Truck won't start.

[Jimmy]

I was driving my truck and when got on it a little bit I heard a "pop" then the truck died.It won't start now.The ecm b fuse is good,it's got fuel pressure,the chip lights up,got plenty of juice to the starter.It cranks strong,but seems like it's got no spark.The only thing I noticed is that the tach doesn't move at all when I'm cranking it.Any ideas?

 

[bezerk]

checked your dist.?

 

[Jimmy]

It's a brand new MSD pro billet,I did check to see if it's loose and it wasn't.The truck is on the side of the road right now,I'm debating where to have it flatbedded.

 

[bezerk]

sounds odd, but i would take of the cap, and let some one start the truck, see it it''s rotating...

after that if:

you got a timing gun, or a used sparkplug around somewhere, you could double check if you have ignition/spark.

never heard a story about a timing chain going bad, but if that''s the case you prolly should have heard that while you tried cranking

 

[leroy]

Did you check the ecm 1 fuse?

Jim

 

[Jimmy]

Did you check the ecm 1 fuse?

Jim

That was the first thing I did. I'm sure the tach not moving points out the problem,but I don't know

 

[JSM]

I have heard of others having issues with the MSD dist.

I am suspecting you don't have any spark, might pull a wire grab a extra plug or screwdriver and see.

 

[leroy]

Did you check the ecm 1 fuse?

Jim

That was the first thing I did. I'm sure the tach not moving points out the problem,but I don't know

I figured so, but not everyone knows there are 2 ecm fuses. If you don't have spark, I'd probably suspect an ignition module next. A lot of parts stores will test your module for free.

You could run through the code 42 diagnostics to get a good idea how things work.

Jim

 

[ABLITZ]

I'm sure the tach not moving points out the problem,but I don't know

my bmw did the same when the ecm failed,might be the same for our trucks. :dunno:

 

[Jimmy]

ECM is good,probably the module or dist.Got no spark.

*edit* It was the ignition module :tup:

 

[jwaller]

try jeff's idea. put a spare plug on a random wire and lay it against something metal and see if you get a spark with somebody cranking. if not then you know it's a ign problem.

 

[SY2932]

Don't forget to pull the ECMB fuse when fighting a "no spark" problem. Your fuel pump will be dumping fuel into the cylinders everytime you crank it. I know at least one person on here hydrolocked his motor and bent a rod as a result. My $ is on ignition module took a dump.

 

[leroy]

Don't forget to pull the ECMB fuse when fighting a "no spark" problem. Your fuel pump will be dumping fuel into the cylinders everytime you crank it. I know at least one person on here hydrolocked his motor and bent a rod as a result. My $ is on ignition module took a dump.

That's always a good idea, even though the injectors shouldn't open without a distributor reference signal. You could have a distributor reference pulse and no spark in some cases....like a bad coil.

Jim

 

[Jimmy]

I hooked DM up to it,it's got no tach pulse at all.I'll update when I get it figured out.Thanks for the help guys. :tup:

**It was the ignition module.**

 

[Jimmy]

New GM module on my 6 month old MSD,it's only firing like every other time.I guess I'm gonna take it out and throw it in the garbage.What a waste of money that MSD POS was.....

 

[leroy]

MSD customer service is very good. They have replaced old things for me and sent me parts to make LSI coil wires for free.

I think they would be interested in failures and what caused them. Their tech line is 915-855-7123.

HTH,

Jim

 

[Jimmy]

Thanks Jim