P1171 & p1174
Your additive and premium fuel are definitely not required, zero detectable change.
I was looking around the vacuum lines on the passenger side of the truck and I noticed that the break servo vacuum line (the hose with the red clip) was easy to pull it out and was a bit loose. I’ll look around the maf sensor again. Also one of the clips that holds in the the MAF assembly snapped off, it’s right before the sensor but could that be part of the issue?
I think you found your problem, if that hose does not fit snug that could be the cause of the codes. You can seal it with silicone rtv, not exactly oem design but gets the job done. The OEM design is designed to be a quick release. It can be replaced, you have to remove the intake hose, open the throttle, and tap it out from the inside with a long tool.
Once the vac pipe is removed from the intake, you can easily pull out the red ring to see if it appears damaged. I have a couple extra red rings I have salvaged from boneyard trucks. I'm happy to drop one in the mail for you if you like. No need to remove the entire fitting from the manifold unless you can see other damage to it.
If you go ahead with sealing the fitting with silicone I would first remove the red ring. Remember, there is no force trying to push the vac pipe out; it's being sucked toward the intake by engine vacuum. You're just trying to prevent extra, unmetered air from entering there. And you can go easy on the RTV. To quote an ancient TV commercial for Brylcreem, "A little dab'll do ya!"
Last edited by mln01; Dec 15, 2023 at 09:32 PM.
Sorry for the late reply y’all. I’ve been driving around after I sealed it up and it’s been driving without issue. It’s idling smoother and driving smoother. I haven’t driven enough for the readiness monitors to be finished but the engine seems happy.
Hello, After driving about another 50 miles no codes but Pending codes for P1171 and P1174 again, Ive noticed that the SAI doesnt come on anymore at Cold starts, I went to start it after sitting for about 4 days and it didnt start cause the battery was low, Could that be cause the battery is getting older and weak?
We had a discussion about batteries going flat quickly a couple of years ago (when mine went flat after a 5 day canoe trip). That is the only time it happened to me. Normally my battery is fine for a couple of weeks. The one theory someone came up with was that it the vehicle is locked with the key, instead of the fob, a computer (BCU?) doesn’t fully go to sleep. I’m pretty sure that the time mine went flat I locked it with the key, naively thinking that the opposite might be the case.
We had a discussion about batteries going flat quickly a couple of years ago (when mine went flat after a 5 day canoe trip). That is the only time it happened to me. Normally my battery is fine for a couple of weeks. The one theory someone came up with was that it the vehicle is locked with the key, instead of the fob, a computer (BCU?) doesn’t fully go to sleep. I’m pretty sure that the time mine went flat I locked it with the key, naively thinking that the opposite might be the case.
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