I have a new stutter and a CEL, need advice

S

SMRcalidiv

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Jul 28, 2006

#1

• Jul 28, 2006

• #1

Well my car began stuttering today and idling roughly, then it threw the check engine light. I have not done anything to the car recently that I can look back on and it was running fine yesterday. There is new gas in the car and Ive just now used a quarter tank, but just driving it home I noticed I used more gas than normal...weird. Anyways, is there a cheap scan tool I could buy, I see them at Pep Boys/ Kragen and I would rather buy one than pay close to the same to have it scanned. Thoughts on the problem and the tool?

 

Stang|ess

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#2

• Jul 28, 2006

• #2

Autozone scans for free I believe.

 

ToplessStang

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Jul 28, 2006

#3

• Jul 28, 2006

• #3

Yup, get some codes and we'll figure it out .

 

Mike97gt

it doe snot

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#4

• Jul 28, 2006

• #4

get the codes and post them here..

 

G

GodAmGT00

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Jul 28, 2006

#5

• Jul 28, 2006

• #5

Have you tried pulling the plugs to see if they're fouled?? I'm thinking they will be, but if certain cylinders are more fouled than others, you may be able to start looking at things like igniters/coils...




JT

 

d98gt

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#6

• Jul 28, 2006

• #6

Since it's a guessing game until the codes are ran, I vote for a loose vac. line

The guys at the local Autozone know when I go that it's time for them to pull a code. They know me by name and guess my problem before we pull the code Sad thing is, I never go there unless I need a code pulled. I goto Oreilly which is right beside them for "shopping".

 

Mike97gt

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#7

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ok I am going to throw my hat in the guessing game.. It's a misfire caused by bad plug and COP.

 

d98gt

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The plug and COP? I'm going to win the bet with that guess.

I guess we'll see once he returns with the results

 

Mike97gt

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#9

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d98gt said:

The plug and COP? I'm going to win the bet with that guess.

I guess we'll see once he returns with the results

Click to expand...

Well if it's stuttering while driving then it's a misfire of some sort.. and the most common cause of a misfire is a bad COP and plug on the modular motors.

if it's only idling bad and is fine under part throttle then it could be a vac leak..

lets see what the codes are..

 

Stang|ess

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#10

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Hey, keep your guessing games out of tech

 

S

SMRcalidiv

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#11

• Jul 28, 2006

• #11

Ok, guys I am going to get s scanner here in a little while and I will post the codes. I would drive the car down to Autozone but after shooting a plug out of my head, TWICE, I would rather play it safe and wait. So stay tuned lol

 

d98gt

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#12

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Sounds good

and Mike, I was only kidding however when I threw my simple codes not long ago, I would get a "surge" at certain mph, but it would idle fine.

 

Mike97gt

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#13

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d98gt said:

Sounds good

and Mike, I was only kidding however when I threw my simple codes not long ago, I would get a "surge" at certain mph, but it would idle fine.

Click to expand...

I figured you were kidding.

 

S

SMRcalidiv

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#14

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OK guys here it is, P0302. The book says thats a misfire on the number two cylinder. I guess I'm just gonna go get a new cop and plug unless one of you guys says otherwise.

 

d98gt

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#15

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so I lost

 

S

SMRcalidiv

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#16

• Jul 29, 2006

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I guess Mike wins

 

d98gt

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#17

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Lucky guess

Anyways, I'd go with pulling the plug out first and inspecting it. If it looks bad then replace it. I don't have COPs so I can't offer any real advise on them

 

S

SMRcalidiv

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#18

• Jul 29, 2006

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I replaced both, and the stutter is gone. It was obvious that moisture had got down in there from when I cleaned my motor, but that was like 2 weeks ago. There was some rust on the ceramic and plug connector, but the tip of the plug looked fine. I may have been able to just replace the plug but I thought it was weird that there was such a long delay before the stutter. Maybe Ill try the cop on another cylinder to see if its bad. The one it was on was a PITA to get out with a bullitt intake, I actually had to take off the throttle body to get to it. Is there any way to test a COP without it on the car?

 

Mike97gt

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#19

• Jul 29, 2006

• #19

d98gt said:

Lucky guess

Anyways, I'd go with pulling the plug out first and inspecting it. If it looks bad then replace it. I don't have COPs so I can't offer any real advise on them

Click to expand...

My diag dartboard and crystal ball is always right

 

Mike97gt

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#20

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SMRcalidiv said:

I replaced both, and the stutter is gone. It was obvious that moisture had got down in there from when I cleaned my motor, but that was like 2 weeks ago. There was some rust on the ceramic and plug connector, but the tip of the plug looked fine. I may have been able to just replace the plug but I thought it was weird that there was such a long delay before the stutter. Maybe Ill try the cop on another cylinder to see if its bad. The one it was on was a PITA to get out with a bullitt intake, I actually had to take off the throttle body to get to it. Is there any way to test a COP without it on the car?

Click to expand...

As long as the stutter is gone then the COP is ok.. you have the second most common cause of misfires ( water in the plug holes) bad COP, plug is second,,