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94 Yukon 350 Idle issues and Loss of power.

If you are able to get a scan tool that reads live data, monitor the temperature the computer reads to see if it matches the dash. I had a fueling/flooding problem once due to it bouncing between -40 and 300+ once. Note: The temp sensor for dash does not feed engine computer, it has its own.
- MBski
- Post #26
- Nov 13, 2023
- Forum: Engine Performance + Maintenance
M
93 TBI 5.7 Pouring tons of raw fuel when key turned on

This sounds a little like the intermittent problem i had with the coolant temp sensor (the one that feeds the ECM, not the one that feeds the gauges). The GM scan tool showed it was reporting like -30 degrees at times which triggered the ECM to dump lots of fuel into the throrrle body. I think...
- MBski
- Post #14
- Nov 20, 2021
- Forum: Engine Performance + Maintenance
M
92 5.7 random dies at idle

Here's another thought...Does it flood when it stalls? As recent as last week, my brother believes he's finally found the problem with my 93 5.7L TBI. It would stall/no restart and in the worst possible locations. Eventually it would restart but that was usually after it was unloaded from the...
- MBski
- Post #5
- Dec 14, 2020
- Forum: Engine Performance + Maintenance