SOURCE: 1998 ram 1500 5.9 gas rough idle,hissing sound from air filter
SHOWING MISFIRES ON SCAN TOOL?IF NOT,ENGINE CONTROLLER HAS NOT LEARNED MISFIRE MONITOR..WILL HAVE TO BE DRIVEN A BIT FOR RELEARN..IF YOU CAN SEE MISFIRES..MISFIRING ON MORE THAN 1 OR ALL CYLINDERS?CHECK UNDERSIDE OF IGNITION COIL FOR CRACKS..IF NOT CRACKED,YOU MAY HAVE A FAULTY CRANK SENSOR..ANY CORRODED PLUG WIRES AT DISTRIBUTOR CAP?ALSO CHECK IF ANY OIL PRESENT IN INTAKE MANIFOLD..GASKET ON BOTTOM OF INTAKE MAY BE BROKEN CAUSING AN INTERNAL VACUUM LEAK
Hello
When the service engine
soon light a yellow light (Also called the check engine light or
engine management light) is turned on this is to alert you to the
fact that Powertrain Control Module (computer) has detected a
failure somewhere in the systems it controls you may not feel any
difference in the way the engine runs, this can be the transmission
or the engine or emission system, there are fault codes set in the
modules memory for these faults. What needs to happen now is to have
the powertrain control module scanned with a special tool called an
OBD2 electronic engine control scanner or a OBD2 code reader. Once
the code(s) are read then you must perform the diagnostics for each
code and make the appropriate repairs based on the findings of the
diagnosis that was performed, this is called doing "Pinpoint"
testing.
Hello
When the service engine
soon light a yellow light (Also called the check engine light or
engine management light) is turned on this is to alert you to the
fact that Powertrain Control Module (computer) has detected a
failure somewhere in the systems it controls you may not feel any
difference in the way the engine runs, this can be the transmission
or the engine or emission system, there are fault codes set in the
modules memory for these faults. What needs to happen now is to have
the powertrain control module scanned with a special tool called an
OBD2 electronic engine control scanner or a OBD2 code reader. Once
the code(s) are read then you must perform the diagnostics for each
code and make the appropriate repairs based on the findings of the
diagnosis that was performed, this is called doing "Pinpoint"
testing.
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