Misfire, Part MVIXXIVIIXXI

This is getting old.

Thought I was good to go after cleaning out the injectors & rails. NOPE.
Found a burnt plug wire and one with a nick, so I replaced them all. That was last week and 200 miles since then (and about 2+ hours straight of driving and looking at houses), and all has been good until today. Running about 80 mph on the highway, it starts to miss again. Exited and got to a light, and it is misfiring the same way again. Checked everything I could, but no luck.

Killed the truck & restarted, performed that cycle about 5 times, then it starts and is fine. Shook out all the wiring and harnesses to no avail. Drive off, and about 100 yards and starts again. Killed it, let it sit for 20 min, started right up, purred like a kitten all the way back (15 miles). Even stopped at the dealership to talk to my buddy about it, and it still ran fine. Drove back to work, everything is cool. Killed it, left work about an hour later, drove home and all is fine.

I am stumped why it would act like this?

Did you ever check your grounds? Do you have a ground going from the battery directly to the engine block?

Are you running 60lb inj? If so I wonder if some in the know would know if the versafueler or something similar will help.
http://www.ls1truck.com/forums/power...rsafueler.html

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Did you ever check your grounds?

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:bash:
Umm, yes. :o And ummm, they were tight :rolleyes: right after I just tightened them!

What are the odds 2 ground wires at the rear of the block on top were loose?
If that fixes it, I will by you a case of whatever you like to drink (limited to beer budget!)

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Do you have a ground going from the battery directly to the engine block?

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Yes, the large ground. Smaller ground goes to front of frame.

I hope that was it Greg. :thumb:

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Originally Posted by zeake

Are you running 60lb inj? If so I wonder if some in the know would know if the versafueler or something similar will help.
http://www.ls1truck.com/forums/power...rsafueler.html

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Yup, 60 #ers.

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Originally Posted by SCIV

If that fixes it, I will by you a case of whatever you like to drink (limited to beer budget!)

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Do you deliver? :laugh:

You're a genius Greg.

Like to the point of pissing me off. :lol:

But you're a genius.

funny how its always the last thing it could be, that fixes it...:whack:
good job red!

We discussed it in an earlier post, someone just didn't check it back then. :laugh:

Its kind of like when you lose something, you always find it in the last place you look. If you found it, why would you keep looking for it? :duh: :rofl:

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Originally Posted by RedHeartbeat

Do you deliver? :laugh:

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Sorry, a man has his limits!!

Give me your Fedex or UPS shipping account, and it will be there tomorrow!

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Originally Posted by RedHeartbeat

We discussed it in an earlier post, someone just didn't check it back then. :laugh:

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Not entirely true, I checked the easy ones!

so far so good?

We need an Update SCIV .....

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Originally Posted by casey23

We need an Update SCIV .....

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Ya, did Red get the beer or not???:LOL:

Red gets the beer, or libation of his choice. He just won't tell me what he wants!!

It was the two ground wires at the top of the block in the rear. I think Greg said they were the O2 grounds or something along those lines. Get this, it also cured my Interceptor gauge problems too!

I goes without being said here sometimes, but I will say it again...
This site is in debt to Greg for all the help, knowledge and patience he imparts to us.
:hshake:

we should just call this site. ls1greg.com or gregsls1trucks.com. something along those lines