service engine on not blinking

[wastedgate]

Hey guys, like your board dudes!! I have an 87 GN and when i try my scanner, no communication, i tried the old jump wire between a&b, nothing. I checked my fuses for the ecm all ok. Might it be the ecm that is bad?? Where is it located on this model??

 

[notacarlo]

What's the VIN#?

Probably 02 sensor crappin' out. Or a crappy gas cap.

 

[Dabigguy]

The ECM is behind the pass. kick panel. Does the car run? There's an orange wire near the battery that is the power for the ECM.

 

[wastedgate]

the car runs but breaks up when boost starts to build, also the tach is pegged all the time(no tach signal?)misfires through intake which tells me theres a timing issue. Took the ecm out, has a jegs chip in it but can't find stock. ordered an ecm from napa but prom doesn't come with it. Anyone know where I can get one stock?? Thanks for your replys

 

[86GN-862+2]

Tach and boost LED gauge failure is a
common problem with these cars and is nothing that can affect how the engine/computer runs to my knoweledge. My car has both of them pegged all the way up but I use mechanical/electrical gauges to read RPM/boost. I'd take the car to Autozone to have them read you out the codes. I also have a code reader that would not comunicate with my son's car computer but Autozone got me the codes with theirs. Maybe it's not compatible. When u did the bridge accross the a/b, was the ignition in the "on" position?

 

[GNVenom]

Check the bulb. Common problem for bulbs to lose their connection in the cluster.
Key on, not started, the bulb should blink, then stay on.

As for the tach/boost, that can be repaired - check Caspers.

 

[86GN-862+2]

Your dash gauges will probably need a resistor replaced that costs pennies on the dollar. I got me a good vacuum/boost gauge and a good tach instead. But that's me.
How did the misfiring start? Had it parked for a while? I'd lean towards a bad MAF but need more info on what happened.