Posted By: shaggy1
HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 04:58 AM
Not sure on internals, since I bought the motor 10 yrs. ago, but it is by no means radical. Anyway, motor is in 70 dart with points dist. 727 and 3:91 suregrip. Went to Street machines and done a few burnouts in the campground, as it will light the tires instantly. All was fine until it wouldn't even turn a tire over. I had literally just lit the tires, went around a corner and tried to do another, and it fell on its face. Twice. Ran fine rest of the weekend until the drive home. Got on the Istate after about 20 miles of 2 lane or so, got up to 55 or 60 for a mile or two and it starts popping, backfiring and acting like its out of fuel. Pull off to the side and it finally clears up and will rev. Pull back out and it does the same thing 4 more times. Ended up swapping it out in the trailer with a buddys car. get it home, and wont do a burnout. tried 4 or 5 times. 5 minutes later was driving it home, stopped, and it instantly lit the tires like nothing was wrong. Week later, thinking I had bad gas, drained tank put in 93 octane, and now, it wont idle. Always idled about 1000 rpm in park, 5 to 700 in gear. Now its 7 to 800 in park and 3 to 400 in gear. Hadn't touched timing or idle screw, Bump the timing up and idles better in park but still the same in gear. Pulled the plugs, they looked good. Put in a new set just because, and voila, it idled fine. So down the road for a run test, and it ran better than it ever had. All of a sudden when I pull up to a stop sign, it wont idle again. Is this all related or is this multiple problems? Pulling my hair out, somebody give me some help please.
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:03 AM
Motor has only been running for the last 5 months, sat on a stand up until then. Just replaced gaskets and repainted before dropping it in.
Posted By: moparpollack
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:04 AM
Seems to be running out of fuel or there is crap in the needle and seat.
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:10 AM
Thought that to, but wouldn't it act the same all the time, as opposed to sporadically?
Posted By: stumpy
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:10 AM
Check the points gap and see if they are burnt and check that the condenser is screwed down tight. Check the rotor and carbon tracks inside the distributor cap while you're in there.
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:13 AM
Was going to change points and condenser in the morning, cap looks like new.
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:19 AM
Have a buddy with an old Harley, he told me condenser also. Do you think all that I have described comes back to the condenser or do I have other problems to?
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:26 AM
Had coils go bad in the past, they just quit. Dead as a hammer.
Posted By: RapidRobert
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:54 AM
I just had a coil (black FBO) act just like that (part time)
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 06:02 AM
Guess I'll rob a coil off of something else and try it, before I change points and condenser. One thing at a time, till I figure it out. Thanks for all the help guys, really appreciate it.
Posted By: RapidRobert
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 06:24 AM
just me I'd change the condensor not the points or coil first. It'd be easy/cheap to do & you wouldn't have to mess with readjusting the points. But you do have an extra coil on hand to sub in & (free/The little bit of time expenditure needed) is as good as it gets. Holler how it turns out
Posted By: crazyjjk
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 04:03 PM
Gas tank not venting and creating a vacuum????
Posted By: Paul_Fancsali
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/14/14 05:04 PM
One thing stop the stupid burnouts all they do create issues down the line condenser first then coil also check for blown headgasket esp on 2-4 and 5-7 cylinders. Had that happen three times over the years running at the track never overheated but car started acting up but hit dist first
Posted By: shaggy1
Re: HELP! All of a sudden 360 runs like crap (long winded) - 07/16/14 03:46 AM
Well, ended up having to work yesterday, so changed out the coil tonight. Seems to run better, but after I drove it for a little while, it acted up again. Going down the road and started cutting out, backfiring, the whole nine yards. It cleared up and then I couldn't get it to do it again. Came back home, pulled in the driveway and the idle dropped. Seems like the longer I let it set and idle, the lower the idle got. I'll change the condenser tomorrow night and see what that does. It had a little bit of a surge going down the highway, but that has disappeared. Thinking the coil has been on its last leg for a while now.