Just started running rough miss firing at idle and lower speeds. Throws no codes
Check for plug leads touching each other. Check for moisture in distributor cap if you have one. Check plugs and replace if necesary
95 camaro 5.7. Also car has chip in it modified kit, when I bought it. So no codes on readercleaned map sensor, key way looks like it may have jumped time. Removing harmonic balancer now, pain in the @$$. Cleaned temp. control sensor, checked 4 vac leaks. Spark plugs were reddish color looked like running lean? or95 camaro 5.7. Also car has chip in it modified kit, when I bought it. So no codes on reader
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SOURCE: miss fire #3 cyld. compression 125psi idle speed 2500 rpm
Hi
A faulty IAC would cause a random misfire rather than a misfire in a specific cylinder, as would an intake air leak, both of which would cause a high idle amongst other things.
Run the engine until its good and hot, disconnect the injector harness plug so the injectors are disabled, remove all the spark plugs, disable the ignition by unplugging the wiring connector(s) from the coil pack(s), and then carry out another compression test on al the cylinders.
If the compressions are now all relatively the same then you very highly likely have a faulty injector in cylinder 3.
Very best regards
Geordie
SOURCE: 1995 Volvo 960 idles rough, Emission Control light on dash is on
Possible intake gasket leak causing a misfire, or plugs or coil causing a misfire. each cylinder has its own coil. You can hear the vaccuum leak with your ears under hood if gasket is bad. Check eng codes at advance auto prob for free. If it has misfire codes only, prob coil or plugs. If misfire with fuel trim, prob gasket.
SOURCE: engine runs rough at certain speeds 3.0 v6 flex-fuel 1999 ranger
Check and see if the EGR valve is leaking, to check this spray water on it at idle, if the water steams off the valve is leaking and is the source of your problem, also are you sure you hooked the new DPFE sensor up right? re-check it..
SOURCE: Rattle/Shake during normal use, Rough Idle
1996 ,wow its classic its over 10yrs of age ,,,,,,renew it sounds like engine is finished
SOURCE: idle speed control throttle position lower limit
souds like you need a new throttle valve and once youve got tyat you need to carry out basic settings on the valve to adapt the valve to ecu good luck gtiR out.
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cleaned map sensor, key way looks like it may have jumped time. Removing harmonic balancer now, pain in the @$$. Cleaned temp. control sensor, checked 4 vac leaks. Spark plugs were reddish color looked like running lean? or
95 camaro 5.7. Also car has chip in it modified kit, when I bought it. So no codes on reader
CHANGE THE COOLANT TEMP SENSOR, THEY GO BAD
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