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corolla diesel 2.0 D4D will start from cold without any problem,when warm it takes 20 -30s to start sometimes longer and is getting worse.glow plugs are good, maf sensor has been cleaned,scv on pump has been changed.no fault codes shown on a basic tester, any ideas gratefully received
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You need to be able to check fuel pressure and coolant temperature on live data when engine warm.Not sure if your basic tester will do this.Could even be a sticky egr valve.hth
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