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Showing results for tags 'p0174'.
Found 3 results
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Have a 2003 Silverado LS with 5.3 @ 149K miles. Engine running sluggish and flashes check engine light once you try to accelerate above 50mph. Pulled codes. P0174 and P0300 r codes. Changed plugs, wires, and fuel filter. No change. Plugs on passenger bank all black and sooty (see image). Drivers side showed sm wear but nothing like bank 2. Fuel is 48psi idling and bumps to 53psi when revving. Fuel pressure regulator is not leaking and shows no sign of wetness anywhere in hose connected. Reading all over web about possibilities from fuel pump to upper intake gasket to EGR to MAF. But those are all usually accompanied with P0171 also. Any thoughts??
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Gonna get right to the point by stating the facts that I do know. I have a 2001 Tahoe with a 5.3 Vortec with 165k miles. Check engine light has been coming on the past four winters. It started out a temperatures <10 degrees, and now has gradually gotten worse to <35 degrees. Same codes every time, P0171, P0174, and P0300, Lean bank 1 and 2, and random misfire. Most noticeable is rough idle, the colder it gets, the worse it is. After reaching operating temperature, it idles smooth, with plenty of power and never misses a lick. Last winter fuel pump, filter, and all lines from tank to manifold was replaced.( Due to pump quit working) Also plugs and wires was replaced. After asking around, and doing a little research, I was hoping for an easy fix by replacing the MAF unit, which also contains the IAT sensor. I have to tell ya...it didn't help. Thank you for the add, and any help you can provide.
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2000 GMC Jimmy 4.3 Vortec 4WD ~215,xxx Engine starts, runs/revs in park but will stumble and miss off idle in drive. It wont stumble all the time though, sometimes it will run perfectly fine. Occasionally while driving in overdrive the engine will lose power, throttle does nothing, and drop to idle and begin stumbling and backfiring. After this happens if you let it sit for a few minutes it will start and run fine. Also this loss of power only occurs in overdrive, if I drive around in 3rd it runs fine. Fuel pump was replaced ~3 years ago Fuel filter ~3 months ago IM gaskets ~5 months ago (due to a coolant leak) Radiator ~8 months ago (cracked) Had codes pulled p0101, p0151, p0717, p0174 Anything you guys have would be great! Thanks!
