{"product_id":"wm-388-u1c1d-genuine-williams-controls®-throttle-control-valve","title":"WM-388-U1C1D | Genuine Williams Controls® Throttle Control Valve","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003cbr\u003e\u003c\/strong\u003eA Throttle Control Valve \u003cspan\u003e\u003cstrong\u003eWM-388-U1C1D\u003c\/strong\u003e \u003c\/span\u003eis a component in a vehicle’s air intake system that regulates the amount of air entering the engine. It is a key part of the engine’s air-fuel mixture control, which affects performance, fuel economy, and emissions.\u003cstrong\u003e\u003cbr\u003e\u003cbr\u003ePart Number: \u003c\/strong\u003eWM-388-U1C1D, WM388U1C1D\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003cspan\u003e: New\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eManufacture\/Brand\u003c\/strong\u003e\u003cspan\u003e: Williams Controls\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e \u003cstrong\u003eWM-388-U1C1D\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"attrib\"\u003eMaximum Operating Pressure\u003c\/td\u003e\n\u003ctd\u003e150 psi (10.34 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"attrib\"\u003eModel\u003c\/td\u003e\n\u003ctd\u003eWM-388-U1C1D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"attrib\"\u003ePort\u003c\/td\u003e\n\u003ctd\u003e1\/4-18NPTF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cstrong data-end=\"597\" data-start=\"585\"\u003e\u003c\/strong\u003e\u003cstrong data-end=\"597\" data-start=\"585\"\u003ePurpose of using \u003cspan\u003eWM-388-U1C1D\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong data-end=\"597\" data-start=\"585\"\u003e:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp data-end=\"452\" data-start=\"417\"\u003e\u003cstrong data-end=\"452\" data-start=\"421\"\u003e1. Regulates Engine Airflow\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"587\" data-start=\"453\"\u003e\n\u003cli data-end=\"516\" data-start=\"453\"\u003e\n\u003cp data-end=\"516\" data-start=\"455\"\u003eControls the \u003cstrong data-end=\"485\" data-start=\"468\"\u003evolume of air\u003c\/strong\u003e entering the intake manifold\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"587\" data-start=\"517\"\u003e\n\u003cp data-end=\"587\" data-start=\"519\"\u003eWorks with fuel injectors to maintain the \u003cstrong data-end=\"587\" data-start=\"561\"\u003ecorrect air-fuel ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"631\" data-start=\"589\"\u003e\u003cstrong data-end=\"631\" data-start=\"593\"\u003e2. Controls Engine Power and Speed\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"761\" data-start=\"632\"\u003e\n\u003cli data-end=\"667\" data-start=\"632\"\u003e\n\u003cp data-end=\"667\" data-start=\"634\"\u003eOpens more for \u003cstrong data-end=\"665\" data-start=\"649\"\u003eacceleration\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"700\" data-start=\"668\"\u003e\n\u003cp data-end=\"700\" data-start=\"670\"\u003eCloses partially at \u003cstrong data-end=\"698\" data-start=\"690\"\u003eidle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"761\" data-start=\"701\"\u003e\n\u003cp data-end=\"761\" data-start=\"703\"\u003eProvides smooth engine response to the accelerator pedal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"798\" data-start=\"763\"\u003e\u003cstrong data-end=\"798\" data-start=\"767\"\u003e3. Supports Fuel Efficiency\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"895\" data-start=\"799\"\u003e\n\u003cli data-end=\"836\" data-start=\"799\"\u003e\n\u003cp data-end=\"836\" data-start=\"801\"\u003eHelps maintain optimal combustion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"895\" data-start=\"837\"\u003e\n\u003cp data-end=\"895\" data-start=\"839\"\u003ePrevents wasting fuel by controlling airflow precisely\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"925\" data-start=\"897\"\u003e\u003cstrong data-end=\"925\" data-start=\"901\"\u003e4. Reduces Emissions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1038\" data-start=\"926\"\u003e\n\u003cli data-end=\"963\" data-start=\"926\"\u003e\n\u003cp data-end=\"963\" data-start=\"928\"\u003eMaintains proper air-fuel