P300 code, I have been getting a p304 code and have done the usual stuff. Plugs,ignition coil, plug wires. Car runs fine, shakes a little when at a stop but runs good otherwise.

20

Asked by Nov 05, 2015 at 12:22 AM about the 2005 Dodge Neon 4 Dr SXT Sedan

Question type: Maintenance & Repair

Knocks when cold but gets quite when
warm. Today I got a p300 code, now what?
When I start the car it seems to lag when
starting like its starving for gas. It does start,
but just seems like it labors. Not sure what to
go next

3 Answers

72,145

The po300 code is a random misfire, since you replaced plug wires and plugs, Water in the gas can cause this. The po304 indicates a problem with #4 cylinder not firing properly, normal causes would be a plug, or wire, and or a coil for this cylinder. Since plugs & wires have been replaced, the coil would need to be checked out. Last would be a bad cylinder compression. Would do a compression test.

20

Did a compression test today. Cylinder 1 was 120 #2 was 120 #3 was 90 #4 80. Did a "wet" compression test on #4 it shot up to 120. So now what is the motor junk or should I just drive it till it dies. Lol

72,145

Drive it till it dies, Dodge Neon really not worth anything but scrap price, so ya you have a dying engine. Compression shooting up to 120 means the rings are bad. Looks like more than one cylinder is bad. Sorry...

Your Answer

Add photo

Related Questions

Neon

Looking for a Used Neon in your area?

CarGurus has 670 nationwide Neon listings and the tools to find you a great deal.

ZIP:

Search Dodge Neon Questions

Dodge Neon Experts

#1 Justin Gilmore
Justin Gilmore
Reputation 1,330
#2 Matt Thibault
Matt Thibault
Reputation 950
#3 Scott Goodyear
Scott Goodyear
Reputation 850
View All

Related Models For Sale

Used Dodge Neon SRT-4
30 listings starting at $5,495
Used Honda Civic
878 Great Deals out of 85,208 listings starting at $750
Used Dodge Charger
528 Great Deals out of 28,887 listings starting at $2,500
Used Ford Mustang
737 Great Deals out of 44,990 listings starting at $1,500
Used Ford Focus
815 Great Deals out of 55,193 listings starting at $1,200
Used Chevrolet Cobalt
56 Great Deals out of 3,846 listings starting at $500
Used Toyota Camry
1,223 Great Deals out of 85,031 listings starting at $750
Used Honda Accord
1,070 Great Deals out of 68,731 listings starting at $1,000
Used Toyota Corolla
1,002 Great Deals out of 70,070 listings starting at $1,800
Used Nissan Altima
1,320 Great Deals out of 76,089 listings starting at $1,695

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.