SkunkTeeth

Hi Everyone, I am having a problem with my FI 76 280z. It runs great when cold, but once it warms up it will misfire around 2500rpm then run smooth again at 3000rpm. I did a sensor check as per the FSM, and everything was good except the main temperature sensor was reading about 30°F high. I had cleaned the connection terminals prior to this. Could the temperature sensor be reading too high and leaning it out once it warms up? The plugs, wires, and distributor cap are new. Thanks

Thanks careless Ill have to look into the timing also. I think it might be something with my throttle assembly, I have about one inch of slack before the gas pedal has tension, so I though the TPS might be having some problems. How much slack do some of you guys have before the gas pedal has tension?

Thanks for the link Larry I have it but forgot to check for a vacuum leak section. Thanks naviathan, I will try the carb cleaner idea. An update on the idle: This morning when I started the car, it was at about 600 RPM idle running rough, the gauge was bouncing up and down. I tried to adjust the idle speed up but nothing happened. After I actually pushed down on the throttle rod in the engine compartment the idle seemed to shoot back up to 1200 RPM, and thats where it stayed even when I was at work. Any ideas?

Hello everyone, I just got my 76 280z and I am having a couple of problems. It is a L28 with 5 speed, ac, and electric ignition. The valves were recently adjusted and the injectors are new. The AFM has also been recently rebuilt and I just checked it and everything looks good. The first problem is the gas mileage. I am only getting about 16 MPG driving very easily. It smells like it is running rich and there is soot on the bumper near the tail pipe. I have checked most of the connections but I still need to clean the water temperature sensor. Should I remove the thermostat? The second problem is the idle speed. In the morning when it is a little cold (southern california cold...) the idle speed is about 600-700 RPM's and is pretty rough. After I get to work and it is warmed up the idle is about 1200-1300 RPM's. I am guessing this is because of non metered air getting into the system. I checked the EGR and it is not sticking. The hose between the AFM and intake looks good, but I noticed a little metal loop inside, is this from when it is molded? I tried adjust the idle tonight. I tapped the gas and it shot from a rough 600-700 to 1200. I tried adjusting it down and it wouldnt move much. I looked over the vacuum lines and didnt see any cracks. Third, when going at highway speeds the voltage gauge will bounce up to 16 and down to 12 when it is usually a stable 14. Do I need a new alternator? I have the EFI bible and FSM, I am going to start the troubleshooting it lists tomorrow. It says to check the throttle plate and BCCD valve. Any tips on removing these? This is my daily driver so most large work occurs on weekends. Thanks, any help is appreciated. (I copied this from my post on classiczcars, I am just trying to get as much help as possible:-|)