Go Back   Volvo Forums - Volvo Enthusiasts Forum > General Volvo Forums > General Volvo Chat
Sign in using an external account
Register Forgot Password?
Search

Welcome to Volvo Forums!
Welcome to Volvo Forums,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Volvo Forums today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-29-2010, 04:26 PM
Junior Member
 
Join Date: Aug 2010
Location: Portland, Oregon
Posts: 5
Default Volvo 240 Engine Shaking

Hey guys,

I'm brand new to the site but I've always looked on here for advice with car issues and found it to be informative. I decided to post because I'm having engine shaking issues that I couldn't find an answer on here for, and my local mechanics are baffled.

I have a 1990 240 DL with 165,000. I have been having engine shaking issues since I bought it a few months ago, but it was been getting worse. I used to be able to start the car and push on the gas for a few seconds and the shaking would cease for the rest of the trip. I then had the gaskets replaced and had a refurbished cylinder head put on because the mechanic had a spare and he recommended it to my old one. Since I got it back the engine shakes worse than before and doesn't go away, but it does seem to get a bit better after the engine is warm.

Work done to correct: Fuel injector cleaning (at shop with professional washing), new injector seals, new PCV, new engine mounts, spark plugs, cleaned MAF, mechanic said distributer and wires are fine, and he adjusted the idle higher to try and reduce the shaking.

I don't want to make this a two part question, but the temp gauge has been showing that the engine is overheating a bit (gets near the top sometimes on freeways), but am unsure if the idle adjustment or shaking has anything to do with this.

Please help! If this question has been talked about and resolved and I somehow missed the thread please direct me there.

Thanks and, I look forward to a response because it's literally baffled 3 mechanics in my town, all at Volvo shops.

Josh
Reply With Quote
  #2  
Old 08-29-2010, 08:36 PM
Member
 
Join Date: Aug 2010
Posts: 44
Default

here is a dumb question that may be because of your wording but- have you checked all the motor mounts? excessive engine vibration may just be one or more bad motor mounts. have someone watch the engine and power brake it in forward then reverse and watch each motor mount- too much play means a bad mount which equals "shaking".
Reply With Quote
  #3  
Old 08-30-2010, 05:31 PM
Junior Member
 
Join Date: Aug 2010
Location: Portland, Oregon
Posts: 5
Default

Thanks for the reply. Yes, I had the mounts replaced recently. It seemed to help a little bit but it still shakes like crazy.
Reply With Quote
  #4  
Old 08-30-2010, 05:39 PM
Senior Member
 
Join Date: Nov 2007
Posts: 149
Default

A rough running engine can be from one cylinder not firing, and one possible culprit if you've changed the plugs would be the plug wires.

I am not a mechanic, but one way to test if a cylinder isn't firing would be to pull a spark plug wire from the distributor cap, and see if the shaking gets worse, then reinstall it and go to the next wire. Continue on until you've pulled and reinserted all four. If any of them were pulled with no degradation in engine smoothness - then that's a cylinder that's not firing as it is. Try to get to the bottom of that (e.g. try to replace the wire, would be a simple/cheap thing to start with).
Reply With Quote
  #5  
Old 08-30-2010, 09:29 PM
Member
 
Join Date: Aug 2010
Posts: 44
Default

thats an excellent idea- some good advice to go along with it would be not to pull the wires off while the car is running. ZZZAAAAPPPP

another idea just came to me as i re-read your first post. if the car runs rough and seems to overheat you may have a head gasket problem. one great way to test is with a hydrocarbon tester. its kinda like a turkey baster that "sniffs" your coolant for hydrocarbons (unburned gas vapors). call around and see if any shops have one or buy your own:
http://www.napaonline.com/Search/Det...006_0282501448

Last edited by titaniums6025t; 08-30-2010 at 09:46 PM.
Reply With Quote
  #6  
Old 08-31-2010, 09:04 PM
rspi's Avatar
Administrator
1995 Volvo 850
My Garage
 
