SOURCE: rough idle
fuel filters rarley cause idle problems. i would look at the egr valve or possible vaccume leaks.
SOURCE: Car hesitates when excelerating from
Check timing chain. Sounds like it may have jumped a cog.
SOURCE: 91 Jeep wrangler New everything idles rough, no Power then dies
you check for miss how is compression
SOURCE: 94 toyota camry dies at low idle. replaced plugs,
replace the 02 sensor or the egr valve in the intake manifold needs replace or cleanout and is carboned up
SOURCE: 1996 Honda Accord Rough Idle Even After tune up
Perform a valve clearance inspection and adjust if necessary. Tight or sticking valves will cause a misfire or rough running concern. Note: Perform valve adjustment when the engine is stone cold. 4cyl: INT 0.26mm EXH: 0.30mm (V6 engine are hydraulic and no adjust necessary.) Also check for a sticking or stuck open EGR valve. For diagnostic purposes only: Remove the EGR valve. Place a business card over the EGR passage and bolt the EGR valve back on. This plugs the EGR ports and if the misfire goes away the EGR valve is partially stuck open and is defective.
Check for low fuel pressure. Check for low compression. Check cam timing. Check for a weak ignition coil. Also don't over look the possibility of worn or broken engine mounts which cause excessive engine movement and engine vibration. -hope this helps
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