1994 olds achieva no spark

[coolaid]

i have a 1994 oldmobile achieva and i have no spark i hooked up a scan tool to it and it said the crank sensor was bad! I relaced that and still nothing now i cant get a reading with any scan tool an dstill no spar what should i do???

[bszopi]

Which crank sensor did you replace? On a 3100, there are 2 - 1 behind the pulley and the other on the back side of the engine. The one on the back (which is a PITA to change) is the one that sends the signal to the ICM and therefore controls spark.

By the way, welcome to the site!

[coolaid]

i replace the pita one lol i didnt know there were 2 of them
but it will crank over and i had the coil pack tested and its good but still no spark

[bszopi]

Could be the ICM or the wiring from the CPS to the ICM.

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[coolaid]

how do i check that? and where are those located? if you know

[bszopi]

ICM is the module that the coil packs mount to. The wire goes between that module and the crank sensor (CPS) that you replaced.

[coolaid]

k ill try that an see what happens if it wrks ill let you know thank you

[TurboGTU]

If your lighter doesn't work then your diagnostics port won't work. Check your fuses. I don't recall having a code for bad crank sensor...unless its for the one behind the harmonic balancer. What specific code was it? What kind of scanner are you using?