Revs oscillating-- feeling nauseous, could use help :(
#1
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Revs oscillating-- feeling nauseous, could use help :(
I have a hydra 2.5 and I recently upgraded my fuel pump a few months ago . I re-autotuned properly (or so I thought) but now 6 weeks later, somewhat coincidentally with the warmer weather I've been getting oscillations in my revs.
When I'm in boost or anywhere above -10 vacuum there's no oscillations. I get oscillations throughout the rev range whenever I'm betweeen -25 and -10. It's about 2 oscillations a second and I can hear it, feel it, and watch my boost gauge needle bouncing around.
Anyone have any ideas of what might be causing this?
When I'm in boost or anywhere above -10 vacuum there's no oscillations. I get oscillations throughout the rev range whenever I'm betweeen -25 and -10. It's about 2 oscillations a second and I can hear it, feel it, and watch my boost gauge needle bouncing around.
Anyone have any ideas of what might be causing this?
#7
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OK it was caused by being lean. I started over with a fresh base map from Jeremy and it was ok. Then I autotuned and it leaned it way out and now it does it again. I guess my wideband sensor is dying.
#9
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It could be the cold start enrichment? Maybe it's not enriching enough?
BTW it may be worth contacting Jeremy and asking him to update your map. I sent him mine and there's quite a few changes on the new version. I think he has VVT programmed in properly too on the new map.
BTW it may be worth contacting Jeremy and asking him to update your map. I sent him mine and there's quite a few changes on the new version. I think he has VVT programmed in properly too on the new map.
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To update this thread for anyone searching for information--
This was caused by me running lean. My wideband had slowly died. I loaded up the base map which is far richer than my tune and all was well.
I think Long Term Trim might take input from the wideband so if your wideband dies (the hydra wideband dies slowly and reads increasingly inaccurately) it might screw up your table over time.
This was caused by me running lean. My wideband had slowly died. I loaded up the base map which is far richer than my tune and all was well.
I think Long Term Trim might take input from the wideband so if your wideband dies (the hydra wideband dies slowly and reads increasingly inaccurately) it might screw up your table over time.
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