'92 s10 Blazer 4x4 4.3 liter auto trans
Truck started fine right through the first time the temperature dropped
into the single digits.
When the temp went above freezing it suddenly got harder to start - I
now have to hold the gas pedal to the floor to start it when the engine
is cold no matter what the air temp is, unless the engine is warm. Then
it starts right up with just a touch of the key.
It has been tuned up, new cap, rotor, coil, and plugs. Wires are good,
no arcing even when wet.
Any thoughts about what to look for would be a big help.
Thanks in advance