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1989 Chevrolet C1500 Cheyenne 5.7L No Closed Loop
Well..., ECM never enters Closed Loop. Data stream showed coolant temperature at 145Deg and steady, so we changed thermostat. Now it shows coolant temperature above 195Deg; MAP voltage about 0.9vdc; O2 voltage normal at idle. At cruise, O2 voltage drops off to...
Summary posted 2/29/2008
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Message Closed w/Summary
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Related Documents & Media | VIN | 2GCEC14K0K |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / TBI |
| Emissions | OBDI, US Fed emissions |
| Symptoms | No Closed Loop |
| Occurs | Always |
Message Closed w/Summary
Vehicle Data
1989 Chevrolet C1500 Cheyenne
| VIN | 2GCEC14K0K |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / TBI |
| Emissions | OBDI, US Fed emissions |
| Symptoms | No Closed Loop |
| Occurs | Always |
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