rough idle

Hi to all , I am experiencing an issue with engine performance resulting in poor emissions - high CO2. I do not get an DTCs nor MIL is illuminated. I checked data via Techstream and also made graphs of O2 sensors as I was suspecting them to be faulty. I have attached graphs that I measured...

Forgive the long story, but it might help isolate the issue. My family and i went camping a few weeks ago and on the way home the 1997 Land Cruiser 80 series (US 1FZ-fE) started running rough and the check engine light was flashing. I pulled over and pulled the spark plugs to see if I could...

Sometimes I feel the idling is slightly rough than before, any advice? Truck is up to date with all the belts and fluid replacements and drives fine, just when slowing down to a stop, nothing crazy and not all the time. Has anyone tried BG fuel treatments? Going on a road trip soon, just...

Hey y’all, hope everyone is good on this fine Oct day. So I have a misfire that has me stumped, I’ve chewed through every misfire post mostly on here and even some others with vehicles that share my engine (2uz in a 2000 lx470). I’ve got a rough idle, regular throwing of a p0304. Weirdly it...

My fzj80 isn't running smoothly, slight misfire, ticking from the front/top of the engine. No CEL (sadly) and it runs okay. When the engine is cold, and I first start it up it runs absolutely amazing, no ticking, not misfire, no shaking. Once it warms up and starts reading the sensors it runs...

Got a 94LC inline 6 with 335k on her. Love the truck. Unfortunately it has a once in awhile, I ate up all you coolant occurrence. Happened 2 years ago and caught it just fine. This time after about 7-10 miles down the road, she got pretty hot. Noticed it, pulled over and turned it off. I let her...

Quick backstory. Bought this cruiser just under a year ago. Overall very clean but I have been slowly baselining things. About a month ago I replaced PCV, all vacuum hoses and cleaned throttle body and MAF sensor. Replaced fuel filter, checked torque on spark plugs, recently replaced 2 coils...

Having some issues with my 2000 LX with 310k miles on it. It’s got a rough idle and the motor bogs when pressing the accelerator. No codes. This all started when I was initially throwing codes for cylinder 3 misfire, bank 1 too lean, and random multiple misfires. I decided to replace all coils...

Mea culpa. I changed a lot of stuff at once and am the root of my own problem. But, I don't know what I did to cause it... Before I forget - it is a '94 1FZ-FE with 297k miles. My idle is low and lumpy and i don't know what to troubleshoot. I just got this rig in late spring, I changed the...

Searched and searched without any answers. Here I have my 94 cruiser. Once warmed up the engine will run nice and smooth, but about every thirty seconds or so it gets really rough like it isn’t firing on all cylinders. Idles rough for approximately 10 seconds and then goes back to smooth. Does...

Hi i have a 1994 lc and i have a strange problem with it. Problem when i start the truck when it is cold it idles smooth. if i try to drive it right away the truck engine runs really rough. I noticed if I start the truck when it is cold, then wait about 10 seconds (for oil pressure to build...

I removed and cleaned the throttle body on my 1999 LC. My car has 270,000 miles. The Throttle body had lots of carbon buildup. I also unscrewed the PCV valve hose that connects the intake to the PCV valve on the top of the throttle body and removed tons of sludge from the inside. It was almost...

Howdy Guys, got an issue that i cant quite put my finger on got a 1997 1FZ in Australia (So No Cats ETC) 495xxxkms Top end rebuild 25xxx ago, Petrol/LPG Its been running super rich lately, getting about 26LT/100km and extremely poor when it first starts in the morning. At first the idle will...

I recently picked up a stock '18 GX460 w/ 35k mileage and clean carfax. I feel that it rides as it should and I don't really notice from looking at it or during the drive the infamous "KDSS lean". It maybe happens twice a week? but I notice that when I have my foot on the brake whether it'd be...

Hi everyone, new to this forum. Recently I picked up an fj60 needing a bit of TLC everything worked great for about 3 months until the battery was swapped now it dies unless given gas on startup. Radio/features also do not work anymore. Originally I thought it was because the connectors were...

Hello, I own a 1993 Hilux Surf SSR-X 2lt-e. I recently replaced the head (big surprise, I know) and now it starts very rough. When I first start it for the day it spews white smoke and idles very roughly for a minute or two. Once it is warmed up it consistently bellows black smoke. I assume...

Hey guys, my idle has been a little rough in my fj80. In park my idle is normal and good at around 650 rpm. When I idle in drive (like at a stop light), however, my idle drops below 600 rpm and sounds really rough. My oil pressure gauge also drops but I figured that was just a normal thing for...

Morning everyone, I have a low idle at 600 rpm, but when the AC is on, I hear a click from the engine bay, and the car idles at about 900rpm. About two minutes later, another click (which sounds like an "off" click), comes from the engine, and the car nearly stalls at 200 rpm until it rises to...

I have been chasing down a lumpy/hiccupy idle on my FZJ80 since I brought it home and I am *almost* done with baselining, at which point I will just accept that's the way it is. My wife has her brand new NX300h in the shop (rodent damage to a wiring harness - don't get me started) and we have a...

1997 FZJ80 - stock 250K total miles 60K miles ago - HG, new head, new everything "upper engine" besides intake/TB Hiccupy idle and running rich. I describe it as hiccupy because it isn't stumbling, low, high, or even shaking the truck. You can only really feel it in your seat, and it's not 100%...