About a month ago, I replaced my LIM gaskets (with aluminum ones), new UIM (Dorman) new gaskets, pcv, etc. (Thanks for all your help on my doing this) After this, my car ran really strong for the first couple of weeks, and then I noticed hesitation when pulling hills. On the flat, it ran well. At the suggestion of some others, I replaced my plugs and wires (both AC Delco). This made no difference. Others said maybe it was the MAF and I should unplug it and see if it ran any better. When I tried this, my car ran much better, and in fact, I drove it for a couple of days this way. So, I just purchased a brand new MAF and after installing it, took it out for a drive. Still runs like crap. Just tonight, I tried unplugging my O2 sensor on the manifold to see if there was any difference. It seems to run better. (Does it run open loop this way???) Any harm to my engine???
I also tried spraying all the possible vacuum leak areas (manifold, hoses, etc.) with carb cleaner but there was no change in the idle speed. Idles great, smooth and if I goose the throttle, it revs up fine with no hesitation.
Thru all this, I have had no codes, other than when I had the MAF unplugged. I have a code reader but do not have a scanner.
I know I should probably find someone to scan it, but I don't know anyone in my area to do this.
Sorry if this is long, but I needed to explain what I have done.
Anyone have any further ideas on what I can try.
I really appreciate any help you can give me.
