fendervg 32 Posted June 29, 2014 Just wondering if anyone knows how to tell if an O2 sensor needs replacing? How long are they supposed to last? Thanks. Quote Share this post Link to post Share on other sites
Sean_Jaymo 0 Posted June 29, 2014 Vcds logging will tell you. Quote Share this post Link to post Share on other sites
fendervg 32 Posted June 29, 2014 Ok - nothing wrong with mine so. What about the MAF? Quote Share this post Link to post Share on other sites
swiftkid 1 Posted June 29, 2014 In my experience lambdas very rarely go wrong with the vr6, maf's on the other hand go all the time and they make lambdas throw up a code. I'd always check the maf us working before looking at the lambda sensor Quote Share this post Link to post Share on other sites
fendervg 32 Posted June 29, 2014 Ok - thanks. What's the best way of testing the MAF? Quote Share this post Link to post Share on other sites
Sean_Jaymo 0 Posted June 29, 2014 Unplug it with the engine running, if it's OK the engine will run like a bag of nails. If no change, then it's likely dead. What are your symptoms? Quote Share this post Link to post Share on other sites
fendervg 32 Posted June 29, 2014 Power is down and sometimes it stalls when coming to a stop, and hunting idle as well intermittently. Quote Share this post Link to post Share on other sites
swiftkid 1 Posted June 29, 2014 Sounds suspiciously like maf to me, those things are sneaky little gits! Try to put the blame on lambdas! Quote Share this post Link to post Share on other sites
Sean_Jaymo 0 Posted June 29, 2014 I agree with SwiftKid. They are obsolete now but this thread comes up a dozen or so times a month. Have a quick look back through the recent threads and you'll find the answer on how somebody solved their problems... Quote Share this post Link to post Share on other sites
fendervg 32 Posted June 30, 2014 Cheer for that - I have an old MAF that I will swap in and test and see what the results are. At the moment there is practically no difference in engine behaviour when the MAF is unplugged. Quote Share this post Link to post Share on other sites
Sean_Jaymo 0 Posted June 30, 2014 You can clean them up with electrical contact cleaner for potential short term fix. Quote Share this post Link to post Share on other sites
