I'm looking for a little help here guys, I'm lost... I just finished my LS1 Miata and I'm having a misfire issue. I found out I'm not getting any spark on the drivers side of the motor. I swapped the passenger side coils (which did spark) over and they wouldn't spark either. I plugged the volt meter into the coils and I'm only getting 12v on the passenger side.

Codes I am getting:

[PCM] P0200 - Injector Control Circuit (SES) (Old) (History) (Current) (Immature)
[PCM] P0300 - Engine Misfire Detected (Old) (Immature)
[PCM] P0463 - Fuel Level Sensor Circuit High Voltage (Old) (History) (Current) (Immature)
[PCM] P0645 - Air Conditioning (A/C) Clutch Relay Control Circuit (Old) (History) (Current) (Immature)
[PCM] P1637 - Generator L-Terminal Circuit (Pending) (Old) (History) (Current) (Immature)


Continuous Tests
Misfire: Complete
Fuel System: Complete
Comprehensive Component: Complete


Once Per Trip Tests
Catalyst: Complete
Heated Catalyst: n/a
Evaporative System: Complete
Secondary Air System: Complete
A/C System Refrigerant: n/a
Oxygen Sensor: Incomplete
Oxygen Sensor Heater: Complete
EGR System: n/a

I'm running a 98 Corvette LS1 with a 2001 Camaro stock harness.

 

How do you have your relays wired? Both banks of coils have their own power wire that needs you need to hook up to a relay. From the sounds you might have only given power to the passenger side coils.


Edit: I just noticed you're running a 2001 harness on a 1998 motor. I know the '98s are different, but I'm not positive what you need to change. Maybe somone with experience with that can chime in.

 

Is the PCM a 98 or an 01? The ECT switch on the driver's side head is a (3) wire on a 98 & a (2) wire on an 01. More critically, the PCM pin outs are different on an 01 PCM than a 98 PCM. If you are using the 01 harness on a 98 PCM, you need to re-pin the PCM for the harness. Google a 98 PCM pin out diagram & an 01 diagram to find what needs to be changed.

 

I am running a 2001 ECU.

I have the 5 pink 12v switched wires connected to one 30AMP fuse and the 2 orange wires connected to a 12v constant.

Do you guys think that all the pink wires connected to one fuse without a relay is the issue? I'm not blowing the fuse that they are connected to. Thanks for the help so far guys.

 

Is the circuit grounded? All (4) black wires from coils to ground? I'd also use the relay.

 

I didn't know that I had 4 ground wires in the harness...

I only have 3 grounded to the head.

 

Only (3) do go to the head. The others go to the chasis or a fuse block ground. The (4) coil grounds meet @ one black ground wire that grounds the circuit. You may already have it grounded. If not then, once grounded, you may blow that 30 AMP fuse. I'd do the relay @ the same time.

 

What size relay would you recommend?

I'm a little confused on the ground I am looking for. I have the wires in blue grounded to the driver side head. The one in red I deleted and replaced it with a ground strap. Thats all I have grounded.

 

IDK, there is a ground that comes from the connector that plugs into the coils on that side. The wire is black. My schematic shows that it runs to chasis ground. Make sure that the black wire from that connector is grounded & them move on to the next.

 

I know this thread is old but did you ever find your problem? I'm having the same issue.

 

having similar issue except 2 coils on each side are firing and the other 2 are not firing, did you ever figure this out ?