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Old 11-11-2019, 17:57   #1
Corsica13
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New Evo IX Owner - Compression Test Results Not Good!!!

Hello all,

I've recently purchased a new Evo IX MR FQ-360 which I'm super happy with but having just taking it to 'Auto Torque' up in Oxford, they've carried out an exhaustive health check, of which a compression test is included. The results are as follows:

Piston 1: 10.5 Bar / 152 PSi
Piston 2: 10.5 Bar / 152 PSi
Piston 3: 8.5 Bar / 123 PSi
Piston 4: 10.5 Bar / 152 PSi

They have confirmed that by using a Bore Camera, they can see some scoring on the inside of the Bore Housing on Piston 3 which has an alarmingly low pressure.

The car has done 22k miles, they have also confirmed that the rest of the car is in very good condition but it's likely it's been pushed hard in it's short life.

It's worth noting that the car has been re-mapped with 3 maps:

1.2 Bar - Low Boost
1.5 Bar - Medium Boost
1.7 Bar - High Boost

I believe the re-mapping was done at around 10k miles.

I was wondering what anyone else's experience is with Evo IX's and their engines running low compression?

From research and speaking with Auto Torque, they suggested the compression should be reading around 12.5 Bar / 181 PSI.

Any feedback or advice would be greatly appreciated.

Thanks all!
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Old 11-11-2019, 18:36   #2
Mark Shead
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Forget compression test as it doesn’t tell you where the air is going. Get a leak down test done as this is the way you correctly diagnose if there is a fault.

Mark
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Old 11-11-2019, 19:21   #3
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Where abouts are you located?
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Old 12-11-2019, 00:15   #4
Corsica13
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Originally Posted by Mark Shead View Post
Forget compression test as it doesn’t tell you where the air is going. Get a leak down test done as this is the way you correctly diagnose if there is a fault.

Mark
Thank you for your response, I will call AT tomorrow and ask them to carry out that test, I did also read what you've suggested.

What are your thoughts on the initial readings though?

Thanks.
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Old 12-11-2019, 00:16   #5
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Where abouts are you located?
In between Reading & Basingstoke - Hampshire / Berkshire border.
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Old 12-11-2019, 10:06   #6
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Hi mate not far from me and not far from myself and gavalar on hear we both have the same model as yourself sorry to hear about your dilemma listen what mark has to say mans a genius when it comes down to mechanics 👍
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Old 12-11-2019, 10:31   #7
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https://www.madevelopments.com

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Old 12-11-2019, 12:03   #8
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Was the compression test performed with a cold or warm/hot engine. If all the pressures had been around 150psi I would personally have been quite happy.

But as already very sensibly suggested, get a leakdown test done. Incidentally, I'm very surprised that Auto Torque haven't already suggested it to you because until you pinpoint the cause of the loss of compression (piston rings, inlet or exhaust valves etc) you really don't know what to start pulling apart.
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Old 12-11-2019, 15:50   #9
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In between Reading & Basingstoke - Hampshire / Berkshire border.
Heard good things about MA Developments.
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Old 13-11-2019, 17:25   #10
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Hi mate not far from me and not far from myself and gavalar on hear we both have the same model as yourself sorry to hear about your dilemma listen what mark has to say mans a genius when it comes down to mechanics 👍
Thank you very much buddy, I have requested AT to carry out the Leak Down Test, they are just doing a bit of other work. Once that's done, I will await the results and see what they have to say.

They're going to talk about what my options are moving forwards! (Anxious)

If you guys are near by, should meet at some point, would be good to get together with some other Evo owners! Once the car is done anyway!

Thanks again.
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Old 13-11-2019, 17:26   #11
Corsica13
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Thanks for the suggestion, I checked them out, they look decent. Have you had work done with them?

Cheers,
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Old 13-11-2019, 17:34   #12
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Was the compression test performed with a cold or warm/hot engine. If all the pressures had been around 150psi I would personally have been quite happy.

But as already very sensibly suggested, get a leakdown test done. Incidentally, I'm very surprised that Auto Torque haven't already suggested it to you because until you pinpoint the cause of the loss of compression (piston rings, inlet or exhaust valves etc) you really don't know what to start pulling apart.
Hi Phil,

Thank you for your input, yes after you mentioned it, I did ask myself the same question. I ran it past them but wanting to concentrate on the initial work that it was originally booked in for, they said we would re-visit this area after.

We have agreed that a Leak Down Test will now be carried out and await the result, likely tomorrow this will happen so I'll update the thread then.

Thanks again
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Old 13-11-2019, 17:36   #13
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If anybody else has had similar symptoms, it would be good to know what approach they took, what the results were when they diagnosed it and what they did to fix it plus the cost, would be great to have this kind of information.

Thanks all.
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Old 13-11-2019, 19:39   #14
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Out of curiosity did you buy the Evo from a garage or private sale. If it was a garage you should be covered for any faults?
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Old 13-11-2019, 22:28   #15
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Originally Posted by Corsica13 View Post
If anybody else has had similar symptoms, it would be good to know what approach they took, what the results were when they diagnosed it and what they did to fix it plus the cost, would be great to have this kind of information.

Thanks all.
Let’s get the results of the leakdown test first then we’ll know where to go from there👍
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