I just bought a 1978 Datsun 280Z which i think has the L28, and is a 5 speed which i think is the T5 transmisison. Anyway i got it for $1500, its tagged, runs and drive great... except at part throttle and where it misses and back fires badley. When it idle it sounds like my heavily cammed LS1 and i know it shouldnt haha.
The engine has just had a new head put on it, or head work i forgot which. The head says N47 on it. Has new plugs, new wires. It has a cold air intake, and it also has a long tube header with 2 1/2" exhaust. Now i noticed that the EGR is blocked off. There is a provision for the EGR in the long tube but it is plugged off at well. I am thinking this may be the reason for the hesitaion or part of the reason.
I am also thinking that perhaps the vane air meter could be messing up or the TPS. I know nothing about these engines i am just trying to figure out where to start. Under WOT the engine runs great!. This to me leads me to believe that it could be the EGR or the VAF as in my mind these are part throttle systems. I am going to run some injcector cleaner through it for the hell of it tomorrow while im driving it around.
What do you all think? Here are some pictures. I got it to swap an LS1/T56 into but id like to drive it around in the meantime while i collect parts.
http://viewmorepics.myspace.com/index.cfm?fuseaction=user.viewPicture&friendID=5884057&albumId=2523663
