Question about Cars & Trucks
It was running great then all of a sudden no power, rough idle, low idle like it had fouled plug. replaced plugs, wires, rotor an cap an air filter. still runs the same. it doesnt smoke an no noises coming from engine. it will die when u put it in gear. (auto tranny)
My first guess would be a weak coil or something going on with the carb.
It could have jumped time but you would probably hear noise coming from the timing chain.
Can you tell if it is not firing on one cylinder ? Checked compression ?
Too rich or too lean on the fuel mixture ?
Posted on Jan 19, 2013
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Posted on Jan 02, 2017
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
Posted on Mar 05, 2010
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