After getting some "bad cheap fuel" a few weeks back in my 2001 chev s10, with a 4.3 v6, now I have a long cranking before it starts. The crank sensor was replaced and the crank sensor relearn was done. It still throws a code of a misfire, sometimes a code of multiple misfires. it runs fine one it starts, but at highway speeds it will throw the code on the dash, yet still run fine. I dont know if the spider is clogged or the fuel pump strainers,[2] are clogged. I have fuel pressure and it maintains it, on the guage. It almost sounds like the timing is off a bit.
long cranking before starting, poor fuel mileage, 160k miles. tuned up at 146k.
The engine always started on the first crank. No it cranks for 5-10 seconds
before it slowly starts.