trying to resolve P0303 error on '01 Neon SE with auto tranny
#1
trying to resolve P0303 error on '01 Neon SE with auto tranny
My vehicle: 2001 Neon SE with automatic
My symptoms:
1) extra-rough idle
2) engine killing while stopped with brakes on, in drive.
My codes:
P0303 - cylinder #3 misfire
P0171 - fuel lean
My trial fixes:
new plugs/wires
new coil pack
cleaned intake thoroughly
removed/cleaned/replaced all 4 fuel injectors
Thinking I had a bad injector on cylinder #3, I swapped injectors #3 and #4. This would/should give me a new code for a cylinder #4 misfire but did not. I am still getting a P0303 code, but not the P0171 code that I was getting earlier. What else could be causing this problem with my 3rd cylinder??
My symptoms:
1) extra-rough idle
2) engine killing while stopped with brakes on, in drive.
My codes:
P0303 - cylinder #3 misfire
P0171 - fuel lean
My trial fixes:
new plugs/wires
new coil pack
cleaned intake thoroughly
removed/cleaned/replaced all 4 fuel injectors
Thinking I had a bad injector on cylinder #3, I swapped injectors #3 and #4. This would/should give me a new code for a cylinder #4 misfire but did not. I am still getting a P0303 code, but not the P0171 code that I was getting earlier. What else could be causing this problem with my 3rd cylinder??
#4
#5
I wish I could help you but I have the same problem with my 94 Neon. P0303 code with rough idle, but it is not constant. When I drive it there is no problem but when my daughter drives it the check engine light comes on and idles very rough.
I was going to get a new coil tomorrow but after reading your post I am not sure what to do.
Has anyone on this board every fixed this problem?
I was going to get a new coil tomorrow but after reading your post I am not sure what to do.
Has anyone on this board every fixed this problem?
#6
#7
Technical service bulletin for p0300 p0301 p0302 p0304 codes
I found this technical service bulletin
SUBJECT:
Flash: Idle fluctuation and or MIL Illumination Diagnostic Trouble Codes P0300, P0301,P0302, P0303 or P0304
You can see it at
http://www.ertyu.org/steven_nikkel/n.../18-024-04.pdf
It looks like the PCM may need reprogramming.
SUBJECT:
Flash: Idle fluctuation and or MIL Illumination Diagnostic Trouble Codes P0300, P0301,P0302, P0303 or P0304
You can see it at
http://www.ertyu.org/steven_nikkel/n.../18-024-04.pdf
It looks like the PCM may need reprogramming.
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#8
I wish I could help you but I have the same problem with my 94 Neon. P0303 code with rough idle, but it is not constant. When I drive it there is no problem but when my daughter drives it the check engine light comes on and idles very rough.
I was going to get a new coil tomorrow but after reading your post I am not sure what to do.
Has anyone on this board every fixed this problem?
I was going to get a new coil tomorrow but after reading your post I am not sure what to do.
Has anyone on this board every fixed this problem?
#9
My brother is having a similar issue with his ride all of a sudden. Wasn't getting codes till I changed the plugs (which were needed). Then had battery corrosion out the wazooo. I then pulled codes P0301 and P1684. I did swap the coils and got the same codes. How to do you get to the injectors for swapping? Is there anything else that may be a quick check?