Will exhaust make jeep run bad?
I have been fighting a few problems lately. Lack of power of overall regular and intense driving. Take off is really bad, I had to ride clutch longer or the engine wants to choke and jerk. More like its sucked a ton of air and takes a second to get gas and then finally takes off.
Another issue which I have had for quite a long time now is lack of power while driving long distances. This is a little different than above. It usually happens when I drive over 200 miles or so. I'm usually traveling around 60MPH on interstate. I will be driving along and all of a sudden the jeep engine starts choking(chug chug chug) and I lose most power of engine. It takes me all the way down to around 15-30 mph. Finally I can get the gas pedal(slowly working with it) to finally give the engine gas and the engine stop choking and actually get the jeep to start moving again. But I can't push the gas pedal down hardly at all. It will start choking again. Even if I pull over and let it sit for a half an hour. I start the jeep and take off and 10 minutes or even less it will start doing it again.
Then when I let the jeep in town and start driving at slower speeds it is fine. Takes off and drives under 40MPH just find without choking. Also if it sits over night its fine to drive on highway again for another 200-300 miles again. Its crazy!
So a month ago I got a leak under manifolds and found the exhaust manifold and intake manifold gaskets had completely burned out, dried out and huge pieces were gone. I knew it had an exhaust leak for several months but continued to drive it around town thinking it was the exhaust flange leaking. It kept getting louder and I found the real problem.
I had just replaced these gaskets 3 years ago!! I couldn't believe they were already that far gone. Excessive heat is the only thing I could think of. So I replaced the gaskets again.
Now I realized I had driven 2-3 times over 400 miles on interstate while these exhaust gaskets were leaking. The engine never choked during the exhaust leaking. I figured others things fixed it and kind of forgot about it until I fixed the leak. I replaced all the exhaust and intake seals. Donut gasket. And I replaced the exhaust flange bolts and got a nice seal for the tail pipe connecting to the exhaust flange.
After I got the seals fixed I drove it home which was 130 miles away. On that very trip home it started choking on me again which it had not done the whole time its exhaust was leaking!!
So my question is maybe its my exhaust? It's shot. Its rusted up and looks like hell. I took it to an exhaust shop and they said it was terrible. No cat, just a muffler and tail pipe.
Could my exhaust be clogging and causing backed up exhaust back to the engine and causing it to overheat? Or causing that engine choking?
PS: I have the following:
258 with new weber 38/38
replaced spark plugs, new fuel filter, no FPR, gas tank is clean, new fuel pump(manual), new coil, new distributor cap and roter, new thermostadt, radiator flushed and 50/50 mix used, removed A/C(yeah, that old 1980's add-on unit), and a new ECM. This is the stuff I did trying to figure out the engine choking problem last year before the exhaust leak.
Habitual MSC#2 in summer and MSC#4 in winter.
My CJ Rebuild -
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