Good video .had to ho from Phoenix to Ventura to pick up a step daughter and her car . Shop in Ventura quoted 950 and was going to change the coil packs plugs and wires . And then see what’s up . I said no way. We went on a surf trip snatched her up and came home . ChAnged 1 coil pack and ignition module . Still no start . Then I checked fused but missed the ING fuse for the module pink wire . I was looking at the Crank sensor when I looked at your vid and went back to the Fuse . And bingo I find them fuse blown . Replaced it . Turned key . Car fired … 350 with new battery .

Excellent Instructional Video!!!

Another thing that gives the same symptoms, is if you have antifreeze from a leaky water pump get by the crank sensor wire connector. It will short out the signal to the ICM and stop the spark and injectors and give no codes. Cleaning the connector and sensor with WD40 will make it work again.

Great information. I have an O6 that has had an intermittent can no start that everytime I try to diagnose seems to want to start. Today I was able to figure out there was no spark but then it started. I suspected crank sensor. Now im ready for the next time it fails to start.

Awesome video.

Good Video!! What a headache...I have a 2006 Lacrosse 3.8 doing the same thing... sometimes it starts and some days it just cranks and no start but no codes. I've checked everything except the crank sensor. I saw a video of a guy who said he had the same issue and had to clean the ground leads that attach tho the front of the transmission and that solved his problem. At this point Im willing to try and replace the CPS and clean the grounds.

So how do you charge for that? I am sure that no matter what you told the customer they would say it is your fault that it happened when you did brake line repairs. Oh and nice diag.

Great video! I have a strange problem: the crank sensor's signal wires show 1.76 and 0.68 Volts when the key is On position.0 Does not make signal or react to anything. I tried 3 sensors, all do the same. What could cause this? Gets power, ICM is good, I tried a new ICM too. Also when the connector is to the sensor is not plugged in, the signal wires read 5 V both.

At 111+ ft lbs how did you keep the engine from turning while tightening the bolt? I just used an impact wrench after replacing my crank sensor but still crank no start. And where did you get all those schematics? And what kind of diagnostic tool did you use? Also replaced cam sensor and still crank no start. Car ran fine for the eight years I owned it until it stopped running just when I drove into my driveway. Replaced ICM last year and all 3 coils the year before. I'm stumped.

Same issue on the 2007 buick lacrosse 3.8

Nice video, I have almost the same issue happening. I have 12 volts to the icm on the pink wire. I’m not getting the 12 volt reference out of the icm to the crank and cam sensors on the wt/blk wire N. I checked the crank sensor 1 and 2 the both were giving me pulses. I changed the icm and still do not have the reference voltage. I’m at a loss, I thought for sure the new icm would fix the issue. Do you have any suggestions? Thanks

On live data were you getting rpms? Having the same issue but i have rpm signal on live data on my scanner

I have an 05 lacrosse 3800. Had a stall and crank but no start afterward. Got p1516 code and searches and hunches led me to replace the crank sensor. Still wouldn't start. I poked around the connectors to make sure nothing was jostled and then it started up and ran until the habitual "check gas cap" message came up and it died simultaneously. I'll be replacing the cap and EVAP valves today and if it still doesn't start and run normally, I'm thinking it's the computer.

I have this problem but i have spark, still brokedown

Same problem. Fuel compression spark. No codes. Back fires occasionally But it will not start.

What was it called when you searched it up I've tried lower crankshaft position connector no luck

how much would you charge for this job

NEXT TIME, DISCONNECT THE WIRES FROM IGNITION COIL AND CRANK IT. THAT WILL SHOW YOU WHERE THE FAILURE IS, IF THERE IS NO SPARK IN ONE.