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Hi i have a Ldv convoy with a 2.5 diesel engine.I am not sure what kind of engine but its a ford.Any way it starts first time ticks over but it will not rev.It has a flyby wire.Now i want to take the engine out for a project i have in mind but i want to make sure it runs ok before i do.I am going to use the wiring harness to. Thanks in advance
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Peace,Max signature height = 80px
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bl1300
Posted a lot
Posts: 1,678
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First question what year is the vehicle?
When you say it doesn't rev does the pedal do nothing at all or does it say rev to 2krpm and no higher?
If the former the problem is very likely related to the throttle position sensor if the latter then it could be any number of things triggering a limp home mode in the ECU.
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Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
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This is a transit 2.5DI in a LDV convoy, I don't think it has a limp home mode. All you get is "seems to be working, if a bit slow and noisy" and "Stopped, broken. call the AA"
I'm seriously impressed that they managed to implement fly by wire! My guess would be the accelerator pedal potentiometer, or the wiring between this and the ecu.
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Maybe even the brake light switch - are the lights stuck on or anything? do they work?
A lot of Drive by wire guff uses the brake pedal switch as a failsafe.
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Its a x reg. does not rev at all.Just ticks over.Silly question were is the sensor on the pedal and weres the ecu what does it look like.To modern for me.Thanks Very greatfull
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Peace,Max signature height = 80px
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bl1300
Posted a lot
Posts: 1,678
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Ok the pedal should feed into a potentiometer. Basicly a rotary input variable resitor. By its nature it has to be attached to the pedal. You should be able to find and trace the wires back to the ECU. Look for ropey wires and repair them if found.
The brake light switch will be in one of two places.
1. A spring loaded push/pull switch positioned in front of the break pedal so that the pedal return spring keeps it pressed when not using the brakes.
2. Some vehicles have a hydraulic pressure switch on the master cylinder look for two wires connected to a screw in union.
Either way to test the operation of the brake light switch, turn the ignition on. With the brake pedal fully released, one terminal should be live at battery voltage and the other should have negligable voltage registering. If both are live the switch has failed.
Then depress the brake pedal you should now get a live on both sides of the switch. If it doesn't the switch is faulty.
Ones you've ruled that out then look at replacing the accelerator potentiometer. However with all electrical problems do one thing at a time and retest. If you don't you wont know what fixed the problem or could make things a whole lot worse
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Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
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2. Some vehicles have a hydraulic pressure switch on the master cylinder look for two wires connected to a screw in union.
That isn't a brakelight switch - it's a failure warning switch. Dual circuit MCs often have them, it operates if one side of the circuit looses pressure and lights the brake warning lamp on the dashboard.
Old single circuit cars often have a hydraulic brakelight switch mounted on a t-piece in the brake lines, but this van won't, it will have a pedal switch.
Easiest way to test it is to turn the ignition on and press the brake, ask someone to tell you if your brakelights come on.
As to your actual problem, I'm going to have to ask someone for help, I'm not familiar with convoys parrticularly, but there is a taxi firm just up the lane from me that run late model LDV convoy minibuses, I'll ask their mechanic about it.
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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is it the Banana engine? didnt think they had a throttle pot unless they were Turbo'd.
I think around the X they started using the 2.4 which would be fly by wire (MK6 transit twincam TDDI engine)
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Will not rev BenzBoy
@benzboy
Club Retro Rides Member 7
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2. Some vehicles have a hydraulic pressure switch on the master cylinder look for two wires connected to a screw in union.That isn't a brakelight switch - it's a failure warning switch. Dual circuit MCs often have them, it operates if one side of the circuit looses pressure and lights the brake warning lamp on the dashboard. So bl1300 / Pauldaft44 / Automatic is back with his poor advice and wild stabs in the dark I see.  |
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bl1300
Posted a lot
Posts: 1,678
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2. Some vehicles have a hydraulic pressure switch on the master cylinder look for two wires connected to a screw in union.That isn't a brakelight switch - it's a failure warning switch. Dual circuit MCs often have them, Old single circuit cars often have a hydraulic brakelight switch mounted on a t-piece in the brake lines, but this van won't, it will have a pedal switch.[/qoute] Not all vehicles have the single line switched mounted in a t piece. I was thinking of the type with single circuit brakes. On my car the brake light switch is hydraulic and screws directly into the master cylinder and is dual circuit. This is why I gave instructions for both types as I don't know what type it has. Oh and proof that I do know what I'm talking about have a photo showing one!  |
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Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
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Yeah, but that's on a daf, not a LDV  I'd say that arrangment there is the exception to the rule IF that is what it is. Dual circuit cars usually have a mechanical switch not a pressure actuated one because you would need two switches, one for each circuit for it to work correctly. Think about it, if the side with the pressure switch fails you will have brakes (sort of) but no brakelights. |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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bl1300
Posted a lot
Posts: 1,678
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Yes but I did not say that was the arrangement I said it would either be a mechanical switch on the pedal or a hydraulic switch and as I have just shown you I have seen them fitted to the master and not knowing the exact specifics of this vehicle thought it best to alert to both systems.
Oh and the other thing that did come to mind is that LDV is Leyland DAF Vehicle so some DAF features could well be there.
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Last Edit: Jul 9, 2011 19:45:00 GMT by bl1300
Current fleet.
1967 DAF 44
1974 VW Beetle 1303s
1975 Triumph Spitfire MkIV
1988 VW LT45 Beavertail
1998 Volvo V70 2.5
1959 Fordson Dexta
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Look, don't take it personally, but the reason I pulled it up is that far from clarifying anything you introduced extra confusion that the OP doesn't need. If he tested the switch on the master cylinder using your description, he would have come to the conclusion that it was faulty when it isn't because it has been mis-identified and he'd be testing the wrong part.
And I don't think Leyland Daf Vans have any shared DNA with Daf cars. It's just the usual process of reusing old names (and it's basically a freight rover 300 anyway)
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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This is the said engine not sure which one it is.Theres no switch on the servo.I spoke to the last owner and he said it would start ok drive ok then there no power when you rev.Just ticks over.  |
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Peace,Max signature height = 80px
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That's definatly a DI of some sort rather than the later 2.4 TDDI, is it turboed? looks like it is...
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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don't thinks its a turbo not sure to modern for me.
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Peace,Max signature height = 80px
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well, if it isn't a turbo I can't work out why the air intake pipe heads for the exhaust.... can you take a picture of the engine from the passenger side?
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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I think its a turbo with fbw engine!!
either as said fbw is playing about or the egr is stuck open but that normally means bad starting, think on balance would go for pedal sensor
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Thats what i will try then thank you
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Peace,Max signature height = 80px
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Oh and the other thing that did come to mind is that LDV is Leyland DAF Vehicle so some DAF features could well be there. Thats right, after all this is an old 100% British Ex-BL Sherpa design, with a Ford transit engine, built in Birmingham, about 30 years after DAF stopped making cars, so you never know. ;D |
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1974 Lancia Beta Saloon
1975 Mazda 929 Coupé
1986 Mazda 929 Wagon
1979 Mazda 929 Hardtop
1982 Fiat Argenta 2.0 iniezione elettronica
1977 Toyota Carina TA14
1989 Subaru 1800 Wagon
1982 Hyundai Pony 1200TL 2-dr
1985 Hyundai Pony 1200 GL
1986 Maserati 425 Biturbo
1992 Rover 214 SEi 5-dr
2000 Rover 45 V6 Club
1994 Peugeot 205 'Junior' Diesel
1988 Volvo 760 Turbodiesel Saloon
1992 Talbot Express Autosleeper Rambler
2003 Renault Laguna SPEARS OR REAPERS
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I'd say that arrangment there is the exception to the rule IF that is what it is. Dual circuit cars usually have a mechanical switch not a pressure actuated one because you would need two switches, one for each circuit for it to work correctly. Think about it, if the side with the pressure switch fails you will have brakes (sort of) but no brakelights.
