Stranded in Ukraine

Dave Corbett · Sep 8, 2008

Hi, I posted a question a few minutes ago, but it disappeared (similar to the usability of me RR). Anyhow, I also posted a question last week regarding my Range Rovers problem of the jumping Rev counter which I had previously been informed (twice) that this was defiantly an Alternator Failure. So I duly replaced the original twice with two new Alternators and no long term fix to the problem.

Anyhow, the car was taken to a local Auto Electrician last Friday (in Kiev) who advised that I had an earth fault on the Alarm system which had drained the battery. This was easily fixed by the guy. Then he said I needed two new lamber Sensors, which were also duly purchased and installed. He then advised that my two month old plugs need replacing due to the poor Air/Fuel mis from the bad Lamber Sensors. He also advised that my Ignition leads are very poor and should also be replaced. So the Leads and plugs were purchased from the Kiev Land rover dealer and the intention was to install them this morning. Unfortunately, one of my extremely helpful assistants decided to surprise me and change them for me on Friday evening so that I could go on a planned trip Saturday morning. I say unfortunately, because he managed to get it all wrong, so now I have two problems instead of one:

1. The first problem is probably the easiest to fix if someone can tell me the connection sequence to the Ignition Coils on a 2000 model 4.6 Ltr Vogue. This is a Bosch system with two Ignition Coil block at the back of the Engine with 4 connectors on each block (2 upper and 2 lower)

2. Second Problem is the Auto Electrician has told me that the fluctuating Rev Counter could be as a result of the poor leads or an earth fault somewhere??? Has anyone got any ideas of what could be causing this Rev Counter problem other than a faulty Alternator???

Thanks for any help with these problems

Dave

javars · Sep 8, 2008

Dave Corbett said:
Hi, I posted a question a few minutes ago, but it disappeared (similar to the usability of me RR). Anyhow, I also posted a question last week regarding my Range Rovers problem of the jumping Rev counter which I had previously been informed (twice) that this was defiantly an Alternator Failure. So I duly replaced the original twice with two new Alternators and no long term fix to the problem.

Anyhow, the car was taken to a local Auto Electrician last Friday (in Kiev) who advised that I had an earth fault on the Alarm system which had drained the battery. This was easily fixed by the guy. Then he said I needed two new lamber Sensors, which were also duly purchased and installed. He then advised that my two month old plugs need replacing due to the poor Air/Fuel mis from the bad Lamber Sensors. He also advised that my Ignition leads are very poor and should also be replaced. So the Leads and plugs were purchased from the Kiev Land rover dealer and the intention was to install them this morning. Unfortunately, one of my extremely helpful assistants decided to surprise me and change them for me on Friday evening so that I could go on a planned trip Saturday morning. I say unfortunately, because he managed to get it all wrong, so now I have two problems instead of one:

1. The first problem is probably the easiest to fix if someone can tell me the connection sequence to the Ignition Coils on a 2000 model 4.6 Ltr Vogue. This is a Bosch system with two Ignition Coil block at the back of the Engine with 4 connectors on each block (2 upper and 2 lower)

2. Second Problem is the Auto Electrician has told me that the fluctuating Rev Counter could be as a result of the poor leads or an earth fault somewhere??? Has anyone got any ideas of what could be causing this Rev Counter problem other than a faulty Alternator???

Thanks for any help with these problems

Dave

Re Rev counter, I had a similar problem with a Lancia which after months of head scratching turned out to be the crank position sensor, having said that, not sure if you have one as Ive got an oil burner !

bwarb · Sep 8, 2008

Dave Corbett said:
Hi, I posted a question a few minutes ago, but it disappeared (similar to the usability of me RR). Anyhow, I also posted a question last week regarding my Range Rovers problem of the jumping Rev counter which I had previously been informed (twice) that this was defiantly an Alternator Failure. So I duly replaced the original twice with two new Alternators and no long term fix to the problem.
.
.
2. Second Problem is the Auto Electrician has told me that the fluctuating Rev Counter could be as a result of the poor leads or an earth fault somewhere??? Has anyone got any ideas of what could be causing this Rev Counter problem other than a faulty Alternator???

Not entirely sure what people think the link is between the tachometer and the alternator, as tacho's on "modern" cars are normally driven by the engine ECU.

I've just checked the P38 manual and the following seems applicable:

"Tachometer

The tachometer will display the engine speed in R.P.M. It will derive the engine speed from the engine speed pulse train transmitted from the Engine Control Module (ECM) (Z132). The pulse rate for petrol engines will be 4 pulses per engine revolution. The pulse rate for diesel engines will be 3 pulses per engine revolution."

For the tacho to read incorrectly, there are a limited number of things that could cause it:

(a) Duff tacho head itself - Possible
(b) Duff output signal from ECU - Very unlikely
(c) Bad wiring between the ECU and the tacho - Possible
(d) Bad power/earth feed to tacho head - Possible
(e) Electrical noise screwing with the tacho signal from the ECU - Possible

I would check all of those out ..... my money is on a duff tacho head or electrical noise issues (possibly generated by the alternator)......

Actually, if the tacho jumps all the time, you can eliminate the alternator by disconnecting it before you start the engine and then seeing if the tacho still jumps ?

Dave Corbett · Sep 9, 2008

Thanks you bwarb, I will check this out. But some answers to your suggestions, The Tacho doesn't jump all the time, it hapens only when the Engine is hot (usually on a long journey after about 1 or 2 hours from starting), and normally it happens when I put my foot down a little too heavily.

From what the P38 manual says about the ECU regarding Electrical noise, with faulty or failing HT leads a heavy foot when the engine is at temperature the leads could be breaking down causing such Electrical noise. So this could br the reason also. I will get the other things that you suggest are possible checked as soon as I can.

The good news is that some very nice people at Newbury 4x4 centre were able to assist over the phone with describing the Schematic for the HT lead connections. So I fixed that this morning, so thank you Newbury 4x4 Centre.

If anyone should ever encounter the same problem, I have attached a simple Schematic for the HT spark plug to ignition coil connections for future reference.

bwarb · Sep 9, 2008

Dave Corbett said:
The Tacho doesn't jump all the time, it hapens only when the Engine is hot (usually on a long journey after about 1 or 2 hours from starting), and normally it happens when I put my foot down a little too heavily.

From what the P38 manual says about the ECU regarding Electrical noise, with faulty or failing HT leads a heavy foot when the engine is at temperature the leads could be breaking down causing such Electrical noise.

Now you have supplied a little more info showing that the tacho spikes are related to engine load on a hot engine, I would definitely go with electrical noise from the HT leads causing the problem. You will probably find that the engine is misfiring at the same time but maybe too slight to be obvious ......

Dave Corbett · Sep 11, 2008

Thanks again Bwarb, The leads are changed and everything set. I am travelling to Odessa again tomorrow, so I will let you know the outcome.

Still having a problem with the AirCon dropping out intermittently This is an annoying problem as it has already cost a fortune in Gas, new condenser, a couple of sensors and a number of man-hours of labour to tell me that it is broken. I am starting to wonder if it is wear on the pulley and I need to shim it. I also understand there is a Land Rover fix by installing an additional cable Dave

Stranded in Ukraine

Dave Corbett

New Member

javars

Active Member

bwarb

New Member

Dave Corbett

New Member

Attachments

bwarb

New Member

Dave Corbett

New Member

Similar threads