Rough idle on warm start.

[ainarssems]

I am sending e-mail in PM, will take a look later as I am leaving house shortly.

[graynada]

Email on its way. Many thanks any help greatly appreciated.

[ainarssems]

I have imported logs in excel and made graphs in the attached file. Click through the sheets to see graphs.

Looks that lambda 1 stops working after the while or gets very lean on that bank.

Bank 2 is running very rich at start, could be that because of blocked exhaust that side is not breathing properly and getting less air in cylinders and because of that bank 1 is getting more then half of the airflow which could result in lean and therefore lambda stops responding in that side.

You need to sort out exhaust first then do another log. Or drop exhaust and do the log without exhaust if you don't feel like spending money before definitely identifying faults.

[graynada]

Thanks for that I think I'm going to need an exhaust anyway so that looks like the best option, get that done and see where we are.

[ainarssems]

There is a good chance one of catalysts have fractured and a piece is blocking exhaust.

[graynada]

Ok so now I have new exhaust, new cats and one new lambda sensor, second to be got tomorrow, and the I think the log is looking healthier, which is more of a question than a statement

And uploads are working for me

[ainarssems]

It does look slightly better. Lambda adjustment should be -12.5..+12.5% and lambda voltage -0.17..+0.9V so it is almost there but both lambdas stop responding sometimes, mostly bank1. Looks like intermittent fault somewhere. Could be wiring, sticking injector, spark plug, coil pack, ignition amplifier, idle air control valve sticking, sticking fuel pressure regulator, faulty cambelt tensioner shock absorber ect. Hard to troubleshoot from distance

Is there any fault codes?

You might want to do basic setting and check measuring block 10.

[ainarssems]

Basic setting

[graynada]

The only fault codes I get are inactivity on both lambdas but I haven't checked again since I replaced one. Certainly that bank has less flat spots now, it was worse than bank 1 before.

I've got it booked in for a retest tomorrow but they will check the emissions first for me so I'll see what readings I get off that and I'll do some logging of block 10 and post. Thanks for the help.