Low Cylinder Pressure on 3 Cylinders 2020 Roush Stage 3

[m3incorp]

My coworker has a 2020 Roush Stage 3. He had it tuned, smaller pulley, aftermarket oil pump gears. Drives like a madman and recently had multiple misfires.

This is what the cylinder pressures look like. It looks like this could get to be a little expensive, depending on what is found when the dealer gets down to the valves.

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[Cory S]

Gasoline? Potential ring land failure.

 

[DrZed]

... that power balance test in advanced scan tools is so freekin' incredible. I was watching FordTechMakuloco do these tests before even touching a darn thing mechanically. Incredible.

Sorry to hijack, sorry for your bud that really sucks.

 

[Cobra Jet]

Just look at it like Alignment Techs do - there's more green on the chart, so "it's all good" . . .

 

[m3incorp]

They are supposed to start the tear down this week. I know he drives it hard and puts it away wet as they say...so hard to say what the real cause may be. Hopefully for him, there isn't too much damage.

 

[hlfbkd420]

Did the dealer mention the tune?

 

[m3incorp]

Considering he is one of those that has stickers all over his car advertising everything he has done to it, not hard for the dealer to notice. He isn't trying to hide the fact that it has been tuned and is bracing for the repair bill.

 

[hlfbkd420]

That’s good. Hoping it’s not too bad!

 

[m3incorp]

That is what I told him also.

 

[hlfbkd420]

Is he On pump gas with the smaller pulley?

 

[m3incorp]

Yes, as far as I know. He hasn't mentioned e-85.

 

[Cobra Jet]

Well, if at all possible, see if he can get borescope or any other pics from the tear down.

Out of curiosity, you mentioned he did aftermarket OPG - any knowledge as to what brand was used?

 

[m3incorp]

I don't know what brand he used but can ask him. He said he had them installed when he had the smaller pulley done.

Well, if at all possible, see if he can get borescope or any other pics from the tear down.

Out of curiosity, you mentioned he did aftermarket OPG - any knowledge as to what brand was used?

 

[Jackson1320]

I don't know what brand he used but can ask him. He said he had them installed when he had the smaller pulley done.

If you guys could do the work a short block is only 2k

 

[ice445]

... that power balance test in advanced scan tools is so freekin' incredible. I was watching FordTechMakuloco do these tests before even touching a darn thing mechanically. Incredible.

Sorry to hijack, sorry for your bud that really sucks.

The funny thing is that's been around for 20 years now. It's an awesome feature.

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