Corrie19996 months ago

Most of the tech in the car will eventually trickle down into lesser models, but until that happens, you'll need relatively deep pockets to experience the best Audi has to offer. We spent some time with a pair of Audi's latest A8s (one diesel, one gasoline) and the faster, more expensive S8 on some of Colorado's finer highways and byways recently, and we think they might be the ultimate Ars car.

Matchmaker15 months ago

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Pete_W4 months ago

The support I have received from Pico over the years has been superb. The regular software and driver updates are a real bonus.

petHead4 months ago

I was very impressed as to the speed and ease of ordering. Not having ordered on the internet before i didn’t struggle at all. The product is excellent.

MDG Ltd4 months ago

As you may expect the drivers clutch pedal is connected to the clutch fork via the clutch cable which pulls the clutch fork when the clutch pedal is operated. This forces the clutch thrust bearing against the clutch diaphragm allowing the clutch plate to spin freely disconnecting drive to the gearbox

Bri19874 months ago

From this data we could identify that the problem was with cylinder 4’s injector, and that there was some kind of resistance preventing the full voltage from getting to the injector. We decided to strip back and remove the wiring protector to have a closer look at the wiring harness and take note of any breaks, short circuits or obvious problems.

Watergirl4 months ago

What does fault code P284A mean for 2001 Audi A8 ? What does a diagnostic reading P284A mean for 2001 Audi A8 ? How to fix OBD2 Code P284A for 2001 Audi A8 ? What do we know about P284A code for 2001 Audi A8 ?

Bri19874 months ago

i dont understand how the dtcs logged just because of the changeover from petrol to lpg only affected cylinders in bank 2 and why long term fuel trim is affected

Fireboy4 months ago

I guess you have just mistyped something in the article. You have written :-   *  Channel A (red trace) to the Injector Cylinder 3 Signal Wire Using the Acupuncture Probe   * Channel B (blue trace) to the Injector Cylinder 4 Signal Wire Using the Acupuncture Probe   * Channel C (green trace) to the Injector Cylinder 3 Signal Wire Using the Amps Clamp   * Channel D (yellow trace) to the Injector Cylinder 4 Signal Wire Using the Amps Clamp

petHead4 months ago

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Gary19964 months ago

In order not to be handicapped by the added weight of the extra mechanical bits, the chassis of the A8 was built from aluminum, saving several hundred pounds over an equivalently stiff steel version (a front-wheel drive V6 model was also available in some markets). A sportier version with a more powerful engine, the S8, debuted in 1996 and went on to star alongside Robert De Niro in the John Frankenheimer film Ronin.

MDG Ltd4 months ago

What does fault code P284E mean for 2008 Audi A8 ? What does a diagnostic reading P284E mean for 2008 Audi A8 ? How to fix OBD2 Code P284E for 2008 Audi A8 ? What do we know about P284E code for 2008 Audi A8 ?

Fionas_Boy4 months ago

Generally, coolant loss is the most common cause of overheating. If your engine overheats repeatedly, the high temperature could result in irreparable damage that can be a pain to repair. Prevention is the best medicine, so avoid this kind of damage by making sure the coolant is clean and the cooling system is in good operating condition.

Watergirl4 months ago

1) Was the PCM in catalytic convertor protection mode by disabling the #4 injector driver as seen in scope 2 view? It almost has to have been since your 4 volts wasn’t being pulled low. The first thing I would have done is go to the B+ side of the injector to make sure the supply is there. If it was still low (4V), then I’d work upstream from that test point.

Fireboy4 months ago

The multi-plug was stripped down and the terminal pins were replaced and refitted to the injector. The entire wiring harness protector was built up again and the engine no longer misfired.

Fionas_Boy4 months ago

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Col Minessota4 months ago

Sheffield clutch replacement for Focus, Mondeo, Ka, Vectra, Astra, A4, A3, TT, A8, Yaris, Celica, Jazz, Civic, Clio, Megane, v70, s60, xc90, Transit, Discovery, Punto, Polo, Passat, 911, 325, 323, 525, 520 and many more

Bri19874 months ago

Was this to allow you to pick up the small voltage spikes on Inj 4, were you expecting to see the spikes?

