Jonny Posted January 6, 2017 Share Posted January 6, 2017 Hi, still new to the site. I've got a classic Impreza wagon v reg. its got an irritating hesitation nearly all the time, but noticibly worse just cruising/commuting. I've changed the air flow meter and oxygen sensor. But it's still happening. Another problem is it's only boosting at 0.4bar and isn't very Impreza like. Any help would be appreciated! Quote Link to comment Share on other sites More sharing options...
quit Posted January 6, 2017 Share Posted January 6, 2017 did you use a gen maf ? tried usual plugs and leads? boost leak? 1 Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted January 6, 2017 Share Posted January 6, 2017 As above. Not the best time of year but go round and check all your vac and intercooler hoses. Make sure turbo hose is also tight. Any cel? Quote Link to comment Share on other sites More sharing options...
Jonny Posted January 6, 2017 Author Share Posted January 6, 2017 5 hours ago, matt said: did you use a gen maf ? tried usual plugs and leads? boost leak? Used a genuine maf yes. Haven't tried plugs and leads yet, I noticed when I unplugged the oxygen sensor it ran almost perfectly so presumed it was the sensor but no better. There were 2 codes, 24 and 32. 32 would more than likely be from me unplugging the oxy sensor and 24 said idle air control valve? ive erased the codes and going to run it and check again. Thanks guys! Quote Link to comment Share on other sites More sharing options...
Jonny Posted January 6, 2017 Author Share Posted January 6, 2017 I thought if you had a boost leak you would hear it? Wooshing out? Quote Link to comment Share on other sites More sharing options...
quit Posted January 6, 2017 Share Posted January 6, 2017 Not always but if it's the inlet you can hear it a little trying suck air in Quote Link to comment Share on other sites More sharing options...
Jonny Posted January 6, 2017 Author Share Posted January 6, 2017 I've done numerous smoke tests on the engine but not luck in finding any leaks. Quote Link to comment Share on other sites More sharing options...
quit Posted January 7, 2017 Share Posted January 7, 2017 Smoke tests aren't worth it mate don't show it ifcnot under load Quote Link to comment Share on other sites More sharing options...
Jonny Posted January 7, 2017 Author Share Posted January 7, 2017 Visual checks only then.☹️ Quote Link to comment Share on other sites More sharing options...
quit Posted January 7, 2017 Share Posted January 7, 2017 Yeah the inlet is the most problematic !! Getting at it / off is a pig Quote Link to comment Share on other sites More sharing options...
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