Messages

1

General Buick Tech / Re: GN Won't Start

« on: September 23 2017, 12:29:51 AM »

It runs again!!

Pushed it off the street and into the garage and started testing wires and signals.

Turns out the screw holding the cam sensor window came loose. I am not sure why I didn't have any spark but we pinned out the ign module it had 5 volts at the signal wire the whole time we were spinning the engine. I would assume that if it failed and had 0 volts the whole time we spun the engine I would have spark.  I used Loctite this time to ensure it stays!! At least it was a simple fix

 As for the no SES light. It still doesn't come on when the engine isn't running.

 Thanks for all the help everyone 

2

General Buick Tech / Re: Front Block Cam wear?

« on: September 22 2017, 01:08:31 AM »

  Good news: Another Buick is up and running thanks to help from the Buick community. It took a fair bit of troubleshootin g (even though it didn't need to)

 The cam sensor screw which holds the metal tab into the cam sensor shaft and the hull sensor came loose. I just replaced it but used Loctite this time. 

 What is interesting is that the cam sensor stopped sensing completely which made the car not spark or injector pulse (crank sensor is what I thought). I was sure it was either a crank sensor, ign module or computer problem.

 I had the laptop hooked up to the FAST system and came up with a "cannot connect to ECM" message which pointed at the FAST system being FUBAR. Damn computer!!

 As a sidebar: I still don't have an SES light with key on and engine not running. Not sure why not but I don't care as long as the car runs!!!

  Glad I live in Victoria as there is a few weeks of summer still left.

  Thanks again for the help everyone!!!

 Go LEAFS!!

Wayner

3

General Buick Tech / Re: GN Won't Start

« on: September 11 2017, 12:55:47 PM »

That is what mine looks like. I will continue down the SES troubleshootin g and the "no start" tree and see where they take me. Summer is almost over 

4

General Buick Tech / Re: GN Won't Start

« on: September 07 2017, 11:09:33 PM »

Hello everyone!

Update: I checked the cam sensor and it is timed correctly and spinning when I turn the crank. Also, checked the and valve timing is correct.

I have been pretty busy camping with the family but will work on the SES light tree next!

My old crank sensor was the old style and the new one is the new style. Will that affect anything? The mount is the same from what I can tell

Thanks!! 

5

General Buick Tech / Re: GN Won't Start

« on: August 25 2017, 10:26:26 AM »

  Wow!! Thanks for the welcome and all the good ideas!

I replaced the cam sensor about 6 months ago and it has been driving great. I will take the cap off and see if it spins.  I just replaced a valve spring on the drivers side and need to replace the gasket. I will verify cam timing and valve timing when the cover is off. The engine was rebuilt in 2008 and not sure of the timing set that it is in it.

There is a laptop connection for the FAST system so I might have to dust off the old laptop running XP and see what it has to say. It has 3 lights on the Caspers adaptor indicating 12V, sensor and standby. All 3 light up when I start cranking


Thanks again everyone for the help!! 

6

General Buick Tech / GN Won't Start

« on: August 23 2017, 10:25:26 AM »

  Hello everyone. I am new to IHADAV8 and hoping for some help. I drove the car for a few days in a row and then I went to start it in the morning and not even a kick.

I have no spark and I used a noid light to figure out I have no injector pulse.

I have fuel pressure and can hear the pump running.

I have checked all my fuses (CCCI, ign etc.) even replaced them with known good ones just to be sure.

I have checked the orange wire going from the battery to FAST system and all is good.

I have replaced (and tested) the crank sensor. I have rotated the crank by hand while using a multi meter and have sensor voltage when the ring passes the hull.

I have replaced the ignition module and coil pack with one that I had. I have also borrowed one off of my friends GN which works great on his.

I have checked all the grounds and also used multiple jumpers to add grounds just to be sure.

The only thing is that I don't have is an engine service light. With the classic FAST system will you have that on? I don't ever remember seeing it on. When my cam sensor failed I noticed I didn't have the service engine light on. Once I changed the cam sensor I don't remember if the light came on or not?

Anything I am missing?

Thoughts...

Thanks!!!!