OK.... Here's the story. I have a 95 Blazer with a Vortec w/160k miles on it. The thermostat went bad, and I overheated the motor, and the cyl heads warped slightly. I had the heads checked and .005 was needed to make them straight again. after re-installing everything, when I tried to fire it up, the fuel pump went bad.

SOO.... I finally replaced the fuel pump and sending unit (sending unit cracked upon removal) and the pump works. But when cranking the motor over it was acting like the battery waslow....... Hooked up a charger...... no difference...... Bought a new battery...... same. Turned the lights off in my shop to check for spark (I have spark), and noticed the Ground strap from the motor to the battery sparking. It was loose. After tightening, It still cranks slow, and every once in a while acts like it may start, but never does.

Sorry for the lenghty post, but I wanted to give you guru's all the info up front. I'm really at my wits end with this truck and have a TON of money into this problem already. PLEASE HELP!!!!

 

Did it get any coolant in the oil?

If you remove the spark plugs, does it turn over easier? How difficult is it to turn it over by hand.

 

turns over just fine by hand. no coolant in the oil. Oil changed. Plugs replaced.

 

Just trying to assess if there was damage to the bottom end of the motor.

Sounds to me like there is either a connection problem between the battery and the starter, or a problem with the starter itself.

How does it turn over with the plugs out? Or have you tried that?

 

Turns over slow. With the coil disconnected it turns over like normal.

 

So it turns over normal when you disconnect the coil wire with the plugs IN? Sounds like the timing is incorrect.

 

I set the rotor to the 6 on the dist. when the timing mark was lined up with v notch on the timing cover. Maybe it's off a tooth?

 

Off a tooth is not really a problem, so long as the distributor has enough adjustment to align it correctly. I suspect you may be 180 off, pull the cap, and remove the dist hold down, note where the rotor is pointing, and slowly pull the distributor straitght up, until the rotor turns freely, now, rotate it 180 degrees, and put it all back together. See if it wants to start.

 

95 blazers have NO timing adjustment. The dist. is fixed. Timing is controlled by the computer.

 

now it idles fairly smoothly, but i have to give it gas little by little or it dies. Timing?