Got my new turbo tune, and now my car sounds like a Subaru (w/ video)
Well, well, well.... I'm back with another problem. Got my latest tune from MM and installed it and car was running great. I was finally able to go WOT and reach redline. Well I was on the autobahn in boost and then the car just seemed to lose power... The exhaust note changed (as if I was missing an ignition cycle) and the car could not accelerate and could just barely keep a steady speed. I came to a stop and the engine died right away, and would not restart.
Towed it to the shop... checked for spark coming out the wires, changed the spark plugs, checked for boost leaks, did the deflood procedures, cleaned the MAF, and engine still will not start. Finally decided to tow strap the car and get it up to speed then slip the clutch, and was finally able to get the engine turning under its own power but I have to blip the throttle to keep it alive and it will not idle on it's own. Drove the car around the block a few times and the car is extremely weak and just doesnt have any power. It almost feels like (and sounds like) the engine is missing a cycle. I have spark coming out all 4 and fuel... what else do I need to look for ? I was also able to start my Accessport and get a datalog while the car was running, its not a very steady log since I was blipping the throttle most of the time. Datalog: datalog1.csv Below is a video of how the car is running now after we tow strapped it to get it started. |
Originally Posted by Rotary_Redliner
(Post 4408394)
Towed it to the shop... checked for spark coming out the wires, changed the spark plugs, checked for boost leaks, did the deflood procedures, cleaned the MAF, and engine still will not start. Finally decided to tow strap the car and get it up to speed then slip the clutch, and was finally able to get the engine turning under its own power but I have to blip the throttle to keep it alive and it will not idle on it's own. Drove the car around the block a few times and the car is extremely weak and just doesnt have any power. Sounds like its running on one rotor... check engine compression. :fingersx: . |
What was it doing before the latest tune? Are your coils good?
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Bad compression on a Renesis means blown apex... doesnt blown apex mean pieces in the engine ? Because when I was doing the deflood with the spark plugs out there was none of that business going on..
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Everything was good up to the point in which the car lost power. I checked each plug wire for spark.
Originally Posted by pdxhak
(Post 4408418)
What was it doing before the latest tune? Are your coils good?
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Originally Posted by Rotary_Redliner
(Post 4408426)
Bad compression on a Renesis means blown apex... doesnt blown apex mean pieces in the engine ? Because when I was doing the deflood with the spark plugs out there was none of that business going on..
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Forgot to mention I got a few engine codes:
P0336: Crankshaft Position Sensor 'A' Circuit Range/Performance EPS U1900 U2023 RKE U1900 The P0336 code has shown up in the past... I've resetted the code and it would not pop back up for a long time. The rest of the codes are just communication errors I am assuming from during research (not a problem). |
Originally Posted by Charles R. Hill
(Post 4408421)
Then start searching for a Renesis builder in Europe.
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Sound like a blown seal to me sorry
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you were finally able to go WOT and blow the engine ...
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Originally Posted by TeamRX8
(Post 4412408)
you were finally able to go WOT and blow the engine ...
Now that's a bad deal... lol But in all seriousness, it sounds like it's blown if all coils and cables have been checked. |
Blown apex seal for sure.
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That's what mine sounded when I lost compression with my original factory engine last June. The engine bogged in the freeway and the RPM couldn't maintain idle or even rev more than 4,000 RPM. It stalled but I coasted and popped the clutch in third gear as I exited and just kept my foot on the throttle at 1,500 RPM and drove it in the city streets like that for about three miles home.
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Originally Posted by TeamRX8
(Post 4412408)
you were finally able to go WOT and blow the engine ...
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Stronger seals? Did your buddy tell you about those. Did you get this engine compression tested prior to going turbo? Get it rebuilt by someone with experience rebuilding a renesis. What works on a previous version of the 13b does not necessarily work on a Renesis.
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My engine had 26k on it when it blew... I have no doubt that my engine was strong before I went turbo. Before the engine blew on the autobahn, I had noticed on my boost gauge that I was hitting 13-15 psi so there may be a wastegate adjustment issue that I will need to fix. Stronger seals is a preventative measure... I've researched and I know that with a proper tune the stock seals should be all that you need. If you search "Savannah" on the forum you will see some of the work done by Javier20b. I am confident that I am in good hands.
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Originally Posted by Rotary_Redliner
(Post 4416888)
My engine had 26k on it when it blew... I have no doubt that my engine was strong before I went turbo. Before the engine blew on the autobahn, I had noticed on my boost gauge that I was hitting 13-15 psi
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Yeah mileage has little to do with it, my first engine died at 22,000 miles. IIRC your car sat for a couple of years right? Either way that is way too much boost for a stock engine, especially if it was a reman.
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you were confident to hammer it WOT too, just saying ...
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Originally Posted by TeamRX8
(Post 4418787)
you were confident to hammer it WOT too, just saying ...
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Does he have experience tuning with ATR and a Cobb? I haven't seen anything from him indicating he does. Good luck.
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He's tuned many rotaries but he usually uses Haltechs or other standalones. I've downloaded the ATR, so I'm gonna let him take a look at it and see if he can work with it. He may not have the "rep" that you TX guys have on the forum, but I think I'm in good hands ;).
Thread w/ some of his work--> https://www.rx8club.com/se-rx-8-foru...thread-233442/ |
We have a rep but I'm not sure if it's a good one, :lol:
Tuning an RX-7 on an old EK6 Haltech almost has nothing to do with tuning a turbo renny using a Cobb and ATR. Which is why most RX-7 tuners don't tune RX-8's. Having someone learn on your car is a gamble, especially doing so on a fresh engine. I would leave the tuning to MM if you already paid for his services. |
Sounds good ek6 is super old. That computer is a relic but a good one.
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3 rx8 motors build on my belt.
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