I may have posted a year ago or so about my odd slow crank issue on my K1500, but here's an interesting read/update that seems to have the mechanic puzzled too. It has the 5.7 Vortec and a direct drive starter. When I drive it around town or on the interstate and stop for a short while (5-10 minutes) and then hop back in and go to start it, it cranks over slow...so low that after the first crank it seems to hang. The second crank or so it usually starts, but it acts like I might be stranded because of how long the hang lasts.
I replaced the starter (with another direct drive) in July along with the positive battery cable, did a tune up in in in August (plugs, wires, cap, rotor) and had the battery replaced a year ago. All this needed to be done anyway for various reasons, so not a big deal.
This past Monday I took it to a well known, trusted mechanic in town. They've been doing various things to it to track the problem down. They replaced the battery since the battery went bad (this is the third one in a year and a half! How??), and the negative battery cables. It's still doing the slow crank. They also said it doesn't exhibit the symptoms of a faulty crankshaft position sensor.
Next thing they will be testing tonight/tomorrow is something in the distributor. Has anyone else heard of this or experienced it? It seems really odd...my dad's '88 TBI has never had a slow crank issue with a good battery, but this Vortec seems to really enjoy being bizarre about it.
I replaced the starter (with another direct drive) in July along with the positive battery cable, did a tune up in in in August (plugs, wires, cap, rotor) and had the battery replaced a year ago. All this needed to be done anyway for various reasons, so not a big deal.
This past Monday I took it to a well known, trusted mechanic in town. They've been doing various things to it to track the problem down. They replaced the battery since the battery went bad (this is the third one in a year and a half! How??), and the negative battery cables. It's still doing the slow crank. They also said it doesn't exhibit the symptoms of a faulty crankshaft position sensor.
Next thing they will be testing tonight/tomorrow is something in the distributor. Has anyone else heard of this or experienced it? It seems really odd...my dad's '88 TBI has never had a slow crank issue with a good battery, but this Vortec seems to really enjoy being bizarre about it.