no spark

[AKbigsub]

Here's the story: '90 burb, 5.7L TBI. It had no power and really bad mileage (6 mpg hywy). It failed our local emissions test due to it running really rich. I bought new cap, rotor, plugs, wires, and air filter. When I removed the wires from the cap, two posts were more coroded than I have ever seen (I ran a repair shop for 16 years) and two plugs had cracked ceramics (I may have done that when I removed the plugs). Install all the new parts and the thing ran GREAT! Passed the I.M. test (HC reading now at 87 @ 2500 rpm - was 2700 before). It ran fine to and from work today, but started it to run and errand and it was running really rough. It ended up dieing in a friend's driveway.

Towed it home and checked it out. It had not spark but was getting fuel. I found that the rotor was cracked, so I returned it and got a new one (exchanged the cap too). Put everything back together and started it up - NOT! Still no spark at the plugs. No spark from the coil either. I tested for battery power to the coil with the key on - it has battery power. I tried to go through the coil-testing steps, but could not get the probes from the multimeter into the connectors.

My question is, is there another way to test the coil?
what about the ignition module?

 

[4X4HIGH]

Most common failure point is the ignition module then next in line would be the pick-up coil (don't confuse this with the ignition coil). I would buy and install a new ignition module regardless since it is GM's downfall and if that doesn't cure the no spark issue then throw the old one in the glovebox as a spare back-up and then move onto the pick-up coil.

 

[Thunder]

Are there ant trouble codes? If not
Try replacing the ignition module before doing anything else.

 

[AKbigsub]

One A/C Delco coil and one A/C Delco ignition module later, the burb LIVES! Thanks for the input guys. I love this place.