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Map sensor signal - Bias voltage?
I guess this is sort of another help request, but I know I can fix this on my own with a little more understanding... This truck starts and runs very rich for 20 seconds until SES comes on and sets a MAP code 33, every time. After which, it still runs fat but ... Login to read more. 
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46 Replies Received
46 Replies Received
| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1994 GMC K1500 Suburban SLE 5.7L
| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
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