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1992 245 (LH2.4) Idle Problems, Missing, Rough Running,1000rpm+ Runs Great 200

posted by  someone claiming to be Build on  Wed Jan 16 17:39 CST 2019 [RELATED]

Hi Everyone,

Today with a warm engine, while driving my 1992 245 (LH 2.4) for 15+ minutes, it instantly started rough running/missing at idle, and accelerating slightly above idle. At 1000rpm + it runs great as always.

When the engine is cold, it idles and runs fine. After it warms, it idles very rough when driving. When it's sitting in park, the idle is fairly smooth with only slight intermittent roughness.

The throttle body is clean, TPS is working and properly adjusted, AMM (cleaned) and ECU are 6 months old. Anything 1000rpm+ runs strong and normal, regardless of temperature.

I'm wondering if it might be the ECT? Its wire is still connected but I haven't tested it.

Any ideas are very appreciated. Thanks, Jim





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