What could cause this? idle rich then lean
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What could cause this? idle rich then lean
I can't figure this out. My car has no vacuum leaks that I can find. The rpm raises slightly and causes the car to be rich then the rpm comes back down causing the afr to go lean. I have replaced the front 02 sensor and the aem wideband sensor. Nothing has made any difference. The car is on speed density. I just ordered a new iacv and will try that this weekend to see if it helps. Any ideas would be great, Thanks
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