My Z is sick . She bogs at any RPM over 4500, needs excess throttle to leave a stoplight, and idles poorly unless engine has warmed up. She also requires an excess amount of throttle when taking off from a stop. Any ideas?

 

how does it sound? it'd check the timing and make sure that it's firing on all cylinders firstly.

 

Mass air flow sensor check the wires. throttle postin sensor stuck ? check to see.. there might be a bird stuck in your air intake... lol it happened to my 1982 280zxt

 

I'm guessing he's carb'd and doesn't have MAF/AFM

 

i want to say he did a l28et? maybe?

 

he is running stock carbs if i remember correctly. might need to synch them and do some tunning. also check your fuel pressure and plugs/wires cap rotar. since your carb'd it should be pretty simple

 

Well, haven't got a chance to dig into the carbs. I did replace the wires and plugs and I noticed a bit of difference, but she's still not right.

 

Oh, build is still a l24, carbureted, pertronix ignition. Not too much more. Swapped out to an 81 ZX alternator.

 

Check for vaccuum leaks, possible contaminants clogging fuel lines?

 

You have symtoms of a bad vacuum advance. Could be sticky choke linkage.

 

I know that my dizzy is on it's last leg, was told that quite a few years ago when I first got the car and was too afraid to work on it. Anyone know where to pick one up without spending $800 to get one from MSA?

As for choke linkage, the issue occurs even if I pop the hood and disable the choke by hand at the carbs.

 

you can order one from advance for about 80.00 give or take. i went ahead and swapped up to the 83 280zx dizzy and control module on my 260z, works like a charm and theres a write up around here on how to do it. its really simple and gets rid of that voltage resistor next to the coil. if i can find it again i'll post it up for ya.

 

Unless your dizzy has a lot of side play try picknpull and just get the vacuum advance off of any L6. Take a piece of vac line with you to test before you buy another bad one. Best is the E-12 from a '79-'81 but they can be badly worn too.