 
				
	| 1990 Lexus LS400 4.0L Poor Idle Quality, Hesitation, Stall, MIL Lamp on The engine idle hunts, and after about 15 seconds it stalls. The engine lacks power. Looking at a wiring diagram the TPS, coolant temperature sensor and the air temperature sensor inside the mass air sensor ALL ground through the same pin on the ecu. I have is... 
                        
                            FIX posted 3/6/2012
                               
                    iATN Members:  Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle 11 Replies Received (View Replies)11 Replies Received (Hide Replies)
 | Message Closed w/FIX 
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| VIN | JT8UF11EXL | 
| Engine | 4.0 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | Federal | 
| Symptoms | Poor Idle Quality, Hesitation, Stall, MIL Lamp On | 
| Occurs | Always | 
Trouble Codes
| 22 | Coolant temperature sensor siganl abnormal shorted/open | 
| 24 | Intake air temperature sensor part of Mass Air Sensor | 
| 41 | TPS sigal abnormal | 
| 47 | TPS Shorted/open | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                1990 Lexus LS400
| VIN | JT8UF11EXL | 
| Engine | 4.0 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | Federal | 
| Symptoms | Poor Idle Quality, Hesitation, Stall, MIL Lamp On | 
| Occurs | Always | 
Trouble Codes
| 22 | Coolant temperature sensor siganl abnormal shorted/open | 
| 24 | Intake air temperature sensor part of Mass Air Sensor | 
| 41 | TPS sigal abnormal | 
| 47 | TPS Shorted/open | 
 11 Replies Received
11 Replies Received
 11 Replies Received
          11 Replies Received
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