Running a bit rough, what to do...
Thread Starter
Racer
Joined: May 2003
Posts: 304
Likes: 1
From: beaverton oregon
Ooops, ignore this post... Hit the wrong key.
Pretty much everything stock, 73000 miles, never done a tune up on it...
She is running a bit rough at idle (550 rpm) Should I....
[Modified by TankerVette, 11:37 AM 4/5/2004]
She is running a bit rough at idle (550 rpm) Should I....
[Modified by TankerVette, 11:37 AM 4/5/2004]
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: Ooops, ignore this post... Hit the wrong key. (TankerVette)
After consulting your profile, I can see you have a 95 A4.
Ok... I would do a complete tuneup.
The stock AC Delco plugs loose their platnum pucks by 50k miles, that effectively increases the gap from .050 to .065!
Yes, they will run like crap.
I suggest NGK Iridium.
Ok... I would do a complete tuneup.
The stock AC Delco plugs loose their platnum pucks by 50k miles, that effectively increases the gap from .050 to .065!
Yes, they will run like crap.
I suggest NGK Iridium.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Ooops, ignore this post... Hit the wrong key. (TankerVette)
If by "full tune up" you are including the distributor be prepared to shell out major money there, and a major headache. You can start with plugs and wires. Stay away from Delco Platinum plugs. Like Bogus said they lose their platinum pucks and then they are just REALLY expensive normal plugs.
For normal plugs you can go with any of the following, cost increases as you go down.
Autolite 106
AC Delco R44LTS
NGK TR55
If you want a fancy plug you can go with any of of the milliion different varieties of Autolite Platinums. NGK sells platinum as well. If you want to get really fancy NGK sells the Iridium plugs too.
Any of these should work just fine. Just remember, avoid Delco Platinum plugs, and avoid the gimmick plugs like Splitfire, Bosch +2, Bosch +4, etc. There's a whole lot of money there for absolutely nothing.
Certainly do plug wires while you're at it. I would highly recommend MSD 8.5 Superconductors. They are a little too big for the stock wire looms but they are excellent wires. They are also now available in black if you don't want the bright red in your engine compartment.
For normal plugs you can go with any of the following, cost increases as you go down.
Autolite 106
AC Delco R44LTS
NGK TR55
If you want a fancy plug you can go with any of of the milliion different varieties of Autolite Platinums. NGK sells platinum as well. If you want to get really fancy NGK sells the Iridium plugs too.
Any of these should work just fine. Just remember, avoid Delco Platinum plugs, and avoid the gimmick plugs like Splitfire, Bosch +2, Bosch +4, etc. There's a whole lot of money there for absolutely nothing.
Certainly do plug wires while you're at it. I would highly recommend MSD 8.5 Superconductors. They are a little too big for the stock wire looms but they are excellent wires. They are also now available in black if you don't want the bright red in your engine compartment.
Drifting
Joined: Jul 2000
Posts: 1,298
Likes: 0
From: Jupiter Sunny Florida
Re: Ooops, ignore this post... Hit the wrong key. (TankerVette)
Plugs couldn't hurt...
Wires may not be nessesary...
The opti-spark is not a maintainance item...
A bad idle is usually not because of an over due tune-up. A bad plug or wire will show up on hard acceleration or high RPM driving.
A gummed up throttle plate will ALWAYS cause idle problems, even stalling.
I would first do a full throttle body service, and clean out the IAC!
I think you will be happy! :thumbs:
Wires may not be nessesary...
The opti-spark is not a maintainance item...
A bad idle is usually not because of an over due tune-up. A bad plug or wire will show up on hard acceleration or high RPM driving.
A gummed up throttle plate will ALWAYS cause idle problems, even stalling.
I would first do a full throttle body service, and clean out the IAC!
I think you will be happy! :thumbs:
Pro
Joined: Feb 2003
Posts: 540
Likes: 1
From: Taunton MA
Re: Ooops, ignore this post... Hit the wrong key. (TankerVette)
if above still isn't helping your car you might want to look into new injectors this was what was wrong in my car now she runs like silk :rofl:
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Re: Ooops, ignore this post... Hit the wrong key. (Q1KSLVR)
I agree mostly with; start with the throttle body/IAC (especially those miles - see picture as to why). Then you could consider Taylor's or Morroso and plugs. I would avoid the stock plug, I changed to the TR55-ix's and really like them (one puck was missing after about 20k on the AC-Delco's where the puck is no one knows.)
Racer
Joined: Oct 2003
Posts: 491
Likes: 1
From: Owasso OK
Re: Ooops, ignore this post... Hit the wrong key. (TankerVette)
just a suggestion....but your oxygen sensors may be clogged. run your car @2000 rpm in park for about two minutes...that will clear the oxygen sensors if they're clogged. :cheers:
