Rough Idle - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 15 (permalink) Old 08-19-2014, 03:45 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Rough Idle

Does the 3.8l engine display rough idle if the plug wires are in need of replacement like the 4.6l engine does?

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 08-19-2014, 10:56 PM
Kind of slapped together
 
Join Date: Jan 2010
Location: Bossier City, LA
Age: 63
Posts: 4,853
Almost ALL cars with plug wires will display rough idle if the wires are in need of replacement badly enough.

RwP

Fuelly
RalphP is offline  
post #3 of 15 (permalink) Old 08-19-2014, 11:36 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Quote:
Originally Posted by RalphP View Post
Almost ALL cars with plug wires will display rough idle if the wires are in need of replacement badly enough.

RwP
I started checking and found (I think) I have not replaced the plug wires since 2007. It is probably time.

Thanks.

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
Sponsored Links
Advertisement
 
post #4 of 15 (permalink) Old 08-21-2014, 03:24 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Blew a head gasket last night.

That solves the idle issue.

So what can I get away with NOT having to replace if I replace the head gaskets?

Can I just do the lower intake and head gaskets and not worry about the exhaust gaskets?

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
post #5 of 15 (permalink) Old 08-21-2014, 07:00 PM
Kind of slapped together
 
Join Date: Jan 2010
Location: Bossier City, LA
Age: 63
Posts: 4,853
Possibly, but when you can buy all the gaskets in one set for under $60 (still need the new head bolts / ARP studs - I'd opt for spending for the ARP studs myself!) I think that may be being TOO cheap.

Also, get new bolts/studs for the intake and exhaust manifolds. Even if they're not "Torque to yield" or one-time usage, especially the exhaust manifold bolts/studs will not be in the best of shape due to age.

RwP

Fuelly
RalphP is offline  
post #6 of 15 (permalink) Old 08-22-2014, 08:33 AM
Seasoned PostWhore
 
jco1385's Avatar
 
Join Date: May 2007
Location: Mobile, AL
Posts: 3,744
Garage
If you're doing the head gaskets I would suggest you have the heads checked for flatness at the very least, if not decked .010 and use Fel-Pro MLS gaskets. I bought the Fel-Pro head bolt set as well. The ARP stuff is nice, but not cheap. I also chose to re-use the intake and exhaust bolts. I did wire brush with a bench grinder, and chase all threads (bolts/heads/block). They were in good shape.

1994 Thunderbird - 2000 4.2L M5R2 now has 55k

1995 Thunderbird - 2002 Alum 4.6L SVO - Awaiting transplant... (Parts donor)

1996 Cougar - 2004 3.9L 4R70W
jco1385 is offline  
post #7 of 15 (permalink) Old 08-22-2014, 09:11 AM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Quote:
Originally Posted by jco1385 View Post
If you're doing the head gaskets I would suggest you have the heads checked for flatness at the very least, if not decked .010 and use Fel-Pro MLS gaskets. I bought the Fel-Pro head bolt set as well. The ARP stuff is nice, but not cheap. I also chose to re-use the intake and exhaust bolts. I did wire brush with a bench grinder, and chase all threads (bolts/heads/block). They were in good shape.
A man after my own heart....

I by FELPRO for all my gaskets. Last time I bought an off brand, I was replacing the head gasket a year or so later. I bought the head gaskets and the intake gasket set. I have the rubber valve cover gaskets. I thought about the whole set and weighed out the price and ended up saving about $30. I also bought a set of head bolts because I have never had an issue with the intake or exhaust bolts. Oh wait... I had a bad exhaust bolt once on my Mark and just replaced it. I have yet to see an exhaust gasket go bad on my cars, but if they are really old, I will replace them.

I use RockAuto for my parts since the prices are some of the best. Plus you get the cool frig magnet with a pic of a cool car....

Thanks everyone. I will post some pics.

