Truck is leaving black dust like marks on pavement when i let it run in the morning looks like carbon dust comes off with finger. have an issue with the cat converter as well and doing tune up this weekend to see if that helps but whats the black stuff and what needs done? the exhaust is white like normal just leaves black stuff on the ground

SOURCE: chevrolet s-10 2000

My guess is that the crank position sensor is out of position, or possibly the timing belt has become worn. Backfires and the hot converter are the clues - fuel is in the intake at the wrong time, and the exhaust is rich in un-burnt fuel.

Harvey N Tawatao

• 3854 Answers
• Posted on Jun 25, 2009

SOURCE: 2ooo chevy s10 2.2 automatic starting issues

Try cycling the ignition on and off three times, Turn the ignition to the run till the check engine light turns off on the dash and then turn it off and do it again three times to pressurize the fuel line. Then start it, your fuel filter may be dirt or the fuel check valve at the fuel pump may be bad making you loose your fuel prime. Start with replacing the fuel filter first and let me know if that helps and let me know if cycling the ignition to pressurize the fuel line helped. 

SOURCE: 2002 Chevy s10 electrical problems

Not to well versed on the S-10 electrical system but I would take a look at the voltage regulator.
It sounds like there is a malfunction that charges your battery sometimes but shorts out the alternator other times. Try having it tested or replace it
WD-40 will not do the trick for cleaning your terminals. WD-40 was developed during the 2nd WW to combat moisture in radio equipment in the South Pacific. WD stands for water displacement and the 40 is for formula #40. To clean the terminals you must disconnect them and use an abrasive such as emery cloth to remove the corrosion. They should be brite and shiny when you put them back together. I always cote mine wit dei-electric grease before re-assembly

SOURCE: 2002 Silverado right rear wheel locking up.

check brakes if disk in back check e-brake pads for binding-check caliper possible faulty and is engaging --if drum pull and check for debris or shoes not properly retained sometimes one of the retaining springs break and get stuck between shoe and drum make a mess if brakes look good other location for problem would be the rear possible broken gear

SOURCE: I just replaced the catalytic converter on my 2000

black smoke is carbon have you changed the o2 sensor's??