My 300ZX is bogging..HELP.

[PooGreenS13]

I have a 90 300 ZX non turbo. Ive done a full tune up on the car among other things, and the car still bogs out somewhere above 4k rpms. It feels like the car doesnt even want to move out of it own way. It idles ok and sounds ok under 4k rpms, but after that point it feels as if 2 or 3 of the cylinders drop off.....wtf is the problem? I appreciate your help!

[nanner47]

sound like a Mass Air Flow problem... buy some MAF cleaner from autozone or pepboys and spray it clean.. be gentle with it though, it is very sensitive and expensive to replace

[s13rookie]

It could be a TPS issue. I dont know if it is a similar set up to a s-chassis with that crazy cramped engine bay, but you could probably check it in 5mins with a meter. It may just need to be adjusted.

[warlordcrom]

I have the same problem with mine, I'm pretty sure its the maf. I'm looking for one to try swapping in.

[greenzenki86]

same problem with mine, i have a 96 s14, and as im idling its fine, same with driving, once is get up to 3 - 4krpms, it will hesitate, kinda like a misfire or fuel starvation, let us know when you figure yours out. MAF does sound like a good suspect though.