95 Lumina will not start

[dnbrice]

I was asked to open a new thread for this.

I have a 95 Lumina with a 3100 engine, 230K miles, and it will not start. It died out of the blue suddenly while driving. It will crank but will not start.

I have replaced the battery crankshaft position sensor, the ignition module, and tested the coils. I did confirm the fuel pump was working and that fuel was being delivered to the injector rail. I pulled the plug wires and tested that they did indeed have spark when cranking.

Upon reading my Haynes manual, I descovered the engine has two crankshaft position sensors. The one I replaced was the 3X sensor located on the side of the engine near the firewall. I looks like the 24X, whic is located behind the main crankshaft pulley is going to require more effort.

Upon writing this, I discovered in the Haynes manual instruction on testing the sensor before removing it using a multimeter and manually turning the crank shaft. I will post more on this after I have tested it.

Has anyone else had experience with this sensor failing? Is there another sensor or module that may cause this engine not to start that I am overlooking?

[xt477]

When the crank sensor on a friends Hyundai failed it would crank but had no spark. I think the computer locks out the ignition when it thinks the engine is not turning.

Does it sound funny when cranking? Have you checked the compression? I'm thinking more along the lines of timing chain/belt.

If you have fuel and spark only other thing is timing/compression.

[maxwedge]

Will it start by spraying carb cleaner in the intake, if so get a fuel pressure gage on and confirm proper pressure, around 40, befor diving into the cps. Also if possible check for cranking rpms on a scanner.

[john51md]

Originally Posted by dnbrice

I was asked to open a new thread for this.

I have a 95 Lumina with a 3100 engine, 230K miles, and it will not start. It died out of the blue suddenly while driving. It will crank but will not start.

I have replaced the battery crankshaft position sensor, the ignition module, and tested the coils. I did confirm the fuel pump was working and that fuel was being delivered to the injector rail. I pulled the plug wires and tested that they did indeed have spark when cranking.

Upon reading my Haynes manual, I descovered the engine has two crankshaft position sensors. The one I replaced was the 3X sensor located on the side of the engine near the firewall. I looks like the 24X, whic is located behind the main crankshaft pulley is going to require more effort.

Upon writing this, I discovered in the Haynes manual instruction on testing the sensor before removing it using a multimeter and manually turning the crank shaft. I will post more on this after I have tested it.

Has anyone else had experience with this sensor failing? Is there another sensor or module that may cause this engine not to start that I am overlooking?

I know it isnt the same engine, its a 3.8 but still a GM, my cousin had one that missed, everyone siad it has to be ECM, or Ign modual, they all said NO WAY a crank sensor could make it miss, it would either run, or be dead.
Well they were wrong, it was the crank sensor behind the damper on front of engine making it miss, just a warning that you "may" test ok with a meter, and it still be possible its bad. I know yours wont start at all, so testing should be more percise on good/bad