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Engine idles rough, just replaced oxygen sensor

Tiny
_STINGRAY_
  • MEMBER
  • JEEP
1988 Jeep pioneer. When I bought this vehicle it had no spark. I replaced the pickup coil, & the ignition coil, got spark and started vehicle. It idled ruff. I decided to replace the cap, rotor and wires. Still idles ruff. When I give a little throttle it seems to choke itself and wants to stall. Slight backfire. Any info you can give relating this proble is gratefully appreciated.

OK I just replaced the oxygen sensor and it still idles ruff. Whats next.

Thanks
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Saturday, July 29th, 2006 AT 9:19 AM

6 Replies

Tiny
DEMEARSJR
  • MECHANIC
  • 110 POSTS
How long has the fuel been sitting in the vehicle when you bought it?
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Sunday, July 30th, 2006 AT 10:36 PM
Tiny
_STINGRAY_
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As far as I know it last ran in December of last year. There isn't very much fuel in the tank because the fuel light is on.
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Monday, July 31st, 2006 AT 3:32 PM
Tiny
DEMEARSJR
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Didn't say if it was backfiring through the exhaust or the carb.
Did you move the distributor while you were changing the pick up coil?
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Monday, July 31st, 2006 AT 10:36 PM
Tiny
_STINGRAY_
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I removed the distributor off the engine and installed the pickup coil on the bench, and I reinstalled the distribuitor so that rotor is just before the #1 position.
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Tuesday, August 1st, 2006 AT 12:56 PM
Tiny
_STINGRAY_
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Well, now it idled so rough it stalled itself and now I can't get it started. Theres still plenty of spark. I do believe there's a major vacuum leak which I cant seem to locate. Now I have to try to get it started again.
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Tuesday, August 1st, 2006 AT 4:45 PM
Tiny
MIKEYBDMAN
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You have some spark now, I would look at the fuel. Put some good gas in it, and maybe a little additive to remove water. Check the fuel pump to make sure it is supplying good pressure.
Things do tend to break when they sit for too long.
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Tuesday, August 1st, 2006 AT 5:45 PM

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