Its a stupid question but wheres the electrnic spark control module on my 90 IROC Z PLEASE HELP

 

Ok checked my manual it shows a 87 model but the location of the 87 thers not a place for it on my 90 So dose it even have one.

 

In 90 they moved the esc circuitry into the computer. What kind of problem are you having? Mike

 

Very hard starting and no start after warm very bad idle and a up and down throttle with out moving your foot Code 42 in computer butt the ignition module is good I beleive its the pick up coil find out tomarro all ready replaced iac tps map fpr vac lines new plugs cap and rotor looked for broken wires and commpression check And cleaned throttle body.And it still runs like crap.