Vauxhall Vectra 1997 Diesel X20DTL Loss of powerArchived Message
Posted by Nick Bell on June 9, 2004, 9:27 am
Hello All, Diesels are not my forte, but agreed with customer to read any fault codes and provide printout of live data. No codes logged (apart from A/C problem... hasn't got A/C). They told me they had tried a new MAF (same part no. etc.) to no avail. Have looked in archives and will suggest blocked CAT to them! However there seemed to be a few disccrepancies in live data which I hope someone can explain to me. MAF sensor had strange units and didn't seem to change much i.e. 379mg/strk @ idle, and a similar figure @ 3300 rpm. The o/p voltage which was 1.7V @ idle did seem to change though couldn't get up to 4+ volts. Also Desired injection start was 0 deg CA, and actual 3.9 deg CA @ idle and 8.8 deg CA @ 3300 rpm. The EGR pulse ratio was 65% @ idle, which you wouldn't see on a petrol engine. And last of all, what is TIP switch (I,R and O).
As always, any information gratefully received!! Regards, Nick Bell