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iboughtatahoe23
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I wonder if that y it running lean
So I finally changed my plugs and wires.
- Thread starter iboughtatahoe23
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Gearz
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Dirty MAF ( Mas Air Flow ) dirty injectors pre O2 sensors fuel pressure etc….. You would need a scan tool or just a parts cannon. LOL
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iboughtatahoe23
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Used a scan tool. I got one. No codes. Runs fine. Cleaned the sensor, cleaned the throttle body. Not sure what else. I use e85. I doubt injectors but maybe?
I may have missed it, but what indicates that it's running lean?
Is your engine a flex fuel engine (what's the 8th digit of your VIN), and what kind of short- and long-term fuel trims does the scanner show?
Is your engine a flex fuel engine (what's the 8th digit of your VIN), and what kind of short- and long-term fuel trims does the scanner show?
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iboughtatahoe23
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It is flex fuel. Not sure on fuel trims. I’ll bust the scanner out tomorrow and look and update you guys.
I thought it was running lean due to these three things I saw on on the plugs:
Some has oil on the threads, some had brick red ash on the tips. And some had white ash on the tips.
8th digit is a 0
Charlie207
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Also check both the intake manifold gaskets (the seals get hard and will let unmetered air leak into the engine) and the tightness of the intake manifold bolts.
You could hear the air sucking/whistling into the cylinder heads at idle until I torqued the bolts (in sequence) back down. Now it's a semi-regular check, even after new intake manifold gaskets.
