1996 FZJ80, 1FZ-FE. No engine upgrades whatsoever, completely OEM from front to back inside and out except for double din radio and 33” tires, problem was before any changes to truck where made. Truck accelerated and brakes perfectly. I’ve researched this to death, have commented on a few dead threads in hope of resurrecting them to solve the issue and have had no solutions.
After cold starting (and by cold starting I mean starting truck cold, ambient temp doesn’t matter as this has persisted regardless of outside temp) and continueong to drive, my truck makes the sound posted in the video. I will say the video is maybe 50% as loud as normal as I had already driven the truck a few miles before I thought to video. After driving maybe 2-3 minutes the truck almost never/rarely makes the noise again. I have minor feedback in the accelerator pedal that kinda feels like a reverberation more than a full on vibration, like a pulley bearing is out of balance or on the way out, but not a vibration when you can tell something has completely s*** the pot. Steering, braking, warming the truck up before driving; nothing seems to solve the issue.
Truck was recently base lined which solved nothing. All fluids, wheel bearings/seals front and rear, new brake pads and rotors, MAF cleaned, new battery. I think my next step is a new serpentine belt, and keep my old one for a spare just to see if that helps or fixes the issue somehow. I’d prefer to not start throwing parts at the truck in hope of blindly fixing an unknown issue, but I have a feeling it’s a vacuum line that is somehow pulling/not pulling air correctly upon the first few minutes of driving, I do notice in the summer when it’s much hotter my gas tank is pressurized, any vacuum lines/valves between the gas tank and charcoal canister correlated with the vacuum setup? Any ideas from anyone would be a great help
After cold starting (and by cold starting I mean starting truck cold, ambient temp doesn’t matter as this has persisted regardless of outside temp) and continueong to drive, my truck makes the sound posted in the video. I will say the video is maybe 50% as loud as normal as I had already driven the truck a few miles before I thought to video. After driving maybe 2-3 minutes the truck almost never/rarely makes the noise again. I have minor feedback in the accelerator pedal that kinda feels like a reverberation more than a full on vibration, like a pulley bearing is out of balance or on the way out, but not a vibration when you can tell something has completely s*** the pot. Steering, braking, warming the truck up before driving; nothing seems to solve the issue.
Truck was recently base lined which solved nothing. All fluids, wheel bearings/seals front and rear, new brake pads and rotors, MAF cleaned, new battery. I think my next step is a new serpentine belt, and keep my old one for a spare just to see if that helps or fixes the issue somehow. I’d prefer to not start throwing parts at the truck in hope of blindly fixing an unknown issue, but I have a feeling it’s a vacuum line that is somehow pulling/not pulling air correctly upon the first few minutes of driving, I do notice in the summer when it’s much hotter my gas tank is pressurized, any vacuum lines/valves between the gas tank and charcoal canister correlated with the vacuum setup? Any ideas from anyone would be a great help
