2002 stalled and gauges start jumping . no engine light will not start just installed crank sensor. does anyone think ecm is bad

 

Have you checked the battery? There is a low voltage point where everything tries to turn on and off like it's lost it's mind. Check your voltage first, or better yet, take it to a parts store...have them charge and load test it, and then report back.

 

Have had this happen due to a bad alternator/battery as well,would check them too.

 

i checked the codes and got p320 again unpluged ecm for a minute and car started then shut down again

 

P0320 No Crank Ref Signal at PCM

The crank position sensors are a relatively common failing item, along with the occasional installed height issues. The wiring could also be problematic as I've seen a couple harnesses pulled tight and rub on the bellhousing and cylinder head. To properly diagnose, you should have someone scope out the Crank and cam sensors. If the Crank sensor drops out check for good power and ground on that circuit and you know your problem. If you have a scan tool, when the vehicle dies, you can read rpm information, if there is no rpm shown while cranking (best done with only the rpm and crank synch pids showing to speed updates) then crank sensor is also suspect. Some scan tools show Crank counts. This information also helps identify the Crank Sensor condition.You could also do an ohms test if the vehicle stalls and doesn't start for a period of time. If you read an open circuit until it cools off, it's time for a new crank sensor.

You could also have a wiring issue to the Crank position sensor, a bad pcm or other less likely issues, such as a bad cam position sensor giving unreliable information (position) and thus triggering a Crank code. If you have the sensor, and aren't going to return it, you could always install the new part and see if your symptoms disappear...

 

Thanks I took to a shop and waiting to here from them

 

shop said i need fuel regulator. does anyone agree

 

check your fuel pressure, if you have around 50 psi then id say fuel pump and regulator are fine

 

got back from the shop still stalling. gauges jumping and no engine light and still have crank sensor code I replaced crank sensor and no change