Big Dean t Posted January 1, 2016 Share Posted January 1, 2016 Please look at picture.... Why is it when I connect the breather pipe to the dump valve or put finger over pipe tick over goes really low like it wants to cut out then shoots up again and dose it a few times before coming steady?? And how can I fix it ? Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 1, 2016 Share Posted January 1, 2016 The reason the revs change is when you take the vac line off the top of the dump valve. The vac line end is open allowing unmetered and unfiltered air to be sucked into the inlet which affects the mixture /idle What is the issue or fault your trying to find? If it's not broke .....upgrade it 1 Quote Link to comment Share on other sites More sharing options...
Big Dean t Posted January 1, 2016 Author Share Posted January 1, 2016 When you Rev the engine nearly stalls and then goes up and down before it ticks over stable I've put a brand new MAF sensor as was told to try that first Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 1, 2016 Share Posted January 1, 2016 What year / model is it and Have you had the ecu codes read ? If it's not broke .....upgrade it Quote Link to comment Share on other sites More sharing options...
Big Dean t Posted January 1, 2016 Author Share Posted January 1, 2016 Impreza Year 2000 2 ltr turbo awd Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted January 1, 2016 Share Posted January 1, 2016 Hi, I see you're in Kent. If you're local I'd gladly pop down or you can come to me or even pop to one of our monthly meets for some hands on fiddling. 1 Quote Link to comment Share on other sites More sharing options...
stants Posted January 2, 2016 Share Posted January 2, 2016 you can come to me or even pop to one of our monthly meets for some hands on fiddling. [emoji667] this [emoji23] 2 Quote Link to comment Share on other sites More sharing options...
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