Join Date: Mar 2009
Location: Albuquerque, NM
Posts: 15,419
Send a message via Yahoo to rspi
Default

My guess would be a mis-fire.
__________________
'95 850 T-5R Wagon - Panther - Daily Driver 22 / 28 mpg
'98 S70 GLT - Lil' Red - Daughter 22/30 mpg
--------------------------------------------
Volvo Repair Videos - Used Parts For Sale - Interior Lights For Sale - ABS Light? Click Here - Men's Mentoring
--------------------------------------------
Volvo's of time past: '87 740 GLE, '79 262C Bertone, '78 264, '95 960, '97 960, '98 S90, '98 S70 GLT, '95 850 T-5R Yellow, '95 960, ,96 850 R...
Reply With Quote
  #7  
Old 09-04-2010, 06:36 PM
Junior Member
 
Join Date: Aug 2010
Location: Portland, Oregon
Posts: 5
Default

Thanks for all the ideas. I'll try the spark wires first and let you know what the result is. I've also noticed that it gets shakier in Drive and Reverse than in Park or Neutral.
Reply With Quote
  #8  
Old 09-04-2010, 09:32 PM
Junior Member
 
Join Date: Aug 2010
Location: Portland, Oregon
Posts: 5
Default

Well, the spark wires were fine. I went and cleaned the IAC where the tubing goes in, as it was caked with gunk, started the car up, and the idle is much less rough. Overall the car is idling a little faster in park and in drive but the engine isn't shaking nearly as much.
Reply With Quote
  #9  
Old 09-04-2010, 10:30 PM
swiftjustice44's Avatar
Super Moderator
1973 Volvo 142
My Garage
 
Join Date: Aug 2008
Location: Dallas, TX
Posts: 2,812
Default

So...have any of these guys looked at the harmonic balancer? Used to be called a crank pulley when they were solid metal. Now, two concentric rings of steel insulated with rubber. With age, the rubber splits, cracks, causes vibration and at higher speeds the motor's timing can be way off. That might be causing the overheating. More likely it is a clogged radiator. An IR heat gun is a great way to check for a clogged radiator...you can use your hand if you're careful...basically looking for areas of the radiator that remain cool...those are clogged areas. I'm a little concerned about the mechanic that increased your idle. Technically, the idle is set solely by the ecu. I suspect he screwed (literally) with the throttle stop which will increase the idle speed but throws the TPS out of whack unless he adjusted it too. Some of these old timers don't understand FI and some of the younger guys don't understand Volvos...just saying...
Reply With Quote
  #10  
Old 09-04-2010, 11:25 PM
Junior Member
 
Join Date: Aug 2010
Location: Portland, Oregon
Posts: 5
Default

I don't believe anyone has looked at the harmonic balancer. I'll try the radiator test tomorrow to see what I find. The temp gauge hasn't gone high for a few weeks and I primarily noticed it when I was on the highway. As for the shaking/IAC, it is better but I'm getting code 144. From what I've read around here and other places it may be related to fuel pump relay, as I've had a recent string of stalls. A few minutes later it will start right up again. It's just odd because I didn't have the code until I cleaned and reinstalled the IAC. The idle is quite fast now and I can hear the fuel pump freaking out in the back.

Yeah, the mechanic I've been going to has been doing Volvos for 20+ years but I'm pretty sure he did screw with the screw. I think I may have bought one of those cars where it's either cut losses now or continue to track and fix problems and the continue to arise. One thing seems to be leading to another. It's too bad because I've been wanting a 240 for my whole life and it's been a total disappointment to this point.

Thanks for your help!
Reply With Quote
Old 09-04-2010, 11:25 PM
 
 
 
Reply

Tags
240, cylinder, engine, example, firing, idle, mechanic, or, oregon, resumehtm, sample, shake, v40, vibration, volvo


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising
Featured Sponsors
Vendor Directory
Our Sponsors

All times are GMT -5. The time now is 05:58 PM.
© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.
Secure Backup