Hi! first post here, my friend has a 1997 Chevy Blazer, It was running fine about 6 months ago, then it started acting wierd, if it would sit for a while it wouldnt start, sometimes it would, then it wouldnt.. Now it will not fire at all, he checked and he says it doesnt seem to have spark, and will not fire even if carb cleaner sprayed into throttle body either, starting fluid, nothing, which sounds like a no spark issue. He replaced the ignition module, and that wasnt it. Also all the instrument cluster lights come on, so probably not a ignition switch. Any help greatly appreatiated. Thanks

 

Welcome!

How's the fuel pump? We have another BF member here who has a starting issue too. Is the starter turner over? Can the relays be heard clicking when you turn the key? More input would be great.

 

Check the Fuel Pressure (lays my money on this as its showin to be a more common issue with no starts)

Use an OMS metter and check to see if power is getting to the coil

Spark tester for spark to plugs (or hold on while someone cranks it, that will really give you a charge LOL)

(if no distributor) check the Crank sensor
(if distributor) check cap and rotor

 

if you have replaced the control mod and there is still no spark did you ever replace the coil?