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
post #8 of 15 (permalink) Old 08-22-2014, 09:25 AM
Seasoned PostWhore
 
jco1385's Avatar
 
Join Date: May 2007
Location: Mobile, AL
Posts: 3,744
Garage
For the record, there's an Advance Auto online discount code (TRT30) to save 30% and pick up in store. This brings their prices in check with Rockauto, minus the shipping and wait. It's worth looking to see if they're available local.

1994 Thunderbird - 2000 4.2L M5R2 now has 55k

1995 Thunderbird - 2002 Alum 4.6L SVO - Awaiting transplant... (Parts donor)

1996 Cougar - 2004 3.9L 4R70W
jco1385 is offline  
post #9 of 15 (permalink) Old 08-23-2014, 10:19 AM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
"If you have a small leak or 4 or 6 cylinder engine pick up BlueDevil Pour-N-Go 16oz head gasket sealer: http://bit.ly/13lCT85. Simply add it to your radiator and your head gasket leak will be sealed as your drive!"

Pour it in and go?....

Maybe if you were trading the car in to a dealer.

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
post #10 of 15 (permalink) Old 08-23-2014, 02:54 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Plugs 3 & 6...



2 & 5 have moisture damage as well.

6 was not even firing.

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
post #11 of 15 (permalink) Old 08-23-2014, 03:13 PM
4th Gear Poster
 
KEVIN8989's Avatar
 
Join Date: Aug 2012
Location: Ca
Posts: 295
Garage
I tried that Blue Devil stuff it worked for me with my old 1997 Altima but the car had so many other problems I had to retire it. I still got like a extra 7,000 miles out of it because of the Blue Devil. Well good luck on the rebuild.
KEVIN8989 is offline  
post #12 of 15 (permalink) Old 08-23-2014, 05:15 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Quote:
Originally Posted by KEVIN8989 View Post
I tried that Blue Devil stuff it worked for me with my old 1997 Altima but the car had so many other problems I had to retire it. I still got like a extra 7,000 miles out of it because of the Blue Devil. Well good luck on the rebuild.
That is good to know!

Well, I replaced the bad plugs, put it all back together and it is running just fine again. I think the head bolts I used just loosened up and are seeping water into some of the cylinders. I may just put the new head bolts and call it a day.

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
post #13 of 15 (permalink) Old 08-26-2014, 03:56 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
According to the service manual, you need to tighten the bolts in stages (see diagram). Since I am replacing the head bolts only and should only do them one at a time, do I follow the steps suggested or just replace the bolt, tighten to max spec and move on the next bolt in sequence?


1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
post #14 of 15 (permalink) Old 08-27-2014, 03:47 PM
Seasoned PostWhore
 
jco1385's Avatar
 
Join Date: May 2007
Location: Mobile, AL
Posts: 3,744
Garage
You need to tighten to 37 ft/lb, loosen, then final torque (11-18 ft/lb or 7-15 ft/lb), then the additional 85-95 (1/4 turn). Do one bolt at a time to keep the clamp pressure on the gasket. The reason for the tighten, then loosen is to stretch the bolt (I believe).

1994 Thunderbird - 2000 4.2L M5R2 now has 55k

1995 Thunderbird - 2002 Alum 4.6L SVO - Awaiting transplant... (Parts donor)

1996 Cougar - 2004 3.9L 4R70W
jco1385 is offline  
post #15 of 15 (permalink) Old 08-27-2014, 04:09 PM Thread Starter
PostWhore
 
white lincoln's Avatar
 
Join Date: Jul 2005
Location: New Mexico
Posts: 1,086
Send a message via MSN to white lincoln
Quote:
Originally Posted by jco1385 View Post
You need to tighten to 37 ft/lb, loosen, then final torque (11-18 ft/lb or 7-15 ft/lb), then the additional 85-95 (1/4 turn). Do one bolt at a time to keep the clamp pressure on the gasket. The reason for the tighten, then loosen is to stretch the bolt (I believe).
Thanks JCO.

1995 Lincoln Town Car Signature Series - 200k!
1994 Mercoury Cougar XR7 - 150k and still going.

I've had too many other cars to mention...
white lincoln is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome