Hi all! I'm having a problem with a rough idle on my jeep. It's a 97 with automatic trans. The symptoms are high idle at start-up until it warms up or I throw into gear (which bumps it down to around 1,000). Then after driving for 10-15min, when I slow down to a stop at a light the engine idles very low (like 500rpm) and she shutters a bit. But, it immediately jumps back up to around 700. However, once fully warmed up it idles rough occasionally (~650) and doesn't purrrr like it usually does around ~700-750. It almost sounds like it's misfiring or skipping. The tach drops a tiny bit every time I hear that "misfire".
Tonight I took the jeep to o'reillys and had the associate hook up the scanner. 3 codes came up over and over. P0171, P0133 and P1489. My cursory search on the old interwebs returned near a hundred different suggestions so I figured I'd ask you guys where to start. I don't have the money to just throw new parts at the jeep and would like some suggestions on where to start.
Please be patient as I'm sure I forgot to mention something. Thanks in advance guys!
Edit-P0171 fuel system too lean bank 1
P0133 left upstream o2 sensor
P1489 Aux 5 volt output too low
would a leak in the exhaust system cause all of these codes? I will replace manifold or a portion of the exhaust system if needs be but I dont know how to check for a leak in exhaust and would much rather replace an O2 sensor before replacing major exhaust system parts.
Scotty
Tonight I took the jeep to o'reillys and had the associate hook up the scanner. 3 codes came up over and over. P0171, P0133 and P1489. My cursory search on the old interwebs returned near a hundred different suggestions so I figured I'd ask you guys where to start. I don't have the money to just throw new parts at the jeep and would like some suggestions on where to start.
Please be patient as I'm sure I forgot to mention something. Thanks in advance guys!
Edit-P0171 fuel system too lean bank 1
P0133 left upstream o2 sensor
P1489 Aux 5 volt output too low
would a leak in the exhaust system cause all of these codes? I will replace manifold or a portion of the exhaust system if needs be but I dont know how to check for a leak in exhaust and would much rather replace an O2 sensor before replacing major exhaust system parts.
Scotty
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