Lexus Firm Staff. has written: 'The Rough Guide to French Dictionary Phrasebook'
The year and engine size would help but you may have a bent valve or bent pushrod for # 4 cylinder if that is the only cylinder that has 0 for compression.
With mine, the rough idle was fixed by changing the spark plug wires.
If the timing chain has jumped time, the vehicle will run rough or not at all. You will need to check the time with a timing light to see if it is off.
check vacum hoses timing and tune up
The timing is nonadjustable. Try changing the plugs and wires. Also you may have the new belt mis-aligned by one or two teeth!! The car will run but have a rough idle. Buy a Service Manual for the alignment procedure.
If the engine runs rough after a timing belt change, the belt may not have been tightened properly. It may also mean that the wrong timing belt was installed. Either way, it needs to be taken back to the mechanic.
Timing Belts need to be changed around 100k miles or every 6 years. These are safe averages. Timing Belts like tires breakdown with age so it is not just a mileage issue.Other indicatons are an engine that runs rough when coming to a stop or idling. Worn timing belt result in trouble codes from the camshaft or crankshaft sensors, causing a dashboard warning light.
replace timing chain
Not unless the bearing in that pulley is noisy or rough when you spin it.
Your timing is off. Buy a timing light.
The timing may be off a tooth, or maybe a vacuum line was not hooked back up.
If the timing is off by a few degrees the engine can start but will run rough. More than a few (depending on the engine) it will not start.
Engine cuts out intermittently, runs rough.
if it idles rough too, check your plugs, if not, check your fuel filter.
Motor mounts are bad
Stalling rough. Like stalling while on a hill. That made mine skip.
Sounds like a timing issue. Maybe the timing belt jumped. Take it to an Autozone, I think they do a free chek on computer codes.
Double check the firing order, you may have a couple of spark plug wires crossed. Also do a compression test, you may have bad valves.
Could be a burned valve (do a compression test of all cylinders) Could be a timing problem (check the timing)
If you have a worn timing chain that hasnt been changed before, that can cause the timing to jump and cause your car to run very rough or not run at all
Normally it will become noisy and your engine may run rough and be hard to start.
Up to approx 2001 most do from then mostly chain for petrols as a rough guide
It will either run rough or won't start at all