On my 91 the fuel pressure seems to completely bleed off if it’s sitting overnight and won’t start again unless I give it a shot of starting fluid. 1 year old precision fuel pump. You guys think it could be the fuel pressure regulator?
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Certainly possible. Have you checked the fuel pressure with a gauge? Would be a good place to start and take it from there. Even though you have a recent fuel pump, they do go bad so that is still a possibility.What I Own: 1993 Mercury Grand Marquis GS
What I Help Maintain: 1996 CV / 1988 CV / 1988 Tempo -
they do not hold indefinitely. I've never had one that held pressure more than a couple of hours. The real question is how fast does it prime up? If it comes up to basically normal pressure during the 2 second pump prime when you first turn the key to 'on', thats not why it doesn't start.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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I have 35 lbs at the test port but it still won’t fire without starting fluid, it purrs like a kitten once you get it startedOriginally posted by friskyfrankie View Post
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In doing my diag I found that it idles at 30lbs with the regulator connected to vacuum and it climbs to 40lbs when I unhook the vacuum and i found lean codes for both banksComment
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Thats normal pressure
is your TPS good? If not it won't get fuel when cranking86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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Update: the IAC was causing my initial hard to start issue but I could smell gas from the regulator diaphragm so I went ahead and pulled the plenum and did valve cover gaskets at the same timeComment
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