Club Cobra Gas - N Exhaust  

Go Back   Club Cobra > Engine Building, Tuning, and Induction > Fuel Injection & Tuning

MMG Superformance
