No Spark

[CallSignChunk]

Alright team,

So I tried replacing my maf,

And first time taking it out to clean... No problems.

Second time to replace..... Truck doesn't have any spark.

I did put a voltmeter up to the pins to see if there was any current, and there was a small blue spark, and now nothing. It turns over just fine but this beast is going no where fast.

Thoughts?

Thanks for your time.

 

[Smog-guy707]

Are you sure you didn't leave something disconnected? There is a small box near your airbox, which I think may be an ignition module or something. Maybe you disconnected it while doing the MAF and forgot to plug it in?

Just a thought

 

[CallSignChunk]

Everything is hooked up.
I tested the ecm for power going to it on the B+ and e1 terminals and it came up as 12.6 v so I'm sure the ecm is getting power.
I'm just hoping it's not an ecm issue.

 

[CallSignChunk]

So, today was fruitless.

Symptoms are as follows,

1. Complete lack of spark
2. No check engine light when attempting to start
3. Incapable of pairing with OBD II scanners.


I don't want to say it but I feel like it's the ECM.

Anybody out there have any other thoughts?

 

[Doc2012]

No way.

There's no way that unplugging your MAF caused your ECU to go bad.



You've got a bad ground, or something disconnected somewhere that is causing this problem.

Checked your fuses? Could be a bad wire arc'd when you unplugged the MAF.

The CEL is supposed to be on when you turn it to the acc position. It stays in and then goes off when the truck starts, unless you have a code.

Edited because I'm sleep deprived and fixed what I meant to say.

 

[19963.4lsr5]

The spark you saw probing the pins..........did you find any blown fuses? Aka ignition or a secondary pcm fuse????

 

[CallSignChunk]

I've checked fuses , relays, grounds. Everything I can think of. The CEL doesn't comm on in the acc or any position. I'll keep you guys posted as I work through this more

 

[CallSignChunk]

My appologies to everyone whose time I've wasted.

After three days of fiddling and diving into tech and schematics, my drunk neighbor came over and pulled one fuse. Just one.


And noticed it happened to be blown.

I feel like such an amazing noob, I can't even begin to describe it.

So. Thanks for everyone's time.

Lesson learned. I'll be screening my posts with much more scrutiny from now on.

 

[IBallEngineer]

My appologies to everyone whose time I've wasted.

After three days of fiddling and diving into tech and schematics, my drunk neighbor came over and pulled one fuse. Just one.


And noticed it happened to be blown.

I feel like such an amazing noob, I can't even begin to describe it.

So. Thanks for everyone's time.

Lesson learned. I'll be screening my posts with much more scrutiny from now on.

Some lessons here.

First, always check the easy things first.
Second, there is a correct way to check fuses, more than one actually but there is also the infamous"they all look good". Which is SO wrong.

Always use a test light or DVOM to test fuses, ALWAYS.

:shrug:

 

[sl0annuggets]

What fuse was it?

 

[jeremyc74]

What fuse was it?

Since he saw a spark while probing the MAF, I'm going to guess its an ECU fuse (I think there are two).

 

[TheDurk]

Some lessons here.

First, always check the easy things first.
Second, there is a correct way to check fuses, more than one actually but there is also the infamous"they all look good". Which is SO wrong.

Always use a test light or DVOM to test fuses, ALWAYS.

:shrug:

I know somebody who posts that ALL the time.

(Sub in a known good fuse is also allowed....)_