jryeager

sounds like a mill saw when driving. real nasty lumber jack type noise as well if that helps any. mechanic neighbor heard it one time and told me i had a nasty exhaust leak. Sorry novice to it all and understand if I am not being clear or explaining enough for any real direction. appreciate the thoughts and any input though.

My plan was to change out cracked old looking hoses and put on headers and see if that fixes the rough or at times non existing accelerating. The jumping when trying to drive putting it in first gear or the wanting to die when i rev it up, the non rev when i try and rev. it just misses all together. Gets better after warming it up for fifteen minutes in am. Drive to work and park for ten hours and then is really rough at night even after warming it up.

SU Carbs. My dad told me they should be good and he had them tuned not too long ago, but then again i dont think he has drove it more than ten or fifteen times in the last 4 years. mostly just parked in the garage. I thought about ordering the video from ztherapy to try and familiarize myself to it, but my mechanic neighbor is trying to sell me on weber carbs and im thinking about it because i know he can help me with them, but i was under the impression the SU carbs are learnable with the help of that video. Just got the car last week so havent got to much investigative work yet. Was told by my non mechanic father that the manifold needed to be replaced and was cracked and want to say it was the head. Not sure where the exact leak is and I am believing there is more than one. The hoses and the manifold.

Hello all! I am new to the forum and new to my 1972 240z passed down to me by my father the original owner. It has a F54 block from 81-83 280z and a N42 head (75-76 280z) from what i gathered. My problem is that it has major exhaust leak. I can tell some hoses need replaced because they have some cracks and when i spray carb ether stuff on the hoses it changes the idle. But was told by my father that i have to replace manifold because it too leaks. I want to put on a header and new exhaust and am looking at zstore for there 6-1 header with MSA exhaust or the 3-2 header with exhaust. Wondering which one will sound better? Any suggestions would be great. Not looking for quiet, all for it sounding mean. Second part and more importantly, when i start it it starts fine and idles fine, however when i push on gas to drive or even rev it up it doesn't want to rev and acts like its gonna die. Can this be just because of the exhaust leak? Feels and acts like to much air getting in there. Drives, but i have to drive with choke half way open. Any input would be great. sorry for the long post, but need help bad and am in love with this car and want to get it running good so i can enjoy! Thanks in advance!