Fires then dies. HELP - Page 3 - ZR-1 Net Registry Forums

XfireZ51 · 1 Day Ago

R u sure its the cam angle and not the crack sensor?

Ozruss90 · 18 Hours Ago

Quote:

Originally Posted by XfireZ51

R u sure its the cam angle and not the crack sensor?

I?m assuming a typo and you meant CRANK sensor. No, I don?t know. The only reason why I have referenced the CAM angle sensor is that this, fire up and die straight away, situation started when I went to re start the car after pulling the cam angle sensor out to replace the O ring due to an oil leak
Should I pull the CRANK angle sensor out to check, and test (if possible) ?

Cheers, Russell 🇦🇺

RSLyrick · 16 Hours Ago

I think that you would get no spark at all if the crankshaft position sensor was faulty, as the ignition module selects which coil packs to energize based on the sensor output. Your engine is starting and holding for a while and you checked that you had sparks, that already sounds good to me.

If this sensor is working fine, you should logically get RPM readings as well.

If you want to test it (we never know), there's a nice method provided in the FSM which allows you to test without removing the crankshaft position sensor from the engine and make it easy to test (see 6E3-A-32) :

1- Get yourself an engine coolant temperature harness from a 1985-1989 C4 (PN : 12046623)
2- Unplug the actual sensor harness from the sensor and plug the floating engine coolant temperature one in with the two floating leads.
3- Measure the resistance between the leads
4- Should be a value between 965 and 1075 Ohm at 25?C (77?F) for a working sensor.

In any cases, try to give a quick call to Marc. Please, give us a feedback about it, I'm interested!

1 Day Ago	#21
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,700	Re: Fires then dies. HELP R u sure its the cam angle and not the crack sensor? __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

16 Hours Ago	#23
RSLyrick Join Date: Oct 2023 Location: Germany Posts: 6	Re: Fires then dies. HELP I think that you would get no spark at all if the crankshaft position sensor was faulty, as the ignition module selects which coil packs to energize based on the sensor output. Your engine is starting and holding for a while and you checked that you had sparks, that already sounds good to me. If this sensor is working fine, you should logically get RPM readings as well. If you want to test it (we never know), there's a nice method provided in the FSM which allows you to test without removing the crankshaft position sensor from the engine and make it easy to test (see 6E3-A-32) : 1- Get yourself an engine coolant temperature harness from a 1985-1989 C4 (PN : 12046623) 2- Unplug the actual sensor harness from the sensor and plug the floating engine coolant temperature one in with the two floating leads. 3- Measure the resistance between the leads 4- Should be a value between 965 and 1075 Ohm at 25?C (77?F) for a working sensor. In any cases, try to give a quick call to Marc. Please, give us a feedback about it, I'm interested!