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Intermittent Hesitation, P0191 & Others

Posted: Fri Jan 03, 2020 6:42 pm
by maphreal
Hello, been working on my wife's freestyle and have hit a wall. Sometimes, typically 2 days after I'm sure fixed the damn thing, it hesitated, wants to stall out or is difficult starting.

I started with basic maintenance items and worked my way up. I've put in new spark plugs, air filter, fuel filter, MAF sensor, fuel pump relay, fuel rail pressure sensor, fuel pump, and fuel pump driver module.

The codes that routinely come up are p0191 and p0452. Torque app shows fuel pressure around 8-14 when it acts up. Last time I worked on it, it also spat out p0107, p0172 and p0532. Cleared those and started again, and they never came back.

I'm starting to think I've got a funky electrical problem causing my sensors to spaz out. I've checked to make sure the wiring harness isn't rubbing against the AC line, it's good there.

I'm out of ideas and am about to bite the bullet and take it to the mechanic. If anyone has any suggestions, they would be much appreciated!