I have not run a smoke test but I think replacing the rubber and plastic parts can't be a bad thing in this old truck.
Can anyone give me some advice on making sure there's no vacuum leaks? I definitely don't know this well so your expertise is really valuable!
From what I found researching...
These are all so helpful thank you! The computer is showing lean, and I have learned from y'all that lean can still have an exhaust smell. I always thought that exhaust smell that smells like the local drag strip was running rich. I have ordered some parts and I haven't put anything on...
Thank you for that! The details are all very helpful as I'm working through this. I really need to figure out the fuel pressure situation so I can give a realistic answer on that. My answer currently is "I have no idea" so I need to find a way to read the pressure. Hopefully one that doesn't...
Wow that's GORGEOUS! I'm not trying to do anything performance related and I still want that just because it looks amazing!! How much would you say the parts cost to add in the pressure sensor and regulator?
I will check on that, just the coolant temp I'm looking for? And thank you for NGK suggestion....now I'm debating if I want to do a 3 write conversion!
Thank you all for the help. I have read the fuel filters are notorious for getting clogged so that's a piece I want to do also. Is there a fuel pressure sensor or meter that you used and would recommend @Sabinoerc
This is all great information and a huge help to someone that's new to this truck and engine. It seems like the 1 O2 sensor is probably the case in this truck, but I'm going to try to crawl my big butt under there and make sure I don't see anything else!
This was just me driving. It normally. I was finally able to get the scanner hooked up to the computer. So I just took it on a ten or fifteen minute ride.
I just recently bought the truck. So I don't know exactly how old the O2 sensor is. But I would imagine it is probably a little bit older.I...
I thought I saw that it was lean in the output also! I'm glad I'm not going crazy. It absolutely doesn't smell lean...I wonder if the O2 sensor is shot.
I don't believe I have a device that can write to the chip, unless it's extremely basic and done through the ALDL like I pulled TunerPro but...
Thank you so much in advance y'all! So I was able to get TunerPro RT working and I went for a 10 or 15 minute drive in the old gal. I did not have any codes when I checked with the paperclip method.
Some of the "issues" that concern me:
- Pretty strong smell of "running rich". I hope this...
That was part of the reason I came here to ask, the 4.8L engine definitely seemed fishy. I searched that link previously (and just went through again to make sure) and they don't have the 1990 manual unfortunately. I would much prefer those! Thank you for linking that I think it's great...
Hi everyone, I just want to double check and verify what I'm reading in the Chilton manual for this truck. I have a 1990 GMC SIERRA 1500 SLE, 4WD, 5.7L V8 TBI. I don't know the transmission that is in it (I hope I'm giving enough information here).
The manual says : "The oxygen sensor is a...