 Weak battery = erratic ignition??, think I solved my problem........ |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| Mueller |
 Jun 15 2005, 12:09 PM
Post
#1
|
|
914 Freak!  Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
 |
History:
Kept getting an ignition related miss during idle and it was worse when I rev'd up the motor.... I started to think it was just due to my plugs being overly fouled from the too rich mixture while tuning the FI. I cleaned the plugs, still had a miss, removed the HyFire CDI from the loop, still had a miss..... During the entire time of trying to tune the motor, i had a 2 year old Optima battery in the car which had hardley any use on it, I also had my batter charger hooked up and turned onto 2amps and sometimes 15amps....still would get a miss I had problems starting the car and cranked the battery charger to 50amps...car started right up and no ignition miss (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/boldblue.gif) Time to go get a new battery............ |
   |
 
|
  |
Replies
| airsix |
Jun 15 2005, 12:45 PM
Post
#2
|
|
I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
Agreeing with James and adding that your tuning screen might even show the actual voltage seen by the ECU. My MIC3 does this - you can see the voltage live on screen. Mine goes nuts if it dips below 10v.
Mike, what are you using for crank possition signal? Watch the rpm on the tuning screen. Is it smooth and accurate or erratic? If it's erratic (noise, bad sensor, bad sensor adjustment) you'll have no end to your problems. BTDT. Switching from a home-brew dizzy sensor to the crank-mounted sensor cured those ills for me. My hair even grew back. -Ben M. |
|
|
|
Posts in this topic
Mueller Weak battery = erratic ignition?? Jun 15 2005, 12:09 PM
lapuwali Low battery voltage will cause all kinds of proble... Jun 15 2005, 12:26 PM airsix Followup: Maybe this is tied to your questions abo... Jun 15 2005, 12:57 PM
Air_Cooled_Nut D-Jet does not compensate for low voltage which is... Jun 15 2005, 02:07 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 4th June 2025 - 04:22 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.