Hi everyone I have a 1988 iroc z and I did a ecm swap with a remanufactured one from the parts store and now my car won't crank at all. I tried the leave bat unhooked for 15 min and key in on pos for 10 min off for 30 and try to start nothing. Everything lit up and seem to be getting power but no crank. Tried the 11 min on 30 sec off 3 times and nothing either. I thought my 88 didn't have a vats but I tried anyways. So then I swapped back the the ecm I pulled out as the car srarted and kinda ran before I swapped ecm and not this one won't crank either. I guess if their both bad maybe this is the cause but I can't find any help on the web so I thought I'd ask the community I also did the 15 min off bat and 10 min in on pos and nothing with either ecm. Any ideas or help that's everyone

 

Being an 88, your car doesn't have VATS, no resistor pellet in the key. Wiring for start circuit goes from ignition switch to P/N switch (or clutch switch if manual trans) to starter solenoid (ppl wire). With key in start position you should have 12 volts at the ppl wire on the solenoid. HTH!

 

The ECM has nothing to do with the starter not engaging. Even if VATs was present. It is as bigal55 posted.

RBob.

 

Well I traced power leading out the firewall to the starter. Tho I'm just a smige to fluffy to slide under the car jacked up I have it a try and just couldn't get under clear enough to put the fluke on the starter. Tho I'm really not thinking that's the problem. Like I said she fired up and ran before I swapped ecm's out and now she does everything but crank for me. Well I have on order another refurb ecm so we will see what happens tomorrow I suppose. Tho I swapped the prom out check engine light
Comes on when I go to turn it to the on pos have power coming from the ign to the harness out the harness and out the fire wall.
Guess I'll see about jacking the ride even higher up. But I have replace so far, mass air flow 3 times, both relays for mass air, eng coolant sensor, icm, ecm and with all that is would fire up and run just not very long. Run scan and 33,36 over and over even replacing the parts over and over witting looks old but fine no cracks. Just let her sit to long I guess. I'll let ya know if I squeeze under the beast or not in a bit

 

Okay I have power comming out the fire wall where does it go next as fluffy got under the car and tested the wires for what I could them being hooked up and the purp being in the background but I could poke around and get 12v hot wire and the purp lead I couldn't get a clean read on it fluttered a bit from time to time but I couldn't get a solid volt reading what do u think? I'll have a new refurb tomorrow so if you have any ideas let me know

 

You need to check the P/N safety switch (clutch switch if manual). Here is the wiring diagram.