Identify Hoopty’s noise!!

[mwilson]

Its all fixed, what do you think it was??

 

[NIsaacs]

Belt tensioner

Nick

 

[mwilson]

I wish.....

 

[fest3er]

Doesn't sound quite like a wrist pin, prolly not a valve. Maybe failed exhaust gasket, or holed or cracked exhaust manifold or pipe.

 

[mwilson]

It had a dead miss and you could smell gasoline ever so slightly....

 

[NIsaacs]

Exhaust valve not opening....the sound is the exhaust, exiting on the intake stroke.

Nick

 

[B.G. Smith]

Spark plug out of hole. bg

 

[mwilson]

Spark plug out of hole. bg

We have a winner!!!! Details later..

 

[TFucili]

You mean Hoopty has a 5.4 Ford in there???

 

[mwilson]

You mean Hoopty has a 5.4 Ford in there???

It's gotta' be related....or a Cadillac engineer went over to Ford when they were developing the Triton........

When I get to my room tonight I'll lay out the story...it had me stumped for a while...

 

[B.G. Smith]

If you make too many hard right turns it sometimes will loosen the spark plugs. bg

 

[GCroyle]

Houpty imitating a shop air compressor.

Yeah, I peaked at the answers.

Got threads?

 

[mwilson]

Ok, here is some of the story. May run out of steam before I finish..

Started Hoopty with remote start Monday morning. I always back it in the driveway (dooryahd in local dialect) so when I step out of the garage door I come up behind it. Stopped and listened, had a slight skip...very suttle “foof, foof noise. No big deal, I’ve had two of these Northstars and they both would do that from time to time.
Drove the 63 miles to work and thought no more about it.
Left work Monday night, stopped at the first traffic light and it started skipping hard. Then it smoothed out. Needed gas so went to the Irving and noticed the skip was back again. Filled it up and when I started it that time it sounded as it does in the video.
Drove it back over to work, finally found a company truck to take home and parked Hoopty out back.
The engine has three timing chains and in some cases a tensioner will crap out, relaxes the tension and jumps time. I was stuck thinking it was a timing issue as I pondered things on the way home. After a good nights sleep I decided it started too good to be timing.
I arrived at work and announced I was off the clock until I had time to evaluate the car.
Put my code reader on it and after a couple minutes of idling a code for a #6 misfire came up...Hah, bad coil pack.
Pulled it and it had a split boot. Original part so I went over to Advance and grabbed a new one. Put it in, still skipping but misfire code gone. Other codes though.

Decided to swap #6 and #8 to see if anything changed......pulled #6 coil and the spark plug came right out with it, the new boot had suction enough to bring the plug . Well there, I found the problem..

The coil pack held the plug somewhat in place, on second inspection of the old coil I could see where the bouncing plug had been shoving the internals of the coil pack...plug couldn’t get out..

 

[mwilson]

More tomorrow...