89 Full Size Blazer, TBI 5.7L
On first atempt when cold, acts like it wants to start, but then stalls.
Every attempt after that all it does is turn over and over but never fires.
-Plenty of gas, fuses are fine, battery @ 14.4v
-Replaced the plugs and wires because they were worn out anyway, but that
-Removed Cap and Rotor. Heavy corrosion, replaced both. Still no start.
-Tested the coil with an ohmmeter, turns out it was bad, replaced it, still
-Tested the plug wires with a spark tester and I see a spark.
-Tested fuel pump, you can hear it turn on for 10 secs at ignition.
-Fuel injectors spraying heavy into throttle body at ignition, doesn't seem
to have a problem with pressure. Strong fuel odor comes from under hood
after attempting to start.
-Checked EGR valve. It was stuck. Replaced it. Still no start.
-Testing ECM via SES light. It displays code 12 indicating system is
operational. No other codes flash.
-Tested power and ground to ESC, TPS, MAP Sensor, & Coolant sensor. All
-Checked Ignition module. Appeared to be in bad shape. Replaced it. Still no
Well, I have exhausted all my and the GM shop manuals resources and are
here to ask or additional help. Any ideas would be greatly appreciated.