Replaced spark plugs and wires
SOURCE: 1994 Cadillac DeVille Concourse - Runs rough?
The "check engine" light will "light" when there is a malfunction in the engine management system. The fault code is then stored in the computer. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. We recommend buying your own scanner and doing it yourself. With a pocket scanner you can check for fault codes to find out why the light came on in the first place. You can clear your cars trouble codes after you replace the malfunctioning sensors.
SOURCE: engine runs rough at idle and seems to miss
I don't think the computer, maybe the throttle position sensor, EGR valve, it could be a few different things but would put the computer at the end of the list. These will have to be checked for correct ohms and voltage to determine which isn't putting out the right ohms to work right.
SOURCE: when i first start my
a code for lean or lean condition typically indicates a vacume leak ,lean refers to too much air or not enough fuel too much air or more air than expected "leans" the fuel mixture, usually a vacume leak or a leak in the air intake system is the problem also i would have the coolant temp sensor checked out
Testimonial: "thank you so much, i believe this to be the problem too"
SOURCE: miss fire code p0300
If your experiencing a misfire, this indicates the need for a new ignition coil
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