Sponsor Message:
Non Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Question For Car Buffs: Engine Shudders. Why?  
User currently offlinePanAm330 From United States of America, joined Mar 2004, 2679 posts, RR: 9
Posted (7 years 6 months 2 weeks 3 days ago) and read 6301 times:

My friend has a 2003 Dodge Neon that lately has been shuddering, and one time even ceased. I've noticed the shudders only at idle (after it has just been started up, at a stop light, etc), however it's "bucked" a few times when going 30 or 40mph. After a talking with my father, he suggested that it could be the spark plugs, or the timing belt. I figured that I might as well ask here before I go and get charged by a mechanic to tell me something I might have been able to find out on my own. Does anyone know what could possibly be causing this?

Thanks to all in advance! All input is appreciated.  Smile

16 replies: All unread, jump to last
 
User currently offlineCheckraiser From , joined Dec 1969, posts, RR:
Reply 1, posted (7 years 6 months 2 weeks 2 days 23 hours ago) and read 6294 times:

Could be a lot of things. Bad fuel filter or pump. Bad injector(s).

Is it throwing any codes?


User currently offlinePanAm330 From United States of America, joined Mar 2004, 2679 posts, RR: 9
Reply 2, posted (7 years 6 months 2 weeks 2 days 22 hours ago) and read 6277 times:

Quoting Checkraiser (Reply 1):
Is it throwing any codes?

Forgive my ignorance, but what does that mean?


User currently offlineAirportSeven From United States of America, joined Feb 2007, 327 posts, RR: 0
Reply 3, posted (7 years 6 months 2 weeks 2 days 22 hours ago) and read 6274 times:

It may need a throttle body service. This involves among other things cleaning the throttle position sensor and resetting the idle.

User currently offlineKlaus From Germany, joined Jul 2001, 21462 posts, RR: 53
Reply 4, posted (7 years 6 months 2 weeks 2 days 22 hours ago) and read 6267 times:

There are too many potential reasons that it would be useful to speculate here. Have the car checked out to find the real reason.

User currently offlineEWS From , joined Dec 1969, posts, RR:
Reply 5, posted (7 years 6 months 2 weeks 2 days 22 hours ago) and read 6260 times:

Another possibility is the MAF sensor, if its packed in its not sending enough air into the engine which would cause it to shudder.

Lew


User currently offlineCheckraiser From , joined Dec 1969, posts, RR:
Reply 6, posted (7 years 6 months 2 weeks 2 days 22 hours ago) and read 6260 times:

Quoting PanAm330 (Reply 2):
Forgive my ignorance, but what does that mean?

In a nutshell, is or has the check engine light been coming on?


User currently offlineLTU932 From Germany, joined Jan 2006, 13864 posts, RR: 50
Reply 7, posted (7 years 6 months 2 weeks 2 days 21 hours ago) and read 6245 times:

Check if all spark plugs are connected to the electric system or that the cable that connects to one of the spark plugs isn't damaged. One time it happened to us that our engine stalled and one of the connectors went lose, meaning that once we restarted the engine, it was shuddering and stuttering all the time. We didn't find out about this until we went to a shop nearby. We drove for some 10 or 15 miles with only two of three cylinders, and even had to go uphill several times. It was a real strain, but the engine held through and once we found out the problem, it was a less than 5 minute fix for us and we were back in business.

If the car has a carburator, I'd check if there isn't something that is interrupting the airflow, like a rupture in the rubber "pipe" (don't know how to say it in English) that goes from the air filter to the carburator. If there is such a rupture, the car can still drive with no problem, but there will be lots of shudders when the engine is idle.


User currently offlineTZ757300 From United States of America, joined Aug 2005, 2868 posts, RR: 6
Reply 8, posted (7 years 6 months 2 weeks 2 days 20 hours ago) and read 6217 times:

Since it sounds like its speed related since it does it at idle and at around 30-40mph, it might well be the distributor. It may not be catching with the cam or even the cam is locking up somewhere and causing the bucking or stalling. Or perhaps its the transmission. Its probably an auto knowing its a neon in the US, but a problem I had once that something would lock up in the transmission sometimes and would make the engine shudder a little bit or if it locked up long enough, stall the engine.

Really, it could be a wide array of things. I would just go to the dealer and get it checked out. Just for reference, what kind of engine do you have?



LETS GO MOUNTAINEERS!
User currently offlineCheckraiser From , joined Dec 1969, posts, RR:
Reply 9, posted (7 years 6 months 2 weeks 2 days 19 hours ago) and read 6201 times:

A 2003 would not have a carb or a distributor.

