Go Back   EcoModder Forum > EcoModding > DIY / How-to
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-30-2008, 11:09 PM   #1 (permalink)
lyd
It smells funny in here.
 
Join Date: Sep 2008
Location: Southern Wisconsin
Posts: 63

GeeOh - '97 Geo Metro Base
90 day: 33.41 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Plug wires, rotor and cap. Does it matter much?

I want to replace my plug wires while I am in there monkeying around with the EGR. Every now and then it starts a little hard in the wet, so I think it needs them. Any particular recommendations in that regard, or is whatever the Autozone hands me sufficient?

While we're on the subject, I am a little uncertain about the procedure for setting base timing. I get the bit about jumping the ECU, although I am uncertain about what the amperage of the fuse on the jumper should be. Beyond that, it is all a little hazy.

Do I need an inductive timing light, or will the old style work? When you guys talk about advancing timing to +4, +6, etc, are you reading that at idle? When you do advance the base timing, what keeps the ecu from retarding it right back again to where it thinks it should be?

Maybe my first question should have been, is there a good writeup of all this out there already? If so, all I need is a pointer.

Thanks a lot.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-30-2008, 11:44 PM   #2 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
The autozone stuff seems to work for me. Just keep the receipt in a memorable place on "lifetime warranty" stuff in case it comes time to replace them again.

Plug gapping is important, otherwise, they make a spark and the gas goes boom -- so I'm not picky there.

I timed by ear and it bumped FE a bit (maxed out the advance). There's some ping at full load at high IATs, but those moments are rare. Basically advance at idle until you hear knocking, and back it off a bit (fully warm engine, ECU bypassed).

RH77
__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Old 10-02-2008, 07:24 AM   #3 (permalink)
lyd
It smells funny in here.
 
Join Date: Sep 2008
Location: Southern Wisconsin
Posts: 63

GeeOh - '97 Geo Metro Base
90 day: 33.41 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Local parts store wanted $20 just for the cap. Wires and rotor were cheap.

Thinking of ordering this wires/rotor/cap kit from rock auto, $27.
"UNITED IGNITION WIRE Part # 17302 More Info {Includes Distributor Cap & Rotor, and PREMIUM Packard/Delphi Silicone Spark Plug Wires}"


Any reason not to go with this?

Regarding the timing, I still don't understand what keeps the ECU from retarding the timing back to where the ECU wants it to be, even if you advance the base.
  Reply With Quote
Old 10-02-2008, 12:10 PM   #4 (permalink)
Master EcoModder
 
Join Date: Jul 2008
Location: Silly-Con Valley
Posts: 1,417
Thanks: 173
Thanked 226 Times in 174 Posts
Quote:
Originally Posted by lyd View Post
Regarding the timing, I still don't understand what keeps the ECU from retarding the timing back to where the ECU wants it to be, even if you advance the base.
Probably because the ECU does not actually know when the ignition timing is. It simply advances or retards it from the current static timing.

-soD
  Reply With Quote
Old 10-02-2008, 02:51 PM   #5 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
Quote:
Originally Posted by some_other_dave View Post
Probably because the ECU does not actually know when the ignition timing is. It simply advances or retards it from the current static timing.

-soD
Inside the distributor, there are a few extra wires that detect and regulate the spark. It's traditionally connected to the spark pack or ignition source with a feedback wire to the ECU. The "timing" can be interrupted electronically from the ECU vs. the physical point of electrification as the distrib spins and connects with the points. This produces the "timing range".

Which is why you should tune ECU-independent. After that, the range of advance/retard is limited electronically.

RH77
__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Old 10-14-2008, 05:41 PM   #6 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: CO
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the help.
__________________
Soapstone is very eco-friendly.
  Reply With Quote
Old 10-14-2008, 09:41 PM   #7 (permalink)
Hi-Tech Redneck
 
Johnny Mullet's Avatar
 
Join Date: May 2008
Location: Ashtabula, Ohio
Posts: 1,436
Thanks: 6
Thanked 48 Times in 41 Posts
Send a message via AIM to Johnny Mullet Send a message via MSN to Johnny Mullet
I bought the cap, rotor, plugs, and wires from Autozone. I chose to use the standard NGK plugs since these Suzuki engines seem to run better on them than anything else.

__________________

GeoMetroforum.com - got mpg?
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com