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Old 08-12-2022, 02:45 PM   #6
KevinVarnes has a spectacular aura aboutKevinVarnes has a spectacular aura about
Join Date: Oct 2006
Location: Grand Rapids, MI
Posts: 274

2000 SL1
1995 SW2
Default Re: 98 SC2 P171-Fuel trim System Lean, help fix Please!

billr hinted at it, but "and it seems to crank a bit more than it should before starting" stood out to me. The fuel pressure regulator for your car is in your fuel filter. I would be willing to bet there may be an issue there. Unfortunately you cannot get any of the proven aftermarket fuel filters any more. The cheaper ones had issues with properly controlling fuel pressure. Your best bet right now is a Hastings/Baldwin filter.

My wife's old '00 SL1 always cranked a little longer than it should have on startup after changing the fuel filter. After a while I finally installed a Wix and it started up immediately after that.

I would check fuel pressure and make sure it is in spec.
'85 Ford LTD Squire
'89 Cougar XR-7 5 Speed
'95 T-Bird SC 5 Speed
'97 T-Bird LX
'91 Crown Vic P72 351W
'98 Saturn SW2 5 Speed (wife's car)
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