SUDDEN ENGINE FAILURE

Post by **mickpd** » Sat May 15, 2004 9:17 pm

Can any of you techies help me with a problem? My engine suddenly dies without warning (dangerous at r/bouts,T junctions,etc). it will do it at any rpm,sometimes will cut in/out sparodically before stopping.It will then start ok with the key but problem still persistent.I tried this test.....Normal driving...Dip clutch...Engine dies 8/10 times. Fuel filter has been changed to no avail.I had it scanned and it showed up 19 faults!!!! These faults dont appear to show the cause of the problem.I had the car remapped recently.Could this have prompted a problem?.I cannot get the car back to *** tuning chaps.Has anyone had a similar problem?..Thanks for any help.

Post by **philipwalker** » Sun May 16, 2004 9:30 am

If the car was fine befor the re-map I would look at that...
19 fault codes?? clear them and go for a drive see which ones come back...
I would still look at recent work carried out.... earth straps on? ecus connected correctly, fuel pump relays and the like

Post by **mickpd** » Sun May 16, 2004 12:21 pm

Thanks for the reply and anything else that may be of help. I dont have access to the car at present due to working away from home.I will try your suggestions when i can get back.I have also been told to check for air leaks,but where are the most obvious places to look? If it is a simple problem to fix and i can do it myself,then it will save me a lot of hassle and a lot of miles to get the car back to the re-map lads,i.e,due to its condition/more damage occuring/potentially dangerous situations.Many thanks to you and anyone that can help.

Post by **sitas3** » Sun May 16, 2004 10:17 pm

dodgy fuel pump?? erratic MAF unit?

A suggestion: before you clear the codes, make sure you take a note of them (or use the copy feature in Vag-com if you have it)

hope you get it fixed - please let us know what the cause/solution is.

By the way, which remap did you choose? AMD or MTM?

Post by **mickpd** » Sun May 16, 2004 11:44 pm

I hope to get the fault codes tomorrow(mon).If so,i will post them hear and hopefully someone can point me in the right direction.I will let you know who did the remap after i have had the problem resolved and what their contribution was in solving it.After all,with their work and my loss of it due to time off if the car has to go back to them, will amount to over £4000-A lot to pay out for something i cannot use.I cannot point the finger at anyone yet though.The problem may not be related to the remap.

Post by **Nige_RS4** » Mon May 17, 2004 9:07 am

Did you get the map done via the serial port of via a soldered chip? It is highly unlikely a boost leak will cause the engine to cut out. More likely to be ecu-related, but could be something as simple as a battery connection, or as mentioned earlier, an earth strap. Does the ECL light come on before the engine stalls?

Hope you get it sorted

Post by **mickpd** » Mon May 17, 2004 1:09 pm

The car started ok this morning but stopped again after 2 mins.I didnt notice any lights.I have the fault codes,as follows....
17972 P1564
Throttle valve control unit-J338
low voltage at base setting
sporadic fault

17518 P1110
Bank2-Probe2,Heating element circuit
Short to Positive
sporadic fault

17548 P1140
17548/references

16522 P0138
Bank1-Probe2
Voltage too high
sporadic fault

17522 P1114
17522/references
sporadic fault

16705 P0321
Engine speed sender-G28
Implausible signal
sporadic fault

18010 P1602
Voltage supply K1.30
Voltage too low
sporadic fault

16684 P0300

Misfiring recognised

16688 P0304
Cyl.4
Misfiring rcognised

16690 P0306
Cyl.6
Misfirng recognised

16689 P0305
Cyl.5
Misfiring recognised

16685 P0301
Cyl.1
Misfiring recognised

16687 P0303
Cyl.3
Misfiring recognised

16686 P0302
Cyl.2
Misfiring recognised

16706 P0322
Engine speed sender-G28
No signal
sporadic fault

The next 4 faults were already there,and always show up,even before problem started...

18053 P1645
18053/references

18057 P1649
18057/references

sporadic fault

17931 P1523
17931/references

16955 P0571
Brake light switch-F
implausible

Who has got the knowledge to sort that lot out??? Thanks for making it to the bottom of the page.

Post by **sash** » Mon May 17, 2004 3:03 pm

if you have a 2.7 engine in your A4 then may be your ECU doesnt understand the values coming back from the sensors or thinks that there is a problem as the values are outside a specified range.

Post by **sitas3** » Mon May 17, 2004 3:40 pm

which car did the engine originally come out off? was it an S4 or A6? I didn't know that the Biturbo engine collected misfire counts like the 1.8T lump can!

Also did AMD remove the speed limiter?

Post by **toasty** » Mon May 17, 2004 4:01 pm

I reckon that looks quite bad. Sorry mate

What with all the sporadic faults, voltage too high/low and shorts to positive etc...

Is it possible that when fitting the engine that the loom got trapped and is rubbing on the bodywork or in some other way damaged?

Post by **mickpd** » Mon May 17, 2004 5:39 pm

The ecu is the original match for the 2.7 engine.Everything worked no probs for a year, up to recent remap??? The engine is supposedly out of the allroad and is only 2+half years old.I was told at time of remap that the speed limiter cannot be removed.The car is going back to tuners tomorrow on a transporter,£££££££££££s.Lets hope they can sort it out by wk/end.Got to catch a train(wot a f*****g p****r)now,cos i work away.I will keep ya updated at wk/end when i get back

Post by **Morpheous** » Mon May 17, 2004 9:21 pm

First things to check are lives and earths to ecu via relay, When this many faults are logged, something aint right as you are finding out.
Is everything connected correctly? no earth leads left dangling etc?
Start simple, its mostly the cause.
As its an allroad engine, it will have misfire detection as its later eu emission. But hey, its also restricted to prevent damage to the boxes on the A6. The S4 ecu wont work either as they have security built into it to prevent it being used on an A6, unless the tuners have found a way around this, dont know as not in the tuning game.
Engine speed sensor sounds a good place to start also, but you will need to scope the output. Could be bad connection or a duff sensor, few of these going down on S3 and TT, causes misfire then eventual non start.
Another fault logged is the brake light switch f, this sends a sig to ecu for engine and esp, probs with these also which will req change, the rest will look up and report when time.

Post by **mickpd** » Sat May 22, 2004 3:26 pm

I have just got the car back and thankfully,it is now running ok.The problem was eventually traced to a faulty flywheel sensor wire. Thanks for all your help.

Post by **Lewis** » Sat May 22, 2004 6:10 pm

All these electronics, great for simple tuning with nice new software, but a nightmare to trace faults.

Glad it's all good

I've only seen one advert for this transplant and quoted over 12K, but that was to put in a Corrado. If it's not a cheeky question was yours anywhere near this price?

Post by **mickpd** » Sat May 22, 2004 8:09 pm

I suppose if it was only the sensor and not the faulty wire that caused the problem then it would have been much easier to diagnose...I have not heard of this transplant being done before with such a relatively new engine and even my local Audi dealers were doubtful if it could be done at all.This made me all the more determined to succeed.I must say though,they,and many other parts suppliers,businesses,enthusiasts,etc have been very supportive and helpful to the completion of the project.The initial cost are 2002 engine 14k miles £2500:fwd gearbox £200:uprated suspension legs,drive shafts,etc £200/£300:various peripherals,guess at £500.The end result amounts to a massive grin from ear to ear....I now need sports seats and Porsche 993 front brakes.Any pointers anyone? Thanks

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SUDDEN ENGINE FAILURE

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