2001 saturn SL2 1.9 DOHC p0301 & p0410 codes

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#1
The car has developed a slight miss. rpm 750 in drive. p0301 misfire on cyl 1. I am going to replace the wires, plugs & ignition coils first. All of these were actually replaced within 20,000 miles ago. The car runs strong on the freeway. It does not stumbles on acceleration. My question is the p0410 code. Can this air pump create a misfire symptom? Thanks in advance for any help. :(
 
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#2
if there is a p0301 be sure to 'read' the #1 plug- wet, dry, black, tan, clean. Also an issue at 20k miles- I would ask are these AC Delco plugs etc?

p0410 attachment

[attachment deleted during maintenance]
 

Gus

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#3
"I am going to replace the wires, plugs & ignition coils first. All of these were actually replaced within 20,000 miles ago. "

Then why replace them again? Check plugs first, as suggested...If OK, switch 1 and 2 plugs.....Check coil output with a spark tester......did you use OEM parts?
 
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#4
I bought the car used in May 11 (20,000 miles) I have the old coils & wires were given to me at purchase. I do know that the wires & coils were from auto zone. I have not pulled the plugs yet. My question was "could the p0410 air pump code have anything to do with the miss?"
 

billr

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#6
My guess is that an air injection problem would not cause a misfire.
 

Gus

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#7
P0410 sets, usually when the air pump ISN'T running, or the valve is not opening......so I doubt it will cause a misfire....
 
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#8
Saturn

Before I pulled the plugs. I checked all the vacuum hoses again. The plastic vac tube that crosses over the valve cover from the air pump solenoid did have a crack in it. I replaced the tube and this eliminated the miss. I erased the SES codes and have driven the car for >100 miles. the SES light has remained off and no miss. Thanks to all for their input!