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1

Omega General Help / Would a failing/failed rev counter cause the Auto Transmission Check light?

« on: 11 September 2016, 23:38:52 »

Hi guys,

Progressing with my bad rev counter issues.

Now it does not work from cold for about 20 mins and then starts to jump around.

Could a bad rev counter in the dashboard be the cause and could this cause the Auto transmission check light to come on that is happening to the car?

I have taken the dashboard/dials section out etc with the guide, then put it back, no change. So i can replace if that is the issue.

What do you think?

Thanks

Alex

2

Omega General Help / How to test if the radiator cooling fans are not working with air con TD?

« on: 10 September 2016, 09:52:46 »

Hi all,

The cooling fan did not come on with the air con today so it was not cool.

Is there a way to check if the motor of the fans are ok or burned out? It worked fine yesterday.

Does the TD have a specific 2 radiator fans or is it the same as other 2 fan Omegas?

Thanks

Alex

3

Omega General Help / No rev counter movement on my TD, changed crankshaft sensor, no change,no codes

« on: 09 September 2016, 23:19:44 »

Hi all,

The jumping rev counter saga has moved onto no movement on the rev counter for the first 5 minutes of the engine being on.

Here are the facts

- Rev counter was erratic (1-2 months now) and would cause the auto gearbox to go into 3rd gear limp mode
- Changed the crankshaft sensor but still the same
- The cable coming out of the wiring loom looks fine i.e no cuts or melting or anything like that, inside the bigger loom cannot say as it is hidden.
- The rev counter can be totally fine at times and not work at all at others
- Today it would not move for 5 minutes of the engine on, then was erratic and then fine
- There are no codes with the paperclip test

What else can I try please anyone? Could the rev counter wiring/motor etc behind the dash be the cause? Would an error here cause the gearbox to go into limp mode/have the symptoms described above?

If it could be the rev counter in the dash then how do I remove it to look at it please?

Thanks all.

Alex

4

Omega General Help / 2.5TD Code 44 - Incorrect boost pressure - Intermittent fault

« on: 29 August 2016, 22:21:35 »

Hi all,

OK after learning how to do the paperclip test I am closer to finding out what is going on with my jumping rev counter that upsets the Auto transmission and puts it into limp mode occasionally.

I got code 44 immediately after this happened most recently. I turned off, restarted and it was fine again so looking for ideas on what to check please.

Is there a sensor or area I should take a look at to see if its loose/dirty etc.

Can anyone point me in the right direction please?

Thanks

Alex

5

Omega General Help / Re: Question about codes stored when using the paperclip test

« on: 19 August 2016, 22:15:25 »

Anybody know for sure?

Thanks

6

Omega General Help / Question about codes stored when using the paperclip test

« on: 19 August 2016, 13:52:25 »

Hi all,

Got a question re the codes stored on the ECU that can be read with the paperclip test.

Lets say the engine management/warning light comes on when you are driving and then the car is parked and cooled etc.

Then you go for another drive on a different day and no light comes on and no problems.
If you read the code after the no light journey then will the code that caused the Engine light to come on the day before be shown? Or will it not be shown because the latest journey did not have a light on?

If the engine light comes on should you check the code immediately with the paperclip to find out what it is then?

Thanks

Alex

7

Omega General Help / Reading the paperclip code for 2.5TD - abit of help please

« on: 18 August 2016, 17:09:36 »

Hi all,

I have tried to read the code on my TD and got the following flashes but I'm not sure how to put it together.

So it starts

Flash - pause - Flash, Flash

This repeats 2 more times for a total of three times of that code, then it changes to a new code.

Flash, Flash, Flash, Flash  (4)
Short pause
Flash, Flash, Flash, Flash (4)
 
Then a long pause where I think it is showing the same code again so it repeats 2 more times

Then it goes back to the top, can anyone tell me what this means please?

Does it mean code 44 for the second code? Unsure what the first code means.

