StreetStangs.net  

Go Back   StreetStangs.net > Technical > Mod Motor Tech (4.6 & 5.4)

Reply
 
Thread Tools Display Modes
Old 06-14-2005, 06:03 PM   #1
5.0blackbrd
Junior Member
 
5.0blackbrd's Avatar
 
Join Date: Apr 2005
Posts: 26
Small problem

My '94 Lincoln with the DOHC 4.6 will hardly run first thing in the morning. It idles rough and when I put it in gear it bucks and sputters and you have to really mash on the gas to get it to move. Once it gets moving it drives fine and never does it again all day. Only does it first thing in the morning. Any ideas?

Mike Donley
__________________
Mike Donley
1991 Ford Thunderbird LX/5.0
1994 Lincoln MarkVIII
5.0blackbrd is offline   Reply With Quote
Old 06-14-2005, 07:22 PM   #2
Wall96cobra
ooooo cake!!!
 
Wall96cobra's Avatar
 
Join Date: Dec 2004
Location: Saks, AL
Posts: 1,630
Re: Small problem

Well it kinda sounds like a vacuum leak or possibly the IMRC's are stuck open. I've really never heard of the IMRC's sticking in the open position but it is possible. Have you tried cleaning your maf?
Wall96cobra is offline   Reply With Quote
Old 06-14-2005, 08:12 PM   #3
5.0blackbrd
Junior Member
 
5.0blackbrd's Avatar
 
Join Date: Apr 2005
Posts: 26
Re: Small problem

Quote:
Originally Posted by Wall96cobra
Well it kinda sounds like a vacuum leak or possibly the IMRC's are stuck open. I've really never heard of the IMRC's sticking in the open position but it is possible. Have you tried cleaning your maf?
Not yet. I have some electronics cleaner but it is for cleaning volume knobs and rotary switches, so it has lubricants in it. I have to get some non-residue type.

I ran some Seafoam through the engine a few weeks ago. Do you think another can would be good as well?

Mike Donley
__________________
Mike Donley
1991 Ford Thunderbird LX/5.0
1994 Lincoln MarkVIII
5.0blackbrd is offline   Reply With Quote
Old 06-14-2005, 08:16 PM   #4
Wall96cobra
ooooo cake!!!
 
Wall96cobra's Avatar
 
Join Date: Dec 2004
Location: Saks, AL
Posts: 1,630
Re: Small problem

I guess it couldn't hurt to run another can through. Can you feel your IMRC's open when the car is cold? I know when I first take off in my car I can feel the carslightly bog when the IMRC's open, wasn't sure if it was the same in your car.
Wall96cobra is offline   Reply With Quote
Old 06-14-2005, 08:23 PM   #5
5.0blackbrd
Junior Member
 
5.0blackbrd's Avatar
 
Join Date: Apr 2005
Posts: 26
Re: Small problem

Quote:
Originally Posted by Wall96cobra
I guess it couldn't hurt to run another can through. Can you feel your IMRC's open when the car is cold? I know when I first take off in my car I can feel the carslightly bog when the IMRC's open, wasn't sure if it was the same in your car.
Is there a way to check the movement of the IMRC's manually? Can you move them by hand? I don't know too much about the 4.6 yet.

Mike Donley
__________________
Mike Donley
1991 Ford Thunderbird LX/5.0
1994 Lincoln MarkVIII
5.0blackbrd is offline   Reply With Quote
Old 06-14-2005, 08:40 PM   #6
Wall96cobra
ooooo cake!!!
 
Wall96cobra's Avatar
 
Join Date: Dec 2004
Location: Saks, AL
Posts: 1,630
Re: Small problem

Well my car has an electric motor that opens the IMRC's so I can just rev the car to 3200rpm and feel the cables at the back of the intake open the IMRC's. I think your is vacuum operated so I'm not sure at what RPM or vacuum they open at but you should be able to see or atleast feel where the cables are at the back of the intake, then try reving the car up to see if they move.
Wall96cobra is offline   Reply With Quote
Old 06-14-2005, 08:44 PM   #7
5.0blackbrd
Junior Member
 
5.0blackbrd's Avatar
 
Join Date: Apr 2005
Posts: 26
Re: Small problem

Quote:
Originally Posted by Wall96cobra
Well my car has an electric motor that opens the IMRC's so I can just rev the car to 3200rpm and feel the cables at the back of the intake open the IMRC's. I think your is vacuum operated so I'm not sure at what RPM or vacuum they open at but you should be able to see or atleast feel where the cables are at the back of the intake, then try reving the car up to see if they move.
Thanks Wall, I will try that tomorrow.

Mike Donley
__________________
Mike Donley
1991 Ford Thunderbird LX/5.0
1994 Lincoln MarkVIII
5.0blackbrd is offline   Reply With Quote
Old 06-14-2005, 09:50 PM   #8
banditmwp
Welcome to America!
 
banditmwp's Avatar
 
Join Date: Dec 2004
Location: in the 11's
Posts: 4,501
Send a message via AIM to banditmwp Send a message via Yahoo to banditmwp
Re: Small problem

Possible IAC?
__________________

91 GT Convertible

2006 Nissan Titan LE Crew Cab
2014 Peterbilt 337/Marion 22' box
banditmwp is offline   Reply With Quote
Old 06-15-2005, 04:16 PM   #9
hevymtl
Beach Bum
 
hevymtl's Avatar
 
Join Date: Dec 2004
Location: In the sun!
Posts: 2,846
Re: Small problem

Quote:
Originally Posted by banditmwp
Possible IAC?


hevymtl is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -6. The time now is 06:35 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.