z28cam1993

Hi all. Very new to site but was given great info before now I have a slightly different problem.

I just replaced the fuel regulator back to stock. Also pulled all injectors sent out to be cleaned repaired and tested. And replaced plugs. Wires were msd new

Took alittle to crank over (been sitting 3 weeks), once it started you had to keep
Your foot on the gas at 2k rpms or would stall. A lot of black smoke when you hit gas than would taper off and very light cloudy smoke. Didn't smell nor was it wet. After I let off pedal
It immediately dies. Than I noticed a puddle of antifreeze on floor and sprayed in engine bay and plugs on opti were wet. Now I know I have a lot going on at once but any info at all would be awesome.

Injuneer

A problem with the coolant temp sensor could cause an excessively rich cold start on a warm day. See if the coolant problem is related to the temp sensor, or affected the temp sensor in the water pump housing.

Could also be a problem with the replacement fuel pressure regulator. Did you check the fuel pressure after the install?

z28cam1993

No I will continue tom and check the pressure now and see if better.

How do I test that temp sensor?

Injuneer

There's a temp sensor test procedure on shbox.com

I can't post the link because I'm on my phone.

There's a lot to be said for using Scan9495 (also on 93) to actually watch the sensor readings.

z28cam1993

Ok. That site is so informative. Thank you.

So from briefly what I told you does it sound like the dreaded opti? I'm going to purchase a spark plug tester tom to check every wire.

Injuneer

I would look at what I mentioned before suspecting the Opti. That's why a data log makes sense.

z28cam1993

Ok. I'm ordering the obd1 to USB cable to run scan program and see what happens. Thanks for your help

z28cam1993

Ok. I flashed the car today and received troubled code 15. I think that's Coolant sensor circuit-low temperature indicated. Now what? Do I replace the sensor?

moparman

Code 15 is the coolant temp sensor.

z28cam1993

Ok. So does the sensor just get replaced or do I need to do anything else

z28cam1993

Is it in the water pump or side of block? I remember last week my waterpump was leaking coolant maybe this is why

timnfxr

Water pump coolant temp sensor is the one monitored by the PCM. The driver's side coolant temp sensor is just for the temp gauge in the dash.

Have you tried resetting the PCM to clear the code? Does it return?

z28cam1993

How do i reset it? Car was idling and revving great finally. Went to go in reverse and died instantly.

Injuneer

Test the sensor and wiring using the procedure on shbox.com. Could be an open circuit in the wiring. Could be a faulty sensor. That's why I mentioned the sensor and the test procedure earlier.

z28cam1993

Yes you did mention that. You seem to know a whole lot about these cars. That's awesome. I'll read up on testing it tom