Fuel Fuel pressure problems

Rallystang

New Member
Feb 6, 2020
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I haven't found much of anything very helpful so hopefully someone here can shed some wisdom. I have a 1999 3.8 manual. Fuel pump was recently replaced along with the filter. I got the car from my nephew who had a shop do the pump and they left the return like off, put it back on and the problem got a little better. Basically whenever I start it cold she cranks forever and finally will start. Put a gauge on the rail today, with key on I get 0 psi after she starts I'll get about 31 but as soon as key is off it drops immediately back to 0. When the car is on it doesn't lose pressure, only when it's off. The car has a funky idle but I think that has to do with the exhaust leak on the y pipe. Any info is appreciated greatly. If any more info is needed let me know.
 
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wmburns

SN Certified Technician
Aug 14, 2009
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but as soon as key is off it drops immediately back to 0
Did you replace the entire fuel pump basket or just the pump itself?

IMO you should think about the problem being a bad fuel pump check valve in the fuel pump basket.
 
Last edited:

Rallystang

New Member
Feb 6, 2020
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0
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Ohio
That had to be the best put answer I've heard for this just got the entire basket ordered guess we shall see what happens later today. THANKS
 
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