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Old 13th August 2019, 19:07   #1
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I have been given a 2 ltr petrol Cowley built75,

Recent new clutch, etc.

Engine starts first turn of the key, ticks over fine.

But when you start driving it drives like a Kangaroo It is as if you constantly put your foot up and down on the throttle pedal and won't go above 4k rpm.

It just surges, and when you then come to let it tick over it ticks over at about 2K and the revs go up and down.

Anyone any ideas ?? as I am more used to Diesel.

If it is a simple cure fine if not it goes to the Casse.
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Old 13th August 2019, 20:11   #2
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That's what is happening with mine. I think I've narrowed it down to the fuel feed pipe to the injectors. Mine wobbles from side to side and I'm sure it should be securely fastened. . . . just a sec, I'll check the pipe on my diesel. I'll get back to you
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Old 13th August 2019, 20:24   #3
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And of course there's no equivalent pipe on a diesel
But, I'm pretty sure the problem is a wobbly pipe intermittently cutting fuel to the injectors.
I'm waiting for a visit by MarinaBrian to change my timing belt and help with this other problem.
So check that pipe. It's the one in the middle. The other pipe nearest to the battery moves anyway.
Hope this goes some way to help
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Old 14th August 2019, 09:44   #4
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Quote:
Originally Posted by Number 6 View Post
I have been given a 2 ltr petrol Cowley built75 ...
That's nice.
Do you know the service history of this car John?
Quote:
... it drives like a Kangaroo It is as if you constantly put your foot up and down on the throttle pedal and won't go above 4k rpm.

It just surges, and when you then come to let it tick over it ticks over at about 2K and the revs go up and down.
I would have a look at the throttle cable to make sure that it's adjusted properly. The butterfly should be completely closed at idle because there's a separate air supply to the idle control valve. Next I would remove and clean the components of this valve. There's an inexpensive service kit available should you need it.

Also, remove the engine acoustic cover and check the cam cover breather tubes beneath. The T junction is usually where they break.

There are lots of KV6 owners here who do their own maintenance so no need to consider cold blooded murder of this poor old 2 litre.

Simon
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Old 14th August 2019, 12:10   #5
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Quote:
Originally Posted by SD1too View Post
That's nice.
Do you know the service history of this car John?

I would have a look at the throttle cable to make sure that it's adjusted properly. The butterfly should be completely closed at idle because there's a separate air supply to the idle control valve. Next, I would remove and clean the components of this valve. There's an inexpensive service kit available should you need it.

Also, remove the engine acoustic cover and check the cam cover breather tubes beneath. The T junction is usually where they break.

There are lots of KV6 owners here who do their own maintenance so no need to consider cold-blooded murder of this poor old 2 litre.

Simon
Hello Simon,

There is a "File " with the car but as yet I have not had spare time to read it all I know is it is a 2000 registered and fairly Basic spec When I get it back home I can sort the VIN number out and do a search.


The Lurching is consistent with you putting your foot on and off the throttle in quick succession..It will start up easily enough and did tick over well, But after trying to drive it the tick over went a little haywire

I will check out what you suggested and see what happens.

John Number 6.
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Old 14th August 2019, 12:42   #6
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Two Rover 620ti did that and took a while to ID the problem. Checking the engine idle whilst leaning over it, I briefly put my hand and some weight on the Throttle Position Sensor [ TPS ] and noticed a change in engine idle.

Long story short, it was the wires in the TPS Connector Plug which somehow had been stressed in previous ownership. Intermittent and poor electrical continuity. One of the reasons it was sold on.

Solved it by a quick visit to the local scrap yard and removed a TPS Plug and a length of its wires. Cut out the old one and soldered in the replacement onto the engine's sub-loom. Immediate cure.

A year or so later later bought another 620ti with same issue. Been there done that so again, immediate cure.

Maybe something a simple as that which is hard to tie down. There again, maybe not. Worth putting on the check list though. Let us know when the problem has been ID-ed and rectified. That way we all learn.
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Old 14th August 2019, 13:39   #7
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Two Rover 620ti did that and took a while to ID the problem. Checking the engine idle whilst leaning over it, I briefly put my hand and some weight on the Throttle Position Sensor [ TPS ] and noticed a change in engine idle.

Long story short, it was the wires in the TPS Connector Plug which somehow had been stressed in previous ownership. Intermittent and poor electrical continuity. One of the reasons it was sold on.

Solved it by a quick visit to the local scrap yard and removed a TPS Plug and a length of its wires. Cut out the old one and soldered in the replacement onto the engine's sub-loom. Immediate cure.

A year or so later later bought another 620ti with same issue. Been there done that so again, immediate cure.

Maybe something a simple as that which is hard to tie down. There again, maybe not. Worth putting on the checklist though. Let us know when the problem has been ID-ed and rectified. That way we all learn.
Thanks for the reply, As yet I have not looked at it closely but will investigate the points you have bought up..

One thing I have since learnt is that the instrument head has been changed and the replacement was from an unknown car on the display when you switch it on shows ride height and traction control I believe, As this car has neither fitted I wonder if this could upset the ECM and cause the problem.
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Old 14th August 2019, 16:50   #8
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Don't kill it yet.--Marinabrian might have the solution to that kind of problem.---
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Old 23rd August 2019, 20:16   #9
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Hi there John.

Have you come up with any solutions yet to the problems on your gift car ???

Even though your car is a diesel there are lots of compatible parts to keep if you do decide to scrap it.---
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Old 23rd August 2019, 21:26   #10
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Hi there John.

Have you come up with any solutions yet to the problems on your gift car ???

Even though your car is a diesel there are lots of compatible parts to keep if you do decide to scrap it.---
Well yes After cleaning all the various contacts in the engine compartment and the TPS the car runs absolutely fine,Smooth,quite and reasonble performance.

But I have a problem with the airbag light staying on which I am trying to cure,Hence the reason I have not updated what is happening.

And to be honest it would be criminal to scrap/break
it as the inside is perfect.
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