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Author Question: An engine has a rough idle condition with high HC (Hydrocarbon) emissions only at idle and low ... (Read 72 times)

stevenposner

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on: Nov 30, 2019
An engine has a rough idle condition with high HC (Hydrocarbon) emissions only at idle and low speeds.  A diagnostic trouble code (DTC) indicating a lean air-fuel ratio is stored in the powertrain control module (PCM) memory. Emissions of CO and NOX meet emission standards.  At 2,500 engine rpm, the HC emissions are normal. The MOST likely cause of this problem is which of these:
◦ Defective ECT (engine coolant temperature) sensor
◦ Low fuel-pump pressure
◦ Defective injectors
◦ Stuck open EGR valve
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Marked as best answer by stevenposner on Nov 30, 2019

BAOCHAU2803

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Reply #1 on: Nov 30, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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stevenposner

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Reply 2 on: Nov 30, 2019
YES! Correct, THANKS for helping me on my review

helenmarkerine

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Reply 3 on: Yesterday
:D TYSM

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