Question about 1983 Jeep CJ5

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Timing amc 401 engine dies before reaching timing marks.

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Outer ring of the crank pulley may have spun on the center hub. If that has happened, it's not even close to where it should be. Check actual TDC by removing #1 spark plug and inserting a plastic drinking straw into the hole as the piston is coming up while you turn the engine by hand (key off). TDC will be at the place where the straw stops going up. Mark the pulley with white paint or crayon and use that as the crank reference mark.
There are better more accurate (and complicated) ways of doing this but it should get you close enough for now. Replace the pulley as soon as you can if it has turned though to prevent further problems.
Also keep in mind that factory specifications worked well with fuel available then. Today's fuel is of lower quality and some "by ear" adjustments may be necessary to compensate for that.
If you have no other engine problems this should work.

Posted on Jul 03, 2010

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Posted on Jan 02, 2017

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  • From Repair Pal:
  • OBD II P0155 Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
Symptoms
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from Asecmt
Po401 is from clogged passages for the egr system. the port pipe from EGR to intake manifold is more than likely clogged. You have to remove the throttle body to do. this to clean you remove the throttle body and you will see a tube a couple of inches in the plenum and it will probably be plugged solid so just get a pick or screw driver and start picking. good idea to take the valve off so you can blow through the passage to make sure all is clean
From Jamhtx:
I took off egr valve, then Once the throttle body was out of way, there was only one port pipe inside intake manifold. It was plugged solid with a hard mudd like feel to it. Several hours picking at it using carb cleaner and long screwdriver, then finally it was cleared. It would of saved time if I had air hose to blow through port once it got looser (but now I know for next time). Went for a short drive, then FINALLY the check engine light went off. Next morning got my emission inspection...passed!

I hope this helps!

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Amc dies?


For a older car like yours, sometime sick just like an older people. Car is different, if you can find the reason why cause this kind problem, as soon as you fix it, it will run for a while, but it is not easy, I think when you drive for a while, the engine is hot and inside is over heated, the ring on the piston expanded, that’s cause the engine stalled, after 10 to 15 minutes, the engine cool down, it will start and drive a short distance again and wait until the engine getting hot again, it will stall again.

How do you solve this problem, go to junk yard and find a low mileage engine put in or rebuild your engine.

Hope this can help.

Frank

Jul 02, 2008 | 1986 AMC American Motors Eagle

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