User currently offlineAsstChiefMark From , joined Dec 1969, posts, RR:
Reply 10, posted (7 years 6 months 2 weeks 2 days 19 hours ago) and read 6196 times:

Quoting EWS (Reply 5):
Another possibility is the MAF sensor, if its packed in its not sending enough air into the engine which would cause it to shudder

I'd like to bet $100 on Lew to win.

Mark


User currently offlinePanAm330 From United States of America, joined Mar 2004, 2679 posts, RR: 9
Reply 11, posted (7 years 6 months 2 weeks 2 days 18 hours ago) and read 6182 times:

Quoting Checkraiser (Reply 6):
In a nutshell, is or has the check engine light been coming on?

The check engine has come on once (this morning), and stayed ever on since.

It could be any one of the things all of you have suggested (and for those suggestions, I thank you), and I'll let you know once we bring it to the mechanic. Thanks again!  Smile


User currently offlineTz757300 From United States of America, joined Aug 2005, 2868 posts, RR: 6
Reply 12, posted (7 years 6 months 2 weeks 2 days 16 hours ago) and read 6159 times:

Quoting Checkraiser (Reply 9):
A 2003 would not have a carb or a distributor.

I beg to differ. I agree that modern cars don't have carbs (last one like 1991?) but i know some have distributors. Some cars do have distributorless engines, but many arn't.



LETS GO MOUNTAINEERS!
User currently offlineBill142 From Australia, joined Aug 2004, 8451 posts, RR: 8
Reply 13, posted (7 years 6 months 2 weeks 2 days 16 hours ago) and read 6149 times:

Could be spark plug leads. You can see if one is faulty by pulling them off the plugs one by one and seeing if there is a spark hitting the engine block. But whatever you do, don't touch the spark!

User currently offlineGEEDO From United States of America, joined Feb 2004, 366 posts, RR: 0
Reply 14, posted (7 years 6 months 2 weeks 2 days 14 hours ago) and read 6139 times:

Quoting PanAm330 (Reply 2):
Forgive my ignorance, but what does that mean?

Most vehicle's electronic brains store self-diagnostic codes when an engine/fuel management device is giving bad signals. Once this code is "de-coded", a particular part replacement can be determined. Codes are usually read in the shop by a hand held tester that plugs into the car's diagnostic connector. On some cars, two pins on that same plug can be shorted to make the "check engine" light on the dash blink to give the code. Obviously, you would need to check the [i]factory[i/] technical manuals for your make and model for any shortcuts like that, but codes can tell a lot.

My money says its your oxygen sensor. A bad sensor usually makes for rich fuel mixtures, which makes for rough idling. Good luck!



I've got Titanic hopes and they aren't sinking
User currently offlineAndz From South Africa, joined Feb 2004, 8453 posts, RR: 10
Reply 15, posted (7 years 6 months 2 weeks 2 days 13 hours ago) and read 6127 times:
Support Airliners.net - become a First Class Member!

Quoting Checkraiser (Reply 6):
check engine light

Brings new meaning to the term: "idiot light"

The car isn't going well....duh! Check the engine!  Wink



After Monday and Tuesday even the calendar says WTF...
User currently offlineJetMech From Australia, joined Mar 2006, 2699 posts, RR: 53
Reply 16, posted (7 years 6 months 2 weeks 2 days 7 hours ago) and read 6108 times:

Quoting PanAm330 (Thread starter):

G'day PanAm330  Smile,

My car is actually doing the same thing, that is, "bucking" when driving along, not shuddering at idle. The engine "bucks" mostly when driving up an incline with revs that are a little too low for the speed. Given my car has almost 180,000km (112,500 miles) on the clock, I suspect that it is the clutch slipping momentarily that is causing the problem.

Regards, JetMech



JetMech split the back of his pants. He can feel the wind in his hair.
Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Question For Car Enthusiasts posted Sun Jul 29 2001 18:01:38 by DTW_Steve
Mechanical Question For You Car Nuts posted Tue Jun 13 2006 18:05:42 by RNOcommctr
Car Question For Any Mechanics On Here posted Thu May 12 2005 04:19:27 by AC_A340
A Stupid Car Question For The Mechanics posted Thu Mar 10 2005 05:39:27 by CaptOveur
Question(s) For You Religious Buffs. posted Thu Feb 26 2004 03:17:01 by Aa61hvy
Question For The French posted Wed Feb 7 2007 15:15:08 by Dougloid
Question For American Idol Fans posted Fri Feb 2 2007 21:55:43 by 9V
Question For EBayers posted Sun Jan 28 2007 16:52:36 by BristolFlyer
Question For The Webmaster/developers Re Wikipedia posted Tue Jan 16 2007 04:16:28 by RobK
A Question For Americans Re: Cell Phones & Plans posted Mon Jan 15 2007 03:01:40 by HALFA