defender 4.6 auto
Discussion
Hi all
I have a 4.6 running 14cux, a 4hp22 and 1.2 tc taking up space in a disco 1
and a 110 (pre defender) with the asthmatic 3.5 on carbs connected to the LT85.
Are there any additional parts that I will need to perform the conversion that won't be in the two landys?
I've read that the lucas injection system can be run with only a couple of wires, but what if I want more like cruise control which is on the disco 1 in my defender? would it be plug and play or would I have to get an aftermarket system.
I have a red wire coming out of the throttle body which i haven't seen on others in the internet so could someone tell me if this is better or not??
And once MOT'd I'll add an emerald K6 to the shopping list.
I'm planning on starting work sometime in july if i can complete my exams by then...
I have a 4.6 running 14cux, a 4hp22 and 1.2 tc taking up space in a disco 1
and a 110 (pre defender) with the asthmatic 3.5 on carbs connected to the LT85. Are there any additional parts that I will need to perform the conversion that won't be in the two landys?
I've read that the lucas injection system can be run with only a couple of wires, but what if I want more like cruise control which is on the disco 1 in my defender? would it be plug and play or would I have to get an aftermarket system.
I have a red wire coming out of the throttle body which i haven't seen on others in the internet so could someone tell me if this is better or not??
And once MOT'd I'll add an emerald K6 to the shopping list.
I'm planning on starting work sometime in july if i can complete my exams by then...
Samee said:
Hi all
I have a 4.6 running 14cux, a 4hp22 and 1.2 tc taking up space in a disco 1 and a 110 (pre defender) with the asthmatic 3.5 on carbs connected to the LT85.
Are there any additional parts that I will need to perform the conversion that won't be in the two landys?
I've read that the lucas injection system can be run with only a couple of wires, but what if I want more like cruise control which is on the disco 1 in my defender? would it be plug and play or would I have to get an aftermarket system.
I have a red wire coming out of the throttle body which i haven't seen on others in the internet so could someone tell me if this is better or not??
And once MOT'd I'll add an emerald K6 to the shopping list.
I'm planning on starting work sometime in july if i can complete my exams by then...
You'll need to replace the LP fuel pump on the 110" for a HP one - you might be able to fit the Disco 1 fuel tank in place of the 110" fuel tank assuming it is a rear-mounted tank.I have a 4.6 running 14cux, a 4hp22 and 1.2 tc taking up space in a disco 1
and a 110 (pre defender) with the asthmatic 3.5 on carbs connected to the LT85. Are there any additional parts that I will need to perform the conversion that won't be in the two landys?
I've read that the lucas injection system can be run with only a couple of wires, but what if I want more like cruise control which is on the disco 1 in my defender? would it be plug and play or would I have to get an aftermarket system.
I have a red wire coming out of the throttle body which i haven't seen on others in the internet so could someone tell me if this is better or not??
And once MOT'd I'll add an emerald K6 to the shopping list.
I'm planning on starting work sometime in july if i can complete my exams by then...
Otherwise mount a HP pump near the fuel tank and as low as you can (HP pumps don't like to "lift" fuel), or keep the LP pump and have it supply a swirl pot which then feeds the HP pump. The seatbox area might be a good place to do this - away from under bonnet heat soak.
Lucas 14CUX needs engine speed signal from the coil (via a resistor), ignition, gearbox neutral, battery supply, road speed signal and a ground.
Throttle body having a red wire? Do you mean the Airflow Meter or the actual plenum itself? Photo would help.
The cruise control of this vintage on RR was a stand-alone affair with vacuum servo connected to the accelerator linkage, I suspect the Disco 1 used the same arrangement. Wiring diagram and parts book is a good way to figure out what you need.
Any questions please feel free to PM me.
Interesting and topical thread, I have *just* finished installing a 3.9i, also running the 14CUX, with a 4HP22 behind it. It's up & running and MOTd now (100SRV, I realise I hadn't updated that little fact anywhere on PH - apologies, I got it sorted just before lockdown started!) although I do have some wrinkles to sort out still.
I started with the donor Disco and my 90 side by side on the drive and for a hundred and one reasons it has taken me almost 2 years to complete.
100SRV is the local Oracle on these matters and has helped me out with all manner of queries but I'm happy to help and input if I can.
