I scanned my 2000 grand am 2.4l got code p0300 i changed batt.starter.alternator.plugs etc. Starts and runs now but back fire's, has no power and engine shacks bad ontell About 3000 rpm??

Lou Jen

Asked by Jan 23, 2015 at 12:32 AM about the 2000 Pontiac Grand Am SE

Question type: Maintenance & Repair

3 Answers


Google obd 2 p0300 battery starter alternator were waste of $. This may have a multiple coil pack for the ignition spark. I would start there. There are quite a few things to consider. I'm surprised there isn't more than random miss fires. That is why I would start at the coil paxk.


change your spark plug wires and coils. also your fuel injectors may be clogged. get a hei spark tester and do a spark test on your coils. You can get coils for 17.98 each at www.partsgeek.com.


your coils are definitely bad.

Your Answer

Add photo

Related Questions

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 2,000 nationwide Grand Am listings starting at $1,995.


Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
Reputation 7,080
#2 John Saffrahn
John Saffrahn
Reputation 1,480
#3 Tom Demyan
Tom Demyan
Reputation 1,240
View All

Related Models For Sale

Used Pontiac Grand Prix"
28 Great Deals out of 4,397 listings starting at $1,972
Used Chevrolet Impala"
948 Great Deals out of 35,754 listings starting at $700
Used Pontiac Firebird"
11 Great Deals out of 895 listings starting at $2,900
Used Chevrolet Camaro"
812 Great Deals out of 38,797 listings starting at $2,650
Used Ford Mustang"
717 Great Deals out of 41,256 listings starting at $900
Used Chevrolet Malibu"
1,146 Great Deals out of 72,632 listings starting at $695
Used Pontiac Bonneville"
3 Great Deals out of 863 listings starting at $1,450
Used Honda Civic"
1,122 Great Deals out of 58,107 listings starting at $1,300
Used Nissan Altima"
1,373 Great Deals out of 87,444 listings starting at $1,195
Used Honda Accord"
1,269 Great Deals out of 77,637 listings starting at $1,395