Corrie19994 months ago

The first 3 codes concern general misfire and fuelling. These are probably due to the engine switching from Petrol to LPG and back.

Bri19874 months ago

If you need your clutch replacing or clutch repairs most local garages now repair and replace faulty clutches. But if you need a clutch specialist we are always happy to help. Just get your car to us and we'll do the rest. Our clutch replacement customers usually come from the local areas below. If your Sheffield area is not listed please get in touch.

MDG Ltd4 months ago

Fantastic products and support with unbelievable performance for the money.

petHead4 months ago

From the ‘16588’ error code, there seems to be an issue with one of the injectors in the circuit on cylinder 4. At this point we cannot determine whether this is due to the LPG switching, so we carried out a quick test. Using the Fuse Adaptor and a current clamp we can see if all the injectors are drawing even current, if any were poor or even absent.

Porker4 months ago

I have a few questions myself if you don’t mind.

R2_Amazeballs4 months ago

One more check was carried out, which was to switch to the LPG system from the standard fuel system. As the LPG requires the ignition system, if all 8 cylinders fired correctly it would have proved that issue lay with the fuel injector.

Porker4 months ago

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R2_Amazeballs4 months ago

Audi entered this particular market in 1994 with the first-generation A8 (although the car only arrived in the US several years later). That car also signaled the company's intent to push the boundaries of road car technology. The A8 was all-wheel drive (AWD), in keeping with Audi's philosophy, when every other contender to the crown just drove the rear wheels.

FordOwner4 months ago

We found slight breaks in the wiring insulation (possibly from previous testing) which might indicate that this was a previously investigated problem. However, these breaks were not sufficient to short to any earth wire or earth point and there were no other breaks within the wiring. From this we were able to determine that the problem was not occurring from these breaks.

Porker4 months ago

The Audi A8 is designed with a sophisticated system that allows one or more cylinders to be deactivated in the event of a continuous misfire.

Red4 months ago

Audi A8 clutch fork fault

With the ‘Variation’ data enabled, PicoDiagnostics shows that each cylinder can produce a high amount of mechanical power (represented by the blue line). The above screen capture indicates that while cylinder H is mechanically OK, it does have an intermittent misfire. Further investigation is required into the surrounding components which supply the cylinder.

R2_Amazeballs4 months ago

Supply and fitting of replacement clutches for classic, rare and modern cars and also light commercial vans.

Red4 months ago

3) Why is channel C and D in AC coupling mode? Are you trying to reduce noise from your low current probe with this method instead of deploying a filter?

Watergirl4 months ago

A 2003 Audi A8 was having a problem with rough running which in turn was causing the engine management light to illuminate.

MDG Ltd4 months ago

While most new car clutch linkages are self-adjusting, there are some tell-tale signs that will tell you if adjustment or replacement is required. For instance, if the clutch engages and disengages and the pedal is close to the floor of the car or the transmission "grinds" when changing gear, your clutch probably needs attention. For a free clutch check or a free quote telephone us on: 0114 2363617

Fireboy4 months ago

All around a great article, I always learn a lot from these.

Fionas_Boy4 months ago

We knew that we were currently firing on only 7 cylinders and so, before switching to LPG, we must switch off the ignition and restart the engine. Upon restarting the engine and switching to LPG, all 8 cylinders began to fire successfully. This confirmed what we had already suspected: that both mechanical power and spark were present.

Corrie19994 months ago

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Fionas_Boy4 months ago

We assumed that the first 3 DTCs were due to the engine switching from Petrol to LPG and back. This is because these codes are general misfire and fuelling codes, which aren’t relevant to the fault under investigation. The PicoDiagnostics software backs up our theory.

Porker4 months ago

From here it was obvious that we would need to use the PicoScope Automotive software and begin running tests on the cylinder 4 injector. At this point it made sense to use cylinder 3 as a benchmark for comparison to determine if a difference could be seen, or more importantly if there was a fault with the injector or the wiring harness.

Red4 months ago

Nice piece of detective work, it raises a couple of questions for me though.

Fireboy4 months ago

What benefits do you perceive from using a dual scope view in this particular instance?

Matchmaker13 months ago
This problem has been solved

- see solution here