ktown z Posted November 30, 2007 Share Posted November 30, 2007 When my car is at 2500 rpms it bogs really bad then goes away. It only does this at 2500rpms and partial throttle only. It has a great idle and runs smooth other than this extreme bog. It lasts for a split second but enough to make the nose dive and lift back up. Everyone has told me that it is the throttle position sensor, but I wanted some 280z experience answers. Thanks- James Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted December 4, 2007 Share Posted December 4, 2007 When my car is at 2500 rpms it bogs really bad then goes away. It only does this at 2500rpms and partial throttle only. It has a great idle and runs smooth other than this extreme bog. It lasts for a split second but enough to make the nose dive and lift back up. Everyone has told me that it is the throttle position sensor, but I wanted some 280z experience answers.Thanks- James Hmm, probably need some more detail. Try going to atlanticz.ca and getting the EFI bible to do some diagnostics. I will tell you that the 280Z doesn't have a normal throttle position sensor with varying voltage. It has an open/close circuit to indicate at very low or closed throttle and another open/close circuit to indicate >~60% throttle (WOT). If you get it to bog at a very specific throttle range ONLY at 2500 rpm then it could be that it's not kicking into the WOT switch or out of the closed switch fast enough and going somewhat lean, etc. It could be a lot of other things, though, since you didn't indicate that you had actually tried anything before posting. Quote Link to comment Share on other sites More sharing options...
nismopick Posted December 4, 2007 Share Posted December 4, 2007 ALWAYS check the basics before digging in deep... Timing? Spark plugs? Cap? Rotor? Wires? Efi connections? Sensors? Proper fluid levels? Vac hoses? etc etc etc... Quote Link to comment Share on other sites More sharing options...
Thumper Posted December 4, 2007 Share Posted December 4, 2007 It could also be a dead spot in the afm. Check its voltage while you move the flap. A manual sould tell you what wires maybe atlantic. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted December 4, 2007 Share Posted December 4, 2007 It could also be a dead spot in the afm. Check its voltage while you move the flap. A manual sould tell you what wires maybe atlantic. 'The AFM is your friend" from www.atlanticz.ca in the tech section will tell you how to test the AFM with a multimeter. Even so, it can be tricky to test it. Quote Link to comment Share on other sites More sharing options...
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