Starts and runs for a half second, then dies...

[ridefst]

2003 V8 with 130k on it. I've had it for a couple of years, no serious problems.
Now two days ago, I was about a hundred yards from home and it just shut off. Just barely coasted into my driveway - got lucky there I guess.

Now when I try to start it, it fires right up, runs for about half a second (just long enough to come back to idle RPM) and then it dies with no error/check engine/etc.
I checked for codes just in case, but there's nothing.

First thought was fuel, so I pulled the rear seat. I could hear the pump cycle for a few seconds when I turned the key, checked fuel pressure at the rail and got about 37psi, so that seems fine.

Not sure where to go with this next though - almost has to be some computer/sensor related thing, since it cranks and starts up so easily - but that could be almost anything as far as I know.

Any advice?

 

[joegr]

Disconnect the MAF sensor and see if it will then start and keep running.
If it will, look for dirt or a bug on the sensor wire.

 

[ridefst]

Disconnect the MAF sensor and see if it will then start and keep running.
If it will, look for dirt or a bug on the sensor wire.

Check out the big brain on joegr!

Just got back from doing exactly that - found another thread (via google, didn't find anything helpful through the site search) that suggested the MAF.

Pulled the plug, and it started right up.
Took it out, and found a tiny bit of a butterfly wing, right across the two wires!
Removed that, reinstalled, and it runs perfectly again!

 

[M4rk]

Joe is the man, yet again.

 

[LS4me]

Took it out, and found a tiny bit of a butterfly wing, right across the two wires!

KILLER!!!!!!

 

[G-RELL]

thats what you get for killing one of gods beautiful creatures... MURDERER!!!!!

 

[1LoudLS]

that looks like an awful big piece of debris that made it through (or around) the filter

 

[ridefst]

Oh man, tough crowd eh?
We don't know that I killed it, may have only maimed it... ok, not sure that's any better...

Yeah, I was wondering about the filter too - really ought to have taken care of this. The rest of the butterfly wasn't on the filter, the filter is really clean still - maybe it's just a little piece that dropped in last time I changed the filter (last fall) and finally made some trouble?

 

[NYC LS8]

Joe's the man. Glad it was something easy.

 

[hite337]

Go joe!!