mixture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1038\" data-start=\"964\"\u003e\n\u003cp data-end=\"1038\" data-start=\"966\"\u003eWorks with sensors and the ECM to minimize \u003cstrong data-end=\"1038\" data-start=\"1009\"\u003eCO, NOx, and hydrocarbons\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1089\" data-start=\"1040\"\u003e\u003cstrong data-end=\"1089\" data-start=\"1044\"\u003e5. Works With Engine Control Module (ECM)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1324\" data-start=\"1090\"\u003e\n\u003cli data-end=\"1191\" data-start=\"1090\"\u003e\n\u003cp data-end=\"1191\" data-start=\"1092\"\u003eIn modern vehicles, the throttle valve is usually \u003cstrong data-end=\"1171\" data-start=\"1142\"\u003eelectronically controlled\u003c\/strong\u003e (“drive-by-wire”)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1324\" data-start=\"1192\"\u003e\n\u003cp data-end=\"1225\" data-start=\"1194\"\u003eECM adjusts the valve based on:\u003c\/p\u003e\n\u003cul data-end=\"1324\" data-start=\"1228\"\u003e\n\u003cli data-end=\"1258\" data-start=\"1228\"\u003e\n\u003cp data-end=\"1258\" data-start=\"1230\"\u003eAccelerator pedal position\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1276\" data-start=\"1261\"\u003e\n\u003cp data-end=\"1276\" data-start=\"1263\"\u003eEngine load\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1279\"\u003e\n\u003cp data-end=\"1294\" data-start=\"1281\"\u003eTemperature\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1324\" data-start=\"1297\"\u003e\n\u003cp data-end=\"1324\" data-start=\"1299\"\u003eAirflow sensor readings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of a Bad Throttle Control Valve \u003cspan\u003eWM-388-U1C1D\u003c\/span\u003e\u003cspan\u003e:\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp data-end=\"180\" data-start=\"136\"\u003e\u003cstrong data-end=\"180\" data-start=\"140\"\u003e1. Check Engine Light (CEL) Turns On\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"280\" data-start=\"181\"\u003e\n\u003cli data-end=\"206\" data-start=\"181\"\u003e\n\u003cp data-end=\"206\" data-start=\"183\"\u003eMost common indicator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"280\" data-start=\"207\"\u003e\n\u003cp data-end=\"280\" data-start=\"209\"\u003eECM stores \u003cstrong data-end=\"246\" data-start=\"220\"\u003ethrottle-related codes\u003c\/strong\u003e (like P0120–P0124, P2100–P2119)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"321\" data-start=\"287\"\u003e\u003cstrong data-end=\"321\" data-start=\"291\"\u003e2. Poor Engine Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"412\" data-start=\"322\"\u003e\n\u003cli data-end=\"365\" data-start=\"322\"\u003e\n\u003cp data-end=\"365\" data-start=\"324\"\u003eEngine \u003cstrong data-end=\"363\" data-start=\"331\"\u003ehesitates, stalls, or surges\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"412\" data-start=\"366\"\u003e\n\u003cp data-end=\"412\" data-start=\"368\"\u003eReduced \u003cstrong data-end=\"392\" data-start=\"376\"\u003eacceleration\u003c\/strong\u003e or \u003cstrong data-end=\"410\" data-start=\"396\"\u003epower loss\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"457\" data-start=\"419\"\u003e\u003cstrong data-end=\"457\" data-start=\"423\"\u003e3. Rough or High\/Unstable Idle\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"589\" data-start=\"458\"\u003e\n\u003cli data-end=\"517\" data-start=\"458\"\u003e\n\u003cp data-end=\"517\" data-start=\"460\"\u003eEngine \u003cstrong data-end=\"488\" data-start=\"467\"\u003eidles erratically\u003c\/strong\u003e or \u003cstrong data-end=\"515\" data-start=\"492\"\u003erevves unexpectedly\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"589\" data-start=\"518\"\u003e\n\u003cp data-end=\"589\" data-start=\"520\"\u003eIdle may \u003cstrong data-end=\"554\" data-start=\"529\"\u003efluctuate up and down\u003c\/strong\u003e without pressing the accelerator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"639\" data-start=\"596\"\u003e\u003cstrong data-end=\"639\" data-start=\"600\"\u003e4. Throttle Lag or Delayed