I have a 1997 grand am se with the 2.4 DOHC
Lately I have been noticing the engine stumbling hard when idling at random times. It didn't it do it frequently but like ever other minute or once in a blue moon if that makes sense.
So that tempted me to pull the spark plugs and check things out. I have the AC Delco platinum plugs but they were gapped real close like .030-.035 and have been this way for at least 2 years.
I had major bucking going uphill 2-3 years ago and changed the plugs and it stopped that. Apparently I gapped them at the time to .030-.035 I have no idea why I don't remember.
So now yesterday I pull the plugs and go to put back everything together and the engine severly misfires and I can smell fuel but no check engine light.
I took everything apart and reinstalled it about 20 times and still nothing brings it back to running the way it was. I had an old set of coils, module and the plastic housing so I swapped them in and still the same engine major misfires and fuel smell and no check engine light.
Could it be that I just have a bad coil even though I swapped them out with 2 other coils I had? I put my meter on the plastic housing with the coils installed and I got 6.0 reading with the meter to plug 1-4 and 2-3.
I think that is in specs for coils? Also no cracks in that plastic housing no arc marks and I have new ignition boots.
Very odd! I'm thinking I just have a bunk coil and a bad one in the old pair i had. I had a spare module I swapped and still the same problem.
Ideas?
Lately I have been noticing the engine stumbling hard when idling at random times. It didn't it do it frequently but like ever other minute or once in a blue moon if that makes sense.
So that tempted me to pull the spark plugs and check things out. I have the AC Delco platinum plugs but they were gapped real close like .030-.035 and have been this way for at least 2 years.
I had major bucking going uphill 2-3 years ago and changed the plugs and it stopped that. Apparently I gapped them at the time to .030-.035 I have no idea why I don't remember.
So now yesterday I pull the plugs and go to put back everything together and the engine severly misfires and I can smell fuel but no check engine light.
I took everything apart and reinstalled it about 20 times and still nothing brings it back to running the way it was. I had an old set of coils, module and the plastic housing so I swapped them in and still the same engine major misfires and fuel smell and no check engine light.
Could it be that I just have a bad coil even though I swapped them out with 2 other coils I had? I put my meter on the plastic housing with the coils installed and I got 6.0 reading with the meter to plug 1-4 and 2-3.
I think that is in specs for coils? Also no cracks in that plastic housing no arc marks and I have new ignition boots.
Very odd! I'm thinking I just have a bunk coil and a bad one in the old pair i had. I had a spare module I swapped and still the same problem.
Ideas?
