2004 Grand Am is down 2 cyclinders. Replaced PCM but is still misfiring on one cyclinder. Fuel injection appears to be working. What is going on?

10

Asked by Apr 20, 2016 at 03:26 PM about the 2004 Pontiac Grand Am GT

Question type: Maintenance & Repair

6 Answers

5,445

NEW battery (cause yours is almost 10) new battery cables (if you cannot clean the corrosion with a wirebrush) and assure the bolt that connects the cable to the engine is free of corrosion and the one that connects to the chassis is free of corrosion~ with RESTORED 12.5 volts we will have a shot at the car working correctly~

5,445

Interstates are Good...my dad removed the LEAD from automotive battery design...yay~ but test with a multimeter...should have 12.5 volts ....cannot expect a LOAD test these days because the tin/antimony alloy design does not recharge very easily...in fact hardly at all towards the end of it's life~ so would check the voltage at the ECU..make sure that it's got the full 12 volts~

5,445

wirebrush connections to the motor block and to the frame/chassis~ this will make a difference in available amperage~

10

This is not the problem; but thanks for your input. Anyone else have any suggestions!

5,445

Cracked distributor cap...not done LIsa...just questioning your power situation...cracked distributor may lead to TWO dead cylinders~

10

This ended up being a broken valve spring on cyclinder #2! Got the right mechanic who diagnosed it in less than 24 hours. I'm back behind the wheel!

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,183 nationwide Grand Am listings starting at $1,599.

ZIP:

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,690
#2 John Saffrahn
John Saffrahn
Reputation 1,600
#3 Tom Demyan
Tom Demyan
Reputation 1,440
View All

Related Models For Sale

Used Pontiac Grand Prix
30 Great Deals out of 2,863 listings starting at $1,600
Used Chevrolet Impala
590 Great Deals out of 34,064 listings starting at $899
Used Pontiac G6
91 Great Deals out of 4,082 listings starting at $1,650
Used Ford Mustang
543 Great Deals out of 45,845 listings starting at $1,999
Used Nissan Altima
1,154 Great Deals out of 79,676 listings starting at $500
Used Pontiac GTO
4 Great Deals out of 465 listings starting at $6,000
Used Chevrolet Malibu
1,060 Great Deals out of 77,908 listings starting at $1,500
Used Honda Accord
948 Great Deals out of 77,739 listings starting at $899
Used Honda Civic
814 Great Deals out of 88,107 listings starting at $1,299
Used Chevrolet Monte Carlo
20 Great Deals out of 1,419 listings starting at $1,995
Used Chevrolet Corvette
149 Great Deals out of 20,684 listings starting at $3,995
Used Pontiac Bonneville
4 Great Deals out of 511 listings starting at $1,799

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.