The ‘dodgy wiring’ whisperer strikes again! Genius work!
@keithgarland3404
9 ай бұрын
Pity you didn't remember about the oil switch earlier, I have never heard that before. But running now, I was never a big fan of the thermostatic chokes, we had a lot of trouble with them on ford escort, sierra, cvh engines. People used to put manual chokes on them, I've had a p5b and a discovery V8, possibly because I'm British, I cant understand swapping s.u. carbs, for a holley. Probably as easy to fit the rover V8 fuel injection. Keep up the good work 👍
@BritannicaRestorations
9 ай бұрын
I have heard the Holley is not as good as the Webber for the V8
@sanatandharma4435
10 ай бұрын
I remember my father cussing about this switch when his V8-S would not start outside a shop, he got out of the car lifted the bonnet his arm disappeared down into the engine, then it started! My own SD1 cut out on the motorway one day and the AA came out and bypassed the switch! I bought a Ford Granada after that!
@BritannicaRestorations
10 ай бұрын
I think a lot of these 3.5 V8's have all but disappeared in cars and Land Rovers. Enthusiasts will probably know of this issue, but I had quite forgotten about it
@jamescaron6465
10 ай бұрын
Yes, you are right I never would’ve guessed. You did a hell of a job on that one.
@Bluepilchard
5 ай бұрын
Had this happen on a forward 101control started to be intermittent oil switch disconnected it and wham off we go changed it when it started years later to weeping a bit of oil for a new one but
@jameskerr5756
10 ай бұрын
Excellent bit of detective work Mike. I didn't know about the fuel pump being linked to the oil pressure switch. Fortunately mine is still good but first place I'll check if and when.
@BritannicaRestorations
10 ай бұрын
Would have helped if I would find a wiring diagram for it!
@jonjones1290
9 ай бұрын
Brilliant working through logically.....not to mention your knowledge of how the V8 oil pressure switch is used as a 'damage limitation device'!
@BritannicaRestorations
9 ай бұрын
Thanks for that!
@mpfrias
10 ай бұрын
Excellent. I had a similar problem on the 101 FC V8 twin carb. The military redudant systems installs a 3 way oil pressure valve wich woun't let the pump work if there is no oil pressure, except on first start that fuel pump works directly from ignition. Those valve switches use to fail often and sometimes we want to start the engine and there is no run.
@badfinger61
10 ай бұрын
I've always said Mike is incredibly "switched" on...
@Peter-xm6ve
10 ай бұрын
On the ball early bird 👍👍
@rogersleep
10 ай бұрын
Mike your brilliant a dying breed
@BritannicaRestorations
10 ай бұрын
I try my best!
@Reaper4367
10 ай бұрын
ooooh. Now i have to go back to the old Rangey (range rover) V8 that im looking at buying. It wouldnt start either. You are brilliant Mr Mike! Cheers for sharing.
@BritannicaRestorations
10 ай бұрын
Go for it!
@jonatday
9 ай бұрын
The101fc has a system to allow the enemy to get you, just what you need when you are trying to drive off in a hurry when you are getting shot at!
@ianbooth1290
10 ай бұрын
If it's the same as my v8 sd1 - when the car is cranking it turns pump on. When started it allows pump to work when oil pressure is good via that switch.
@BritannicaRestorations
10 ай бұрын
Do you happen to have a wiring diagram for the SD1?
@ianbooth1290
10 ай бұрын
@@BritannicaRestorations yes I have one. Will get it over to you
@thechod
10 ай бұрын
A far cry from the disco 2 set up 😂
@nigeljohnson505
10 ай бұрын
Rolls-Royce Shadows and Spirits along with Jaguar has the same idea but with a different switch.
@barrymcgrath5249
10 ай бұрын
That beggar caught me out before now
@thelaughingprophet2275
10 ай бұрын
Lucas, prince of darkness…..my diesel Perentie reversing lights are linked to oil pressure sender also…must have been an old bugger with oil pressure fixations heading up the wiring department for a few decades…..
@jacqueshickley
10 ай бұрын
Never knew about this. Would my 1984 V8 have this. And would it affect staring when hot? Mine always struggled after standing for 20 or so minutes. Anyway I prefer my 300Tdi. Thanks again for the great video Mike.
@BritannicaRestorations
10 ай бұрын
Most likely
@sidecarbod1441
9 ай бұрын
Are you running a square bore four barrel carb? (Edelbrock or Holley), if so your problem is probably down to the fuel boiling in the carb when you switch the hot engine off. What happens is that the fuel boils but the vaporised fuel is heavier than the air in the manifold, so the fuel vapour 'pours' into the manifold and when it eventually cools down it turns back into liquid fuel, this floods the engine. (Hence black smoke when it does start). The cure is a proper insulator between the carb and the manifold. (Not one of those crappy ones made of several sheets of thin aluminium and base gaskets).
@trickster8635
10 ай бұрын
Regardless of choke butterfly open or close, you should still get the engine to kick on fuel provided by the accelerator pump stroke. I reckon the oil pressure switch circuit has also been used to kill the ignition and the fuel pump, therefore no start regardless of fuel or not.
@BritannicaRestorations
10 ай бұрын
Just the fuel
@alexmos3344
8 ай бұрын
Excellent Mike! Is this for all defender V8 carb? Because I asked my mechanic and he said that the oil pressure switch has nothing to do with the fuel pump. Also if we disconnect the oil press switch the engine will start up normally. I will ask my electrician and see. I am asking because if I havent move the car for a few days it takes few seconds to fire up with choke on and thought if the switch is not working properly. When ignition is on I hear the fuel pump though normally.
@BritannicaRestorations
8 ай бұрын
On the carb engines, the oil pressure switch cuts the fuel pump if there is no oil pressure
@betterbackwards2701
10 ай бұрын
Same switch on Honda generators. Probably metric though.
@BritannicaRestorations
10 ай бұрын
Yes same idea
@DietrichLopan
10 ай бұрын
Do you still have that Disco 1 in your yard? Perhaps it has the same oil pressure switch that you could salvage.
@BritannicaRestorations
10 ай бұрын
Will be here tomorrow www.amazon.ca/gp/aw/d/B0066SL9MS?ref=ppx_pt2_mob_b_prod_image
@DietrichLopan
10 ай бұрын
@@BritannicaRestorations Indeed an easy part to get
@BritannicaRestorations
10 ай бұрын
There must be a lot of problems with them!
@paulboon1100
9 ай бұрын
Wow! One coold look for ages trying to figure out why no fuel of you didnt know the system!? Clever safety system but you got to know that one.
@BritannicaRestorations
9 ай бұрын
Exactly!
@BrianM0OAB
10 ай бұрын
I wonder if that also applies to 3.9efi ?
@BritannicaRestorations
10 ай бұрын
Not sure
@BrianM0OAB
10 ай бұрын
@@BritannicaRestorations Worth keeping in mind if it does'nt start.
@jonatday
9 ай бұрын
3.9efi has a delayed injection on start built in to allow oil pressure to build up
@BrianM0OAB
9 ай бұрын
@@jonatday Nice to know, thanks.
@stevedangerous1
10 ай бұрын
With a capital A, what an Arse😂 Like you thinking..
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