Is the 14CUX happy driving a 4.6? I believe those were all on GEMS systems out of the factory? Even the D2 4.0 was a different system (possibly also GEMS). I had a loose understanding of the 14CUX which is the main reason I plumped for that option.
My first approach was to electrically "disconnect" the 14CUX from the Discovery, leaving the engine bolted in place, but I needed to prove to myself that I could run the engine off a battery with nothing but the Disco fuel pump connected, to prove that I'd got the connections right and that I knew everything I needed to lift from the Disco.
I went for the swirl pot/HP fuel pump option, with the original LP pump remaining in the tank, but the HP pump (rubber-mounted on the bulkhead) is really quite noisy. I wonder now whether the pump from a diesel Landie will (a) be a direct fit in the tank, and (b) produce enough pressure; something to look into.
From memory, to run the 14CUX you need a permanent live, a switched (ignition) live, a live feed to the fuel pump (via the ECU) and an earth; I *think* that's it, it took me a while to get my head round it but once you see it, its quite simple.
Cruise control is another matter. My donor Disco did have it, and it worked, but I didn't transfer it over. There is a separate ECU required for a start, and it was just more complexity that I didn't want to get into.
Not sure what your red wire is on the TB. There's a multi-plug onto the MAF. Not being daft but are you sure it's not the distributor vacuum pipe and someone has fitted a red one?
I started with the donor Disco and my 90 side by side on the drive and for a hundred and one reasons it has taken me almost 2 years to complete.
100SRV is the local Oracle on these matters and has helped me out with all manner of queries but I'm happy to help and input if I can.
Is the 14CUX happy driving a 4.6? I believe those were all on GEMS systems out of the factory? Even the D2 4.0 was a different system (possibly also GEMS). I had a loose understanding of the 14CUX which is the main reason I plumped for that option.
My first approach was to electrically "disconnect" the 14CUX from the Discovery, leaving the engine bolted in place, but I needed to prove to myself that I could run the engine off a battery with nothing but the Disco fuel pump connected, to prove that I'd got the connections right and that I knew everything I needed to lift from the Disco.
I went for the swirl pot/HP fuel pump option, with the original LP pump remaining in the tank, but the HP pump (rubber-mounted on the bulkhead) is really quite noisy. I wonder now whether the pump from a diesel Landie will (a) be a direct fit in the tank, and (b) produce enough pressure; something to look into.
From memory, to run the 14CUX you need a permanent live, a switched (ignition) live, a live feed to the fuel pump (via the ECU) and an earth; I *think* that's it, it took me a while to get my head round it but once you see it, its quite simple.
Cruise control is another matter. My donor Disco did have it, and it worked, but I didn't transfer it over. There is a separate ECU required for a start, and it was just more complexity that I didn't want to get into.
Not sure what your red wire is on the TB. There's a multi-plug onto the MAF. Not being daft but are you sure it's not the distributor vacuum pipe and someone has fitted a red one?
Thank you cappo!
A 4.6 will run on 14cux but a different fuel map will be required, these are readily available.
Plenty of facts here:
http://www.g33.co.uk/pages/technical_fuel_injectio...
http://www.britishv8.org/Articles/Rover-14CUX-EFI....
Keep the paper element air filter; an oiled cotton air "filter" is a waste of time.
I used the rubber bushes from Defender radiator mount for my HP fuel pump, you can just hear it run before starting the engine.
In the 21 years/ 100,000 miles I've owned the Bowler I've never felt the need for cruise control. Shouldn't be too tricky to retrofit though - the key is to ensure that clutch and brake pedal switches are present to kill cruise control in addition to the control binnacle.
A 4.6 will run on 14cux but a different fuel map will be required, these are readily available.
Plenty of facts here:
http://www.g33.co.uk/pages/technical_fuel_injectio...
http://www.britishv8.org/Articles/Rover-14CUX-EFI....
Keep the paper element air filter; an oiled cotton air "filter" is a waste of time.
I used the rubber bushes from Defender radiator mount for my HP fuel pump, you can just hear it run before starting the engine.
In the 21 years/ 100,000 miles I've owned the Bowler I've never felt the need for cruise control. Shouldn't be too tricky to retrofit though - the key is to ensure that clutch and brake pedal switches are present to kill cruise control in addition to the control binnacle.
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