dneu Posted July 30 Report Share Posted July 30 Pre-heating O2 sensor fault. The car run well, although i noticed higher consumption. Two more codes came on fuel pressure sensor and engine speed sensor. I finally decided to replace them. After I did it the car does not run. It starts an is running very rich, clouds of smoke and does not idle for more than a few seconds. Scanner does not show any other codes. If I disconnect MAF sensor the car idles much better. I check it with a scanner again. No DTC now. Previously randomly fuel pressure sensor (after I installed the new one. Update: I installed a new engine speed sensor - still no change. Trying everything I just disconnected the hose from charcoal canisters to intake manifold. (A horizontal fitting on the right side of the intake manifold - facing the engine). Checked the suction with a finger and suddenly engine idle smoothed to the normal, the engine reacted to the gas pedal much better then before and engine stopped smoking. Somehow I achieved almost ideal air-fuel mixture. As soon as I reconnect MAF sensor engine stalls. I switched the MAF sensor with a borrowed one - but no change. Where is the buried gremlin? Quote Link to comment Share on other sites More sharing options...
dneu Posted August 1 Author Report Share Posted August 1 problem solved - a brand new fuel pressure sensor was faulty - fuel pressure 80psi. 1 Quote Link to comment Share on other sites More sharing options...
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