Sunday, June 10, 2012 - 10:37 am, by: Matt Koch(Gorilla1uz)
Hello all. Was driving along on Friday with the cruise control set on 105, when the car just went clunk, threw an engine electrical error and started using a heap of fuel. My guess is that it has gone into limp home mode, as it seems to be running full rich (terrible mileage on the emv & black smoke out the exhaust), and the only way to get anything other than 3rd is to manual shift it. Been playing around with it yesterday and found that
1.Disconnecting the AFM does nothing to improve the situation.
2.Had leaking C507 in the ECU, replaced it to no improvement. (Does anyone have a circuit diagram for the ECU, so that I can check that my soldering job worked and that there aren't any other faults?)
3.I ran E1 TC diagnostic and got TRC 51 and ECU OK. Air Bag & A/D lights were flashing on the dash and TRC light stays on.
4.Also ran E1 TE1 diagnostic and got EFI 13 with the white square next to it flashing every 5 or so seconds, and ECT NG without a code. Running the same diagnostic with the engine running gives me EFI NG and ECT NG both without codes.
5.On all diagnostics the EMV says ECU OK.
6.When it is cold it stalls for the first 2 starts, and runs rough on the throttle, like a carby car does without the choke when cold. At when idling though it is smooth as it has ever been.
7.Tried the Fuel pump ECU bypass to no improvement
8.Had battery disconnected for couple of hours to reset computers, no improvement.
I have searched around extensively, and found that fault codes are pointing towards ABS pump or cam one tooth out. Would any of these things prompt the car to go into Limp home though. Is there a bypass that can be performed to verify that these could be the problem before I pull everything apart?
Sorry for being so long winded, thanks for reading and in advance for any help
Sunday, June 10, 2012 - 03:29 pm, by: Peter Williams(Skeeta)
Yes, it's in limp home mode, and it is probably the main ECU, (under passenger's feet). If you can borrow a good one to swap out yours is the easiest way to confirm.
Sunday, June 10, 2012 - 04:21 pm, by: Matt Koch(Gorilla1uz)
Cheers, I'll give that a try. I've been digging a little deeper today and found both ignition rotors have cracks in them. They are both cracked in the same spot, from one of the retaining bolts to outer edge, and on top right where the copper electrode enters the rotor. Is a bit weird, as they are both identical to look at. Needed doing as they have severe corrosion in there anyway. Needs a bit of time and maintenance I reckon. Idle was smooth though, so not entirely convinced that this is the culprit.
Dan McColl Goo Roo Victoria (The Nazi State) Pretty Red Thing and The Black Rattler
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