Def seems weird that 3 cyl's would be lower then 1. Usually when you pop it it's one or two max that are low. I would retest the compression honestly before buying parts and throwing them at it. Just my .02

 

yeah when i melted piston #2 the other 3 cylinders still were within specs after my compression testing
i read 165 in #1 20 in #2 and 155 in both 3 and 4, but my motor was on its way out probably when i first bought the car so who knows.

 

Wait a minute , Like realllly loud popcorn ?

Because before it took a **** it was making reallllly loud pops when I was getting on it ..

Only once I would get to a certain point in the throttle it would make a really loud popping noise ...very rapidly like a stun gun ..

how loud was it, although I'm thinking it was the rocker arm hitting the cam but who knows.

 

1- 145
2- 133
3- 134
4- 140


This is the latest compression test at 5000 Ft .. Leak down doesn't leak .. WTF !!!! Do I take this intake mani off now hmmmmmm

 

what type of popping noise does it make like an afterburn type popping or something else???
try to record it and upload it on here

 

I don't think I could replicate the noise.

Honestly it sounded like Piston slap more of a loud tick . Like if a gear was striking another gear that was frozen , Really loud .... Pretty sure I just need to take the head off unfortunately .

 

good stuff im not hearing that yet i guess im lucky, i looked for leaks again today and shes still dry and shinny silver 8D wooo

 

Good numbers for your elevation. Time for a new injector I think. Does it EVER show misfire on a different cylinder? Mine moved around a lot but I think the LW Flywheel fooled the misfire algorithm.

 

It stays the same on that cylinder , always ... And that one has like maybe 2 psi difference than the others...

 

Not a valve or piston issue from what you posted on the leakdown & compression tests. If you are sure the cam follower and lash adjuster are ok on #3, then the injector is likely. If the lash adjuster or cam follower have a problem it might not show up in the cranking tests but it would be noisy at speed I think.

 

every springs on the exhaust side every other component looks fine I even tugged on the springs around that area to see if maybe one was hairline cracked or something .

it seams fine .. It seams like it's just not firing that cylinder correctly ..

I might need that tool so take a pic of it for me so I can see it and so others know what it looks like as well if you want !

 

It's just a shaping/sizing tool for the teflon seal, my wife is out of town with the camera, but I'll look around on fleabay for one.

Edit: Here's one...

http://cgi.ebay.com/ebaymotors/Kent-...motiveQ5fTools

EN-48266 is used to install the teflon seal onto the end of the injector. The pilot cone is placed onto the end of the injector, and the seal is started over the cone. The installer is used to push the seal into the groove on the injector tip, and the sizer is placed over the seal to compress it back to the correct OD to allow installation into the cylinder head. Unapproved methods will damage the seal, resulting in compression loss and oil or fuel comsumption.

 

Have a spare LNF Alt Rob?

 

Already sold it.

 

Son of bitch...****...

How about a coolant cross-pipe?

 

I've still got that, but its staying on the block until I decide whether or not I'm gonna use it. What do you need it for though? You shouldn't need that extra clearance.

 

I'm looking to revamp my hotside and intake giddup. More room the better...

 

Ah, the coolant pipe being in the way was never an issue for me. How soon would you need it? I'm probably going to get to work on putting everything back together here soon.

 

Can you guess what one has the problem ?






My valves looked like they are just completely caked with oil at 35k miles
Seafoam ? Do others look like this?




You can see that it had been operating like that for some time until it completely vaporized it..

 

My valves were caked up more at 50k than those. Same #3 injector missing a seal too.

You can use some solvent and an old toothbrush to remove the carbon buildup from the valve stem but you need to do it with the intake valves closed and blow it out with compressed air so it doesn't end up in the combustion chamber. Glad you found the issue. No teflon seal at all on #3, right?

 

Yup none on number 3 at all I searched with a snake LED flash light and others to see if it dropped off or was in the bore hole..

No trace of it what so ever.

This would cause sever misfire issues I would think

Whats funny is the lash adjuster and rocker that broke was on Cyl number 2 and the misfire is happening on 3 ...

As I understand its just 1 2 3 4 looking at them from the front ..

If you see inside that hole it's also black .. I am hoping this is the problem.

The rail pulled out effortlessly .....

 

Sorry to thread jack, but I'm pretty sure this is the noise my car makes under wot. It's like a stun gun noise, very rapid. When I put the tune on, it gets louder at times. I chalked it up to spark knock, then we thought it sounded like piston slap. Hmmmm. Can't wait to pull the valve cover. I may do a leakdown test as well as another compression test.

It's wierd that's there's been a few people with the seal missing on the #3 injector. So if you take off the intake manifold where you can access the fuel rail/ injectors, you can tell if its missing the seal without removing the injector?

 

You can't see it until the rail & injectors are pulled out of the head. I'll say it again. If you disturb the injectors in the head, the teflon seals need to be replaced. They won't seal properly if disturbed.

CED sells the injector seal kits. You need one kit per cylinder. The kit includes a teflon seal for the injector nozzle into the head, spring retainer to hold it onto the rail and blue o-ring for the injector to rail seal.

 

Ok. I'll add this to my list of stuff to do.

Also, the popcorn noise, was it coming from the exhaust or under the hood?

 

Thats kind of what it sounded like for me too but it was very rapid and it was while in boost and in the throttle , It's weird because the number 2 piston is what had the rocker arm thrown off and the lash adjuster damaged...


Maybe running higher fuel pressure isn't good on the seals ....

at 33 dollars a kit x 4 that's not very fun ...

The sound you describe is so horrifying you think the motors toast. Which mine might be but this is one hell of a start!