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I was doing a WOT scan run and the fuel pump voltage dropped off and the system went lean. The scanner picked up nearly 12 KR for a second before I stopped. The car has a 3.5" pulley, colder plugs, P&P M90, u-bend delete, FWI, 180 thermostat and an overkill PCM. I was running it on 91/100 octane mixed half and half. It still sounds good, should I be worried about serious damage?
 

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dude, get the fuel pump rewire kit, very cheap insurance for the motor,,,,oh ans sell me the 3.5 pulley immediately:icon_eek: when did the fuel press. drop off? when tuned the first time, mine went lean at 5100, do a rewire kit , simple just like wiring a speaker..
 

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The only way to know if anything bad happened is to keep an eye on it.

Most likely you got lucky and nothing happened. Many people have gone lean at least once w/o issues.
 
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