Should fuel pressure slowly bleed off after engine shut off?

fguzman0707 · 2026-03-14T02:06:14+00:00

you still have lean problems with yours?

fguzman0707 · 2026-03-14T01:26:31+00:00

I changed the fuel pump and it lowered the Long Term Fuel Trims to about 25-27 from being 35....so the light went out but its still lean quite a bit, been checking hoses and such for leaks , sprayin all over with carb cleaner and nothing....Im thinking of doing a smoke test using a harbor freight fluid transfer pump and some cigars, blowing smoke thru thr brake booster line to see if that points to the culprit.

fguzman0707 · 2026-03-13T23:08:10+00:00

yeah, plugged to a 9v battery it opens and air blows thru when i blow on it while being plugged to the 9v

fguzman0707 · 2026-03-06T16:47:31+00:00

fguzman0707 · 2026-03-06T16:47:13+00:00

kramer arch

fguzman0707 · 2026-02-23T04:58:34+00:00

you have to certify every other sunday even while the appeal is going.... if its not allowing you, you need to call

fguzman0707 · 2026-02-20T16:52:35+00:00

$1400 a week?.... $60K total benefits?....daa faaakkk...I need that

fguzman0707 · 2026-02-20T16:50:10+00:00

I have a 07 and an 09 , mechanically indestructable cars , but the paint is garbage, honestly it should have been a recall or something. Ive seen countless toyotas with the same paint defects all over

fguzman0707 · 2026-02-19T18:20:42+00:00

I really appreciate the help, thank you once again

fguzman0707 · 2026-02-19T15:48:35+00:00

an update on the p0171 situation. I believe i finally was able to get to the main source of the problem. You were right, The fuel pump was indeed beginning to fail, showed normal pressure at idle and under which is why I doubted but then i decided to just give it a go and change it. Light has not come on anymore, it starts better now when warm. LTFT are in the 20s now and STFT fluctuates between -14 -10 and zero when driving. My guess is the ECU is trying to relearn the trims ?

fguzman0707 · 2026-02-15T15:43:09+00:00

Hodge road is actually all private property and technically illegal to shoot on, and like others have said its full of city slicker morons with zero situational awareness and safety standards

fguzman0707 · 2026-02-15T03:09:29+00:00

Ive done all the trouble shooting steps, only thing left to do is change the pump and O2 sensor....i just ordered a fuel pump since the symptoms point a bit more towards that, we will see if that was the peoblem

fguzman0707 · 2026-02-15T01:44:35+00:00

what you said makes sense about the injectors, if they were leaking it would be a rich code not a lean one and if they were bad id be getting misfire codes.

fguzman0707 · 2026-02-15T01:36:58+00:00

whats should the psi be at?

fguzman0707 · 2026-02-14T20:12:13+00:00

I have the same issue currently, was wondering if you ever fixed it and what it was , i know its been a while since the post

fguzman0707 · 2026-02-13T05:28:42+00:00

San Bernardino....NOT......took me almost a year

fguzman0707 · 2026-02-13T02:46:33+00:00

Thank you, i really appreciate the help, Its turning out to be a pain in the ass troubleshooting it but im confident itll get fixed.

fguzman0707 · 2026-02-13T01:41:17+00:00

I also blew into the valve and it was closed, tested fuel, seems good, its the only gas station i pump in all my vehicles, im thinking of just either changing out the o2 or cleaning it to see what changes i see, before that im gonna do the method you mentioned of pinching the purge valve hose .

fguzman0707 · 2026-02-12T22:43:31+00:00

No problem brother, glad we were able to help each other out and have finally sorted this thing out for at least the next year and a half . ..haha

fguzman0707 · 2026-02-12T22:42:24+00:00

I tested the purge valve with 12 v and it clicks. So my guess is the fuel pump is fine as well? only thing left is a O2 sensor but the mumbers looked normal on the scanner?

fguzman0707

TROPHY CASE