Not a professional but I had a problem with a 2014 chevy silverado that was pretty close to the same thing. The problem wound up being deteriorated catalytic converter on th right side. It took me a while to figure it out.
Not a professional but I had a problem with a 2014 chevy silverado that was pretty close to the same thing. The problem wound up being deteriorated catalytic converter on th right side.
Random misfires in cylinders 4 and 7 of a 2017 Chevrolet Tahoe can be caused by several issues. Here are some potential causes and steps you can take to diagnose and fix the problem: Ignition System Problems: Spark Plugs: Check the spark plugs for wear, fouling, or improper gaps. Replace them if they are old or damaged. Ignition Coils: Faulty ignition coils can cause misfires. You can swap the coils between cylinders to see if the misfire follows the coil, indicating a bad coil. Ignition Wires: Damaged or worn ignition wires can lead to misfires. Inspect them for any signs of wear or damage and replace them if necessary. Fuel System Issues: Fuel Injectors: Clogged or malfunctioning fuel injectors can cause misfires. Use a fuel injector cleaner or have the injectors professionally cleaned. You can also swap the injectors between cylinders to see if the misfire follows the injector. Fuel Pressure: Low fuel pressure can cause misfires. Check the fuel pressure with a gauge to ensure it is within the manufacturer’s specifications. Air Intake and Vacuum Leaks: Vacuum Leaks: Check for any vacuum leaks around the intake manifold, throttle body, and hoses. Use a smoke test or a carburetor cleaner spray to detect leaks. Air Filter: A dirty air filter can restrict airflow and cause misfires. Inspect and replace the air filter if it is dirty. Engine Mechanical Problems: Compression Issues: Low compression in cylinders 4 and 7 can cause misfires. Perform a compression test to check the compression levels in all cylinders. If the compression is low, it could indicate worn piston rings, damaged valves, or a blown head gasket. Timing Issues: Problems with the timing chain or belt can cause misfires. Check the timing to ensure it is set correctly. Electronic and Sensor Problems: Crankshaft and Camshaft Position Sensors: Faulty sensors can cause misfires. Use an OBD-II scanner to check for sensor-related trouble codes and replace the sensors if necessary. ECM/PCM Issues: The Engine Control Module (ECM) or Powertrain Control Module (PCM) could be malfunctioning. A professional diagnostic tool can help determine if the ECM/PCM is causing the misfire. Exhaust System Issues: Catalytic Converter: A clogged or damaged catalytic converter can cause backpressure, leading to misfires. Inspect the catalytic converter and replace it if necessary. Oxygen Sensors: Faulty oxygen sensors can cause incorrect fuel mixture adjustments, leading to misfires. Use an OBD-II scanner to check for oxygen sensor-related codes and replace the sensors if needed.
I had a 2017 Tahoe. key word is had... I am not a mechanic but could it be possible the spark plug wires be going to the wrong cylinder? i dont know just want to add my 2 pennies which aint worth nothing
I dig this type of video short sweet and to the point I doubt you're lying so I don't need to see the process. I have a 4 by 4 15 v6 and I'm headed out to do this right now hopefully it works
One of the ultra critical things not dicussed or that I may have missed in here is this video is for a 2wd only! You CANNOT get the starter out the bottom of the car with a 4wd. The drivelive and yoke are in the way.
Great video! Pretty thorough, sure you had to put the camera down. But you have all of the info needed. Super helpful. Thank you. Will be attempting this in the morning after parts store opens up. Unfortunately it’ll be 0-2 degrees when I’m working on it. This is what separates the boys from men tho:) have to be in cali for a delivery. So it’s do the repair or miss out on a great pay day.
Saying this for ANYBODY that may find themselves here in the future... Go through the wheel well and remove the manifold heat shield it fucking comes right out with minimal shuffling around.
I just used this technique and it worked perfectly. It saved me a lot of time and frustration! I did not have that size giant zip tie, but used two thinner ones and they were strong enough. Thank you Oscar!
I think this is what I need. I have a cyl 3 misfire. Changed the plugs between cyls. New ac delco cap, rotor, wires, coil, new fuel filter, cleaned maf, new denso o2 sensors. Still no change. Now I just need the correct spider for a 02 3500 5.7
even easier if you leave the bell housing bolt and the trans cooler lines in place and remove the exhaust manifold heat sheald and bring it up through the fender, way more room it basically jumps out
My thoughts exactly. With a stethoscope, it sounds more pronounced around the bellhousing. Lame there is no access ports. I will remove the starter and look for marks
@@greasemonkeygaragesd I am a Ford technician. We have a lot of issues with flexplates in some of our escapes/edges. There is a TSB for that. It wouldn't apply to yours, I only bring it up because that's exactly what it sounds like. The ones we repair crack.
@@greasemonkeygaragesd I'm surprised that it doesn't have a black rubber access plug. The bottom 2 bolts of your bell housing may hold an access sheild
I've watched this twice now and I'm almost to the point where I think I've got this! Thanks again for the great tutorial. Wished I could see you put it all back together again though but I understand it would be a long video.
Thanks for an excellent video. Looks daunting. I'm not a mechanic so it looks particularly difficult even though I do almost all repairs myself. How much did the parts cost?
