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Forced Induction Turbo, Supercharger, Methanol, Nitrous |
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11-29-2015, 03:28 PM | #15 |
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subbed.
Having the same idle hunt from 600-1400rpm ONLY while on e85. Smooth idle with 93. Having stumbling/hesitation with both 93 and e85. Interested in throwing some check valves in my dual catch can lines (PCV plumbed to manifold and Crank Vent plumbed in to intake track) to see if that makes a difference. X2 on what fuel pressure regulator to upgrade to. When running an EBCS using the EVAP harness pigtail, what does the EVAP solenoid default to? Closed? EDIT: It DOES still hunt at idle on 93, just not as exaggerated. Last edited by xkalelx; 12-01-2015 at 06:50 AM. |
11-30-2015, 12:39 PM | #16 | |
Drifter-Wannabe
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11-30-2015, 03:10 PM | #17 |
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I would start by taking off the crawford AOS, and then try to get it working smoothly. Having a PCV catch can, or whatever, can do funky things, it did for me at least. Some cars don't like them so much. Having a more simple setup can be easier to get it running basic.
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11-30-2015, 03:31 PM | #18 |
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Replace the Crawford AOS,
Don't need to change the fuel pressure regulator, there's lots of people (thousands) running a turbo kit with stock regulator and no issues. Since the car has been leak tested AND at WOT the car behaves fine with no leaning out issues, I'm pointing towards the tune BUT, it seems weird two tuners taking a crack at it and not being able to resolve it. There is a way to test if it's the DI, you can turn the injectors off via the tune and test if the car behavior improves.
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12-01-2015, 12:17 PM | #19 | |
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Another symptom I experience sometimes: I'll be in first, around 1k RPM or so, lightly hit the throttle, and nothing will happen for about a second, and then the car jerks to life and starts accelerating. That's a fun one. Also this morning my car really didn't want to start. Turned and turned for about 4 seconds before I tried again with the gas pedal to the floor. Then it started up. Leaky DI seal == gas chilling in cylinders on cold start maybe? |
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12-01-2015, 12:38 PM | #20 | |
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12-01-2015, 12:45 PM | #21 |
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Yeah I don't have that, and I suspect the other people in this thread don't either.
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12-01-2015, 02:41 PM | #22 |
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There's a lot that goes into the tuning side that can play a role here. Some cars/setups are much worse than others with the idle fluctuations, but often you can hone it in with precision if you adjust things correctly. Increasing the MAF size/location will have a very significant impact on the values the ECU expects to see at idle. If the tune adjusts the scaling to such a degree that that those are outside of the expected range, you will see severe fluctuations and stalling. You can also get the same exact issue if you overcorrect.
AOS, improperly installed catch cans, loose hoses and all those mechanical things will cause issues, no doubt about that. But if you've exhausted those then that would be the next place to look. |
The Following User Says Thank You to Xero-Limit For This Useful Post: | xkalelx (12-01-2015) |
12-01-2015, 06:34 PM | #23 |
We've tune numerous FB kits at the shop with good results. We've seen various issues but have always been able to correct them and tune them completely. PM me and I can go over some things to try in detail if you'd like.
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12-05-2015, 10:37 PM | #24 |
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Thanks for all the replies guys, I have been very busy the past few days, but I am going to rip out the AOS tomorrow after work to see if it helps any. It didn't show any signs of leaking though when checking the system. I am also looking into other shops on Long Island that I can bring the car to for one last hope of finding out what the issue is. Moto East, you guys are almost 4 hours from me as you are located in PA and I'm in NY so I don't know if that is possible for me to drive the car as is that far of a distance.
Here are some logs I promised - the first one is with the Delicious Tuning 'hybrid' map & was a terrible drive, and the last two are with Full Blown's basemap installed. The "highway cruising" one probably shows it the best, although it gets much worse. FBM Highway Cruising Hesitation FBM 1st-2nd-3rd Driving DT Hybrid 2nd-3rd Gear Driving
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Last edited by Jhood; 12-06-2015 at 12:21 PM. |
12-06-2015, 04:50 AM | #25 | |
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It's pretty clear from that log you have an issue with the tune. |
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12-06-2015, 10:32 AM | #26 |
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Um.... is it me or does the exhaust valves look like they are opening super early on the DT Hybrid?
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12-06-2015, 10:33 AM | #27 |
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Um.... is it me or does the exhaust valves look like they are opening super early on the DT Hybrid?
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12-06-2015, 12:20 PM | #28 |
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Yea I'm not sure what the issue is with their tune and my car, but I actually became scared to drive it after they revised it every time due to how erratic the driving / stalling / hesitations & noises became.
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