Response\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"749\" data-start=\"640\"\u003e\n\u003cli data-end=\"693\" data-start=\"640\"\u003e\n\u003cp data-end=\"693\" data-start=\"642\"\u003eSlow response when pressing the accelerator pedal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"749\" data-start=\"694\"\u003e\n\u003cp data-end=\"749\" data-start=\"696\"\u003eCan feel like \u003cstrong data-end=\"727\" data-start=\"710\"\u003eengine “lags”\u003c\/strong\u003e before accelerating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"787\" data-start=\"756\"\u003e\u003cstrong data-end=\"787\" data-start=\"760\"\u003e5. Limp Mode Activation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"892\" data-start=\"788\"\u003e\n\u003cli data-end=\"847\" data-start=\"788\"\u003e\n\u003cp data-end=\"847\" data-start=\"790\"\u003eSome vehicles enter \u003cstrong data-end=\"823\" data-start=\"810\"\u003elimp mode\u003c\/strong\u003e to protect the engine\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"892\" data-start=\"848\"\u003e\n\u003cp data-end=\"892\" data-start=\"850\"\u003eLimits speed and power to prevent damage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"918\" data-start=\"899\"\u003e\u003cstrong data-end=\"918\" data-start=\"903\"\u003e6. Stalling\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"987\" data-start=\"919\"\u003e\n\u003cli data-end=\"987\" data-start=\"919\"\u003e\n\u003cp data-end=\"987\" data-start=\"921\"\u003eEngine may \u003cstrong data-end=\"955\" data-start=\"932\"\u003estall at stoplights\u003c\/strong\u003e or during low-speed maneuvers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1022\" data-start=\"994\"\u003e\u003cstrong data-end=\"1022\" data-start=\"998\"\u003e7. Poor Fuel Economy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1154\" data-start=\"1023\"\u003e\n\u003cli data-end=\"1110\" data-start=\"1023\"\u003e\n\u003cp data-end=\"1110\" data-start=\"1025\"\u003eIncorrect throttle positioning can cause the engine to run \u003cstrong data-end=\"1108\" data-start=\"1084\"\u003etoo rich or too lean\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1154\" data-start=\"1111\"\u003e\n\u003cp data-end=\"1154\" data-start=\"1113\"\u003eLeads to \u003cstrong data-end=\"1152\" data-start=\"1122\"\u003eincreased fuel consumption\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1208\" data-start=\"1161\"\u003e\u003cstrong data-end=\"1208\" data-start=\"1165\"\u003e8. Reduced Power or “Engine Hesitation”\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1292\" data-start=\"1209\"\u003e\n\u003cli data-end=\"1236\" data-start=\"1209\"\u003e\n\u003cp data-end=\"1236\" data-start=\"1211\"\u003eDifficulty accelerating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1292\" data-start=\"1237\"\u003e\n\u003cp data-end=\"1292\" data-start=\"1239\"\u003eEngine may \u003cstrong data-end=\"1272\" data-start=\"1250\"\u003esurge unexpectedly\u003c\/strong\u003e at constant speed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"476\" data-start=\"97\"\u003e\u003cstrong data-end=\"151\" data-start=\"97\"\u003eAbout the Manufacturer – Williams Controls\u003c\/strong\u003e\u003cstrong data-end=\"151\" data-start=\"97\"\u003e:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"196\" data-end=\"539\"\u003e\u003cstrong data-start=\"45\" data-end=\"66\"\u003eWilliams Controls\u003c\/strong\u003e is a trusted manufacturer of vehicle control systems, specializing in throttle controls, sensors, pedals, and other precision components for heavy trucks, buses, off-highway, and specialty vehicles. Founded in 1937 and now part of Curtiss‑Wright, the brand is known for rugged, reliable, and high-performance solutions that ensure safe and efficient operation in demanding conditions.\u003c\/p\u003e","brand":"Williams Controls","offers":[{"title":"Default Title","offer_id":50344478900471,"sku":"WM-388-U1C1D","price":489.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/7080\/3959\/files\/A1297B3_01.jpg?v=1765310457","url":"https:\/\/forcetruckparts.com\/products\/wm-388-u1c1d-genuine-williams-controls%c2%ae-throttle-control-valve","provider":"Force Truck Parts","version":"1.0","type":"link"}