hi i have a 95 Z-28 and it has a problem staying running. you can start it and it will run fine and then it will spit and sputter and then die. the chech engine light will come on the my code reader will sat 16 low res pulse circuit falure. any input should help. thanks

 

Ok heres the deal. A code 16 is a bad opti code. I am on my 3rd opti so i am pretty good at this. There are 2 opti codes. Code 16 and code 36. From my experience, you can go a while throwing just the code 36... But as soon as it starts throwing a code 16... Its time for a new opti. So yes, i would say. NEW OPTISPARK TIME. Call Jason Cromer at 1-850-243-8826 for the cheapest price you will find. Good luck



Chris

 

Try this as it may not necessarily be the opti.
The wires from the opti have a connector about 2 feet from it. Disconnect it at that connector and probe pin A which is the red/black wire on the side going to the PCM. Don't probe the connector side that goes to the opti. With the other lead on ground, turn the key on but don't crank the engine.

(1) If the voltage is less than .5 volts DC, either the low res. wire is open or grounded. Or the PCM connection is faulty or the PCM is bad.

(2) If the voltage is greater than 6 VDC, the low res signal wire is shorted to battery voltage.

If the voltage is between 4 and 6VDC, turn key off. Reconnect the connector and disconnect it at the opti this time. Now probe that connector just as before on the red/black wire with the power on.

See (1) or (2) above as before. If the voltage is 4 to 6 volts now, you either have a faulty opti connector or the opti itself is faulty

 

Here's a related question. DTC 36. The manual says the car will run. But what if instead of seeing a Faulty High Res Pulse, the opti is sending an extra Low Res pulse. Would that not cause the car to run somewhat off a little???