sam24th
NAXJA Forum User
- Location
- charlotte NC
So lately I have had a bad idle once the engine warmed up. Otherwise the truck drove perfectly fine. Today I thought I might aswell replace the O2 sensor incase that was what might be causing the erratic idle. After having replaced the o2 the truck idles even worse than it did with the old o2. I threw the old O2 back in it and it idles much worse than it did before. Any ideas what it might be? I think it might just be coincidence that the O2 was replaced and my idle worsened. It was getting late and I didnt get a chance to bust out my multimeter. Tomorrow I plan on testing the TPS and checking the IAC to see if its sticking.
Info:
-1990 Renix model
-4.0 Aw4 transmission
symptoms:
-idle stumbles when starting, and while stopped at stoplights and stopsigns. Anywhere between 300-900 RPM erratically.
-acceleration is nolonger smooth and seems to be bucking and backfiring.
-very rich smell in the exhaust
Parts checked:
-sparkplugs
-wires
-cap
-rotor
-New O2
-I changed the MAP out with 3 other ones and all of them did the same thing and had no affect on the truck.
Info:
-1990 Renix model
-4.0 Aw4 transmission
symptoms:
-idle stumbles when starting, and while stopped at stoplights and stopsigns. Anywhere between 300-900 RPM erratically.
-acceleration is nolonger smooth and seems to be bucking and backfiring.
-very rich smell in the exhaust
Parts checked:
-sparkplugs
-wires
-cap
-rotor
-New O2
-I changed the MAP out with 3 other ones and all of them did the same thing and had no affect on the truck.