June 19, 20187 yr 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.
June 25, 20187 yr Hi, Usually due to vacuum leak(s). Put a smoke / pressure tester on it to find them all and fix. Td
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