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HELP: Erratic Idling
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<blockquote data-quote="meg_omen" data-source="post: 1109040" data-attributes="member: 6316"><p><span style="font-family: 'Times New Roman'">bros and sifus... need your help and expertise in this matter...</span></p><p><span style="font-family: 'Times New Roman'"></span> </p><p><strong><em><span style="color: #000000"><span style="font-family: 'Times New Roman'">Problem:</span></span></em></strong></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Erratic idling.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Engine ‘hesitate’ if rpm below 2500, onward acceleration still responsive.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Idling and ‘hesitation’ worse when a-cond is on.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Fuel consumption increase to RM65 = 440km (previously reach 500km)</span></span></p><p> </p><p><strong><em><span style="color: #000000"><span style="font-family: 'Times New Roman'">History:</span></span></em></strong></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Day 0</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Change coolant (Toyota OEM), afterwards running in is okay.</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"> </span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Day 1</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Starts car, felt the car jerking… bad idling, felt like the spark plugs wet.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Check and clean the plugs, still the same. Cannot continue checking cause need to drive to Melaka.</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"> </span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Day 2</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Still the same even after driving to Melaka and back.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Check and clean the ‘plug hole’, replace new spark plugs… no changes.</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"> </span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Day 3 – 5</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Found in the Net, possibilities are</span></span></p><p><span style="color: #000000"><span style="font-family: 'Courier New'">o </span><span style="font-family: 'Times New Roman'">vacuum leaks</span></span></p><p><span style="color: #000000"><span style="font-family: 'Courier New'">o </span><span style="font-family: 'Times New Roman'">idling control valve</span></span></p><p><span style="color: #000000"><span style="font-family: 'Courier New'">o </span><span style="font-family: 'Times New Roman'">vacuum sensor</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Few days already checking from connector to wiring…if any loosen.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Suddenly, unplug vacuum hose at TB and then plug back… all okay. This hose are from one of the vacuum sensor… circle in red.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Let the engine running for a while, then after switching the ac on, problem starts again.</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"> </span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Day 7</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Check and clean the valve at the TB (red circle)… no changes.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Change the o-ring for AFPR… no changes.</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Change all vacuum hose to silicon (ayam brand)… no changes.</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"> </span></span></p><p> <span style="color: #000000"><span style="font-family: 'Times New Roman'"></span></span></p><p> <span style="color: #000000"><span style="font-family: 'Times New Roman'"></span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"><strong><em>Questions:</em></strong></span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">1- How to know is the ICV is okay?</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">2- What is the vacuum sensor for… red circle and blue circle?</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">3- Where can I get this vacuum sensor (red circle)? Anybody have ‘left-over’ from their conversion, give me the price? The sticker at the sensor shows…</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">DENSO</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Sensor Assy. Vacuum</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">89420-12070</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">100798-2563</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">5V</span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">4- Any other possibilities? Really confused already…please help?</span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"> </span></span></p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'"><strong><em>Note:</em></strong></span></span></p><p><span style="font-family: 'Times New Roman'"><span style="color: #000000">- Spark plug are ‘side-gapped’, including this new change already using 4 sets.</span></span></p><p> </p><p><span style="color: #000000"><span style="font-family: 'Times New Roman'">Thanks. </span></span></p></blockquote><p></p>
[QUOTE="meg_omen, post: 1109040, member: 6316"] [FONT=Times New Roman]bros and sifus... need your help and expertise in this matter... [/FONT] [B][I][COLOR=#000000][FONT=Times New Roman]Problem:[/FONT][/COLOR][/I][/B] [FONT=Times New Roman][COLOR=#000000]- Erratic idling. - Engine ‘hesitate’ if rpm below 2500, onward acceleration still responsive. - Idling and ‘hesitation’ worse when a-cond is on. - Fuel consumption increase to RM65 = 440km (previously reach 500km)[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] [/FONT][/COLOR] [B][I][COLOR=#000000][FONT=Times New Roman]History:[/FONT][/COLOR][/I][/B] [COLOR=#000000][FONT=Times New Roman]Day 0[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Change coolant (Toyota OEM), afterwards running in is okay.[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] Day 1[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Starts car, felt the car jerking… bad idling, felt like the spark plugs wet. - Check and clean the plugs, still the same. Cannot continue checking cause need to drive to Melaka.[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] Day 2[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Still the same even after driving to Melaka and back. - Check and clean the ‘plug hole’, replace new spark plugs… no changes.[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] Day 3 – 5[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Found in the Net, possibilities are[/COLOR][/FONT] [COLOR=#000000][FONT='Courier New']o [/FONT][FONT=Times New Roman]vacuum leaks[/FONT] [FONT='Courier New']o [/FONT][FONT=Times New Roman]idling control valve[/FONT] [FONT='Courier New']o [/FONT][FONT=Times New Roman]vacuum sensor[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Few days already checking from connector to wiring…if any loosen. - Suddenly, unplug vacuum hose at TB and then plug back… all okay. This hose are from one of the vacuum sensor… circle in red. - Let the engine running for a while, then after switching the ac on, problem starts again.[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] Day 7[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Check and clean the valve at the TB (red circle)… no changes. - Change the o-ring for AFPR… no changes. - Change all vacuum hose to silicon (ayam brand)… no changes.[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] [B][I]Questions:[/I][/B][/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]1- How to know is the ICV is okay? 2- What is the vacuum sensor for… red circle and blue circle? 3- Where can I get this vacuum sensor (red circle)? Anybody have ‘left-over’ from their conversion, give me the price? The sticker at the sensor shows…[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman]DENSO Sensor Assy. Vacuum 89420-12070 100798-2563 5V[/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]4- Any other possibilities? Really confused already…please help?[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman] [B][I]Note:[/I][/B][/FONT][/COLOR] [FONT=Times New Roman][COLOR=#000000]- Spark plug are ‘side-gapped’, including this new change already using 4 sets.[/COLOR][/FONT] [COLOR=#000000][FONT=Times New Roman][/FONT][/COLOR] [COLOR=#000000][FONT=Times New Roman]Thanks. [/FONT][/COLOR] [/QUOTE]
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HELP: Erratic Idling