Please check the Forum Guidelines at the top of the Newbie section
Heres a thought though When I swapped Bank 1 Sensor 1 with sensor 2 it brought up same faults but the codes where different it was 0141 rather than 0130 and 0135
Should this be right?
You need ecu, transponder ring from barrel and key from mates car...
Swap ecu with yours, remove cowling.
Unplug transponder ring and leave in place.
Tape mates key to his transponder ring and plug it in.
Use your key in the ignition.
Quicker and easier than stripping both cars.
I woukd however be inclined to fit your ecu to your mates car if that is working properly
Cheers I will do it that way sounds a lot handier
Must admit although rare, Ive had and come across ECU faults all on 3.2's, two of them being Ex Police, having said that they have all produced similar issues, which are fine one minute then decide to through a Non Start or Intermittent Start problem (which can lead you chasing your own backside thinking its a Crankshaft, Fuel Pump or immobilizer problem) rather than a Miss Fired issue that you are describing.
If your thinking its ECU related, first thing to check is the Earth return on the ECU, there's a jumper wire between the outer ECU casing which is one of the main Earth return, its held on with a 'all in one' terminated nut, make sure that's nice and tight, also check the Earth return between that point and the neg / ground or the battery, if you don't have a meter, you can put a jump lead between the ECU casing and Battery Negative (double check and don't put + volts on the ECU by mistake!!).
If you've got access to another 3.2 car, then yea, I would swop the ECU just to check, its a leas than 10 min job once you get the hang of it, unplug ECU and swop, Steering Wheel cowling off, unplug and pull off Immobiliser module and replace and swop the keyfob chip, just make sure you label everything up for each car as you go along.
Hopefully get a chance to swap them around start of next week he free to do so, just can't think what else could be causing this I will update soon as I can
thanks, Carl
Right guys, finally got round to getting a propper gm precat o2 sensor, it has been fitted but im still getting same symptoms which are very bad rough idle at startup when cold. And when its hot im getting an occasional missfire and car seems quite under powered. Ive checked all the wireing for burnt or cracked wires but it all seems fine. Im really at a loss now and any additional info would be greatly appreciated. Thanks to all again in advance. Dan
You've both got the standard 2.6/3.2 pre-cat problem.
Only cure is get pre cat sensor moved to after main cat (there's a guide) or fit modified 3.0L downpipes.
