Misfire p0303 p0304 Help Please...
Thread Starter
|
Member
Joined: Mar 2014
Posts: 33
Likes: 0
Misfire p0303 p0304 Help Please...
2001 S40
P0303 P0304 Misfire in #3, and #4.
-Rough idle.
-random starting problems.
-sometimes almost stalling.
Car drives well when moving.
I'm running out of ideas...
-New coil in #3. Old one was cracked.
-Wires.
-Plugs. gapped, not damaged, normal wear.
Things I have done. Same codes plus symptoms after clearing and changing something. So far;
-I have change coils #3 to #4.
-Moved wires to different coil.
-Moved spark plugs to other cylinders.
-Moved fuel injectors 3-4 over to 1-2.
Still rough idle random hard starting and codes for misfiring in 3 and 4...
P0303 P0304 Misfire in #3, and #4.
-Rough idle.
-random starting problems.
-sometimes almost stalling.
Car drives well when moving.
I'm running out of ideas...
-New coil in #3. Old one was cracked.
-Wires.
-Plugs. gapped, not damaged, normal wear.
Things I have done. Same codes plus symptoms after clearing and changing something. So far;
-I have change coils #3 to #4.
-Moved wires to different coil.
-Moved spark plugs to other cylinders.
-Moved fuel injectors 3-4 over to 1-2.
Still rough idle random hard starting and codes for misfiring in 3 and 4...
Junior Member
Joined: Jun 2016
Posts: 1
Likes: 0
S40 Volvo T5 2006
Same problem here....turned out to be head gasket leaking into cylinder intermittently. Hope this helps.
2001 S40
P0303 P0304 Misfire in #3, and #4.
-Rough idle.
-random starting problems.
-sometimes almost stalling.
Car drives well when moving.
I'm running out of ideas...
-New coil in #3. Old one was cracked.
-Wires.
-Plugs. gapped, not damaged, normal wear.
Things I have done. Same codes plus symptoms after clearing and changing something. So far;
-I have change coils #3 to #4.
-Moved wires to different coil.
-Moved spark plugs to other cylinders.
-Moved fuel injectors 3-4 over to 1-2.
Still rough idle random hard starting and codes for misfiring in 3 and 4...
P0303 P0304 Misfire in #3, and #4.
-Rough idle.
-random starting problems.
-sometimes almost stalling.
Car drives well when moving.
I'm running out of ideas...
-New coil in #3. Old one was cracked.
-Wires.
-Plugs. gapped, not damaged, normal wear.
Things I have done. Same codes plus symptoms after clearing and changing something. So far;
-I have change coils #3 to #4.
-Moved wires to different coil.
-Moved spark plugs to other cylinders.
-Moved fuel injectors 3-4 over to 1-2.
Still rough idle random hard starting and codes for misfiring in 3 and 4...
Thread
Thread Starter
Forum
Replies
Last Post
schmuecker
1998-2000 model year V70
12
Jul 27, 2012 01:26 AM
zerofallout
Volvo V70
8
Oct 27, 2010 06:11 AM
