Brad_225 Posted June 19, 2018 Share Posted June 19, 2018 Greetings. Please can you guide me. My 2002 Impreza jerks as soon as boost kicks in. Ej20 with a TD05. New plugs fitted + We have changed (all OEM). MAF sensor, Lambda sensor, wiring harness, coil packs, replaced the CAI with the stock air bock, cam sensor. We even put the stock turbo back. Issue persists. Quote Link to comment Share on other sites More sharing options...
wtdash Posted June 25, 2018 Share Posted June 25, 2018 Hi, Usually due to vacuum leak(s). Put a smoke / pressure tester on it to find them all and fix. Td Quote Link to comment Share on other sites More sharing options...
el_freddo Posted June 26, 2018 Share Posted June 26, 2018 Sounds like dead spark or weak fuel pressure. Cheers Bennie Quote Link to comment Share on other sites More sharing options...
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