel return line for blockage - all clear
All vac lines are connected as they should be
Tried winding the idle bypass screw all the way out - still floods
I got hold of a suitable cable and the rover gauge software:
Replaced TPS sensor as it was reading incorrectly
Replaced Idle air control valve as it wasnt moving (though was in the fully open position) The new one moves as it should
Checked AFM readings - all ok
Water and Fuel temperature senders are reading correctly
No fault codes
The only thing I havent looked at is the fuel pressure regulator.
Any other ideas before I go mad?
Stu
The most common reason for over fuelling is a faulty CTS - but you said you'd checked that? Does it make a difference if you unplug it? With it working correctly, this would make the engine think it's cold and go to warm up fuelling. So if that makes no difference on a warm engine I'd suspect the wiring or whatever.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Well this issue has now come back and I am completely stumped
Engine is now fitted with adjustable pushrods, initial startup was spot on, ran smooth etc.
Took it out for a test drive, loads of power, no hesitation or kangarooing or anything like that.
When i came back and pulled up it just died. I cannot for the life of me get it to idle or start on its own, hot or cold. It will ONLY run/start if i hold the throttle open slightly.
I have the rover gauge program and have checked the following:
Coolant temp sensor is reading correctly
Fuel temp sensor is reading correctly
TPS reads ok from 0 to 100% throttle
The IACV is reading correct in the program and moves freely from fully closed to fully open (and is fully open when starting)
AFM is set at 1.1v CO adjustment
NO fault codes on ECU
Timing is currently at 10 BTDC
Yet it just floods everytime i go to start it, sods law just booked it in for its MOT now its being a pita
Help!!
Stu
Engine is now fitted with adjustable pushrods, initial startup was spot on, ran smooth etc.
Took it out for a test drive, loads of power, no hesitation or kangarooing or anything like that.
When i came back and pulled up it just died. I cannot for the life of me get it to idle or start on its own, hot or cold. It will ONLY run/start if i hold the throttle open slightly.
I have the rover gauge program and have checked the following:
Coolant temp sensor is reading correctly
Fuel temp sensor is reading correctly
TPS reads ok from 0 to 100% throttle
The IACV is reading correct in the program and moves freely from fully closed to fully open (and is fully open when starting)
AFM is set at 1.1v CO adjustment
NO fault codes on ECU
Timing is currently at 10 BTDC
Yet it just floods everytime i go to start it, sods law just booked it in for its MOT now its being a pita
Help!!
Stu
Check the spark isn't weak when you start the motor up mate sounds like its the symptoms off the ignition module failing. Also if you have played around with the air bypass screw then you would need to reset it properly using blanks on the manifold make sure that no air is getting into the engine via the bypass screw and set the base idle off the engine reconnect the bypass pipe and see what happens
Land rover discovery 3.9 Hotwire v8 nick named Christine.
I'f the plugs are wet it could be a ignition module failing maybe. Or to rule out the bypass screw being too far in adjust the throttle cable to hold the throttle a little so the butterfly is held open if that happens then I would be looking at base idle settings first as if there is very little air getting in it won't tick over.
Plus as already stated a air leak can cause the problem.
Plus as already stated a air leak can cause the problem.
Land rover discovery 3.9 Hotwire v8 nick named Christine.
I think I may have found the problem.
The roverguage program wasnt showing up a fault code but noticed that the select fuel map was "0" which is limp home mode - very rich.
Bit of checking and found a dislodged pin on the tune resistor plug (green resistor) so it wasn't connected at all. Re connected and fuel map is now set to "2". Battery currently flat so will charge it up and see what happens.
thanks again for all the response!!
Stu
The roverguage program wasnt showing up a fault code but noticed that the select fuel map was "0" which is limp home mode - very rich.
Bit of checking and found a dislodged pin on the tune resistor plug (green resistor) so it wasn't connected at all. Re connected and fuel map is now set to "2". Battery currently flat so will charge it up and see what happens.
thanks again for all the response!!
Stu