leg81 Posted January 11, 2015 Share Posted January 11, 2015 hi to all ive just had an 2000 uk Subaru impreza car drives fine im well happy but when I boost it holds back then goes then holds back .sorry only way I can describe it would appreciate help many thanks Quote Link to comment Share on other sites More sharing options...
stants Posted January 11, 2015 Share Posted January 11, 2015 Hi welcome, could be one of many things from a hole in one of the vac lines loose clip on the air box or something more. May be worth doing a diagnostic test either with an odd scanner or using the self test connectors under the drivers side of the dash. http://uk.subaruownersclub.com/forums/topic/2366-manually-reading-ecu-codes/ Try this 1st see if anything comes up. Then I'd have a look to see if there's any loose or split hoses Quote Link to comment Share on other sites More sharing options...
leg81 Posted January 11, 2015 Author Share Posted January 11, 2015 :Dwill try these steps many thanks ,,,,,,,,,,,,,,,,,,,,,,,appreciate it Quote Link to comment Share on other sites More sharing options...
stants Posted January 11, 2015 Share Posted January 11, 2015 No worries keep us posted as to how you get on, have you got a boost gauge fitted ? Do you know at what point it's holding back boost/revs wise could be hitting fuel cut point to save it from bad things happening. Quote Link to comment Share on other sites More sharing options...
leg81 Posted January 11, 2015 Author Share Posted January 11, 2015 I have boost gauge its hitting 15/18 psi if it was a normal engine ie non turbo it gives the impression of a plug breaking down but ticks over perfect ?? Quote Link to comment Share on other sites More sharing options...
leg81 Posted January 11, 2015 Author Share Posted January 11, 2015 its been suggested to me it could be boost controller ??? Quote Link to comment Share on other sites More sharing options...
quit Posted January 11, 2015 Share Posted January 11, 2015 Is it standard ? If yes could be the actuator 1 Quote Link to comment Share on other sites More sharing options...
stants Posted January 11, 2015 Share Posted January 11, 2015 Over one bar, assuming it's on a standard engine with no mods or remap I'd say it's cutting fuel, turn the boost controller down 1 Quote Link to comment Share on other sites More sharing options...
leg81 Posted January 11, 2015 Author Share Posted January 11, 2015 thanks for the help will try these and get back to you all :) Quote Link to comment Share on other sites More sharing options...
quit Posted January 11, 2015 Share Posted January 11, 2015 If it's got a manual boost controller .... Put it in the bin 1 Quote Link to comment Share on other sites More sharing options...
robhull Posted January 11, 2015 Share Posted January 11, 2015 it could the the mass air flow sensor had the same fault with mine gave it a clean out its now pulls like a train 1 Quote Link to comment Share on other sites More sharing options...
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