Thanks all

8

Omega General Help / Re: Jumping rev counter 1998 2.5TD Auto

« on: 18 August 2016, 08:16:23 »

OK I replaced the Crankshaft Sensor and no change guys.

After max 30-60 mins the revs can start jumping and then it just gets worse until the revs fall to zero and the Automatic Transmission Fault kicks in.

TheBoy, you said you think it could be a wiring issue, it does seem (can't be sure) to start after going over bumpy roads and then it just gets worse.

I can see that the wire for the crankshaft sensor goes back into a bigger wiring loom and that is still wrapped together etc.

Shall I try to zip tie the wire to the wiring loom more securely/stop the sensor wire moving when going over bumps? Any other ideas please?

Thanks all

9

Omega General Help / Re: Jumping rev counter 1998 2.5TD Auto

« on: 04 August 2016, 15:50:54 »

OK my sensor just arrived and it has a cable attached to it, not removable and it has a 3 pin connection. I take it this is not correct?

Thanks

10

Omega General Help / Re: Jumping rev counter 1998 2.5TD Auto

« on: 02 August 2016, 11:56:25 »

Thanks guys,

I will see what I can see when the part arrives.

Great picture btw, I think I can see the bit you mean, under the starter and then the other end of the cable must connect somewhere too but I will just follow the cable back and see.

Fingers crossed this solves it.

I will report back when I have had a go.

Thanks

Alex

11

Omega General Help / Re: Jumping rev counter 1998 2.5TD Auto

« on: 01 August 2016, 14:25:59 »

Thanks Kevin,

I have ordered another Crankshaft position sensor.

I went under the car the other day (forgot to take a picture damn) but there is a sensor that seems to be clipped to the starter motor and goes to the transmission. Is this the Crankshaft sensor and cable? I didn't take it out or disconnect as I was unsure.

Thanks very much in advance.

Alex

12

Omega General Help / Re: Jumping rev counter 1998 2.5TD Auto - Creates "Automatic Transmission Fault"

« on: 31 July 2016, 17:45:33 »

Hi all,

Getting a bit more serious now.

When the rev jumps around abit and then sits on 0 even when moving (should be around 2000rpm lets say) it causes the "Automatic Transmission Fault" check light to come on on the Display. I then stop, turn the engine off and on again and it clears but I want to get it solved.

Is it likely to be a failing crankshaft sensor? If so is there a guide or images of where this is and how to change it etc? I saw a Post where TheBoy says

http://oldsite.omegaowners.com/forum/YaBB.pl?num=1246733913


"crank sensor on TD is under starter motor. Never known one to fail.  The sensor has a connector on it, might be worth giving that a clean, as that tractor blood tends to get everywhere."

Any pics or guidance of how to replace it and where it is?

Thanks as always all.

Alex

13

Omega General Help / Jumping rev counter 1998 2.5TD Auto

« on: 18 July 2016, 21:46:36 »

Hi all,

I have a jumping rev counter on my 1998 2.5TD Auto. Mostly it is fine but sometimes it just jumps around from 0 - max etc.

Is this likely to be a crankshaft sensor failing?

Is there a way I can test this and is there a guide/images anywhere on how to replace it?

Thanks

Alex

14

Omega General Help / Changing the coolant temperature sensor next to the rad, 2.5TD engine

« on: 17 June 2016, 13:27:49 »

Hi guys,

I think my coolant temperature sensor connected to the rad, under the top coolant hose is faulty, as it just turns the fans onto their low setting even when the engine is cold.

So my question is, it looks like I just need an appropriately sized spanner/adjustable wrench to unscrew the sensor, guessing water will come out and then put the new sensor in, screw it back in and then job done.

I will remove the top hose before I do this as it is in the way currently, then I can change the coolant at the same time so it will all be done.

Is the above plan correct? Or do I need to do anything else?

Thanks very much TD owners.

15

Omega General Help / Re: 2.5TD cooling fan always on, relay or switch?

« on: 17 June 2016, 13:16:26 »

OK thanks very much.

I can get another one for £10 so seems ok.

Thanks