98 s10 blazer no spark? was driving down the highway and it stalled lost spark
but recently the mileage on the dash dropped 30,000 miles but a week later came back? so maybe a computer problem?
changed the pick up coil,coil test good,ignition module good,changed the crank sensor....no spark still.. any ideas??? power at the pink wire but noticed no flash on white/black all fuses are good.. cap/rotor look a lil dirty so i guess i will change those too (i read the sticky for no spark but im still at a loss)

 

anyone?

 

i would try if you have a buddy with the same or close to blazer pull his ecu out and try it to rule that out

 

dont know of another but can get one from a local junkyard and give it a try

also forgot to mention after i replaced the crank sensor and hooked the battery back up the speedo and tach maxed out but later came down on there own

 

update..............
ok new computer in got power had spark but lost it now all signs point to coil no spark from coil now but pink wire is hot white/black is flickers ground

 

these might help you

https://blazerforum.com/forum/tech-a...anks-ok-45942/

Part 1 -Ignition Control Module (ICM) Test: GM 4.3L, 5.0L, 5.7L.

I found these using the search feature

 

yep ive went threw those already and i did have the ignition mod checked came back ok only thing not checked is coil so.........

(i also went threw the search option thanks tho)