Engine - Miss/Lacks Power/Popping From Exhaust Manifold: Overview
BULLETIN NO.: 94-T-07GISSUE DATE: August, 1999
GROUP/SEQ. NO.: Engine-03
CORPORATION NO.: 99-06-04-035
SUBJECT:
Engine Misses, Lacks Power, and/or Emits a Popping Noise Through
Exhaust Manifold on a Deceleration and/or at Idle - SOHC (LK0/L24)
Engines (Cut Exhaust Valve Guides)
This bulletin has been revised to include valve guide Go/No-Go Gauge
special tool (J43120) and ignition coil (P/N 16167763). This bulletin
supercedes bulletin 94-T-07F, which should be discarded.
MODELS AFFECTED:
1991-1995 Saturn S-Series vehicles equipped with SOHC (LK0 or L24)
engines
CONDITION:
Vehicles may miss or lack power under normal engine operating conditions. Also a popping noise may be emitted through the exhaust manifold on deceleration and/or at idle.
CAUSE:
These conditions may be caused by:
^ Electrical ignition secondary, mechanical or fuel system component(s) malfunctioning
^ Deposit built-up on exhaust valve guides and exhaust valve stems, causing the exhaust valves to close too slowly during engine warm-up and hot driving conditions.
CORRECTION:
Refer to the following diagnostic charts and service procedures.
Begin with the Diagnostic Chart on the facing page. The steps in the Diagnostic Chart that contain a circled number (e.g. (01)) refer to the notes below. These notes provide additional detail on those specific steps in the Diagnostic Chart.
Notes on the Diagnostic Chart 1:
MISFIRE DIAGNOSTIC CHART 1
MISFIRE DIAGNOSTIC CHART 2
MISFIRE DIAGNOSTIC CHART 3
PARTS REQUIREMENTS:
CLAIM INFORMATION:
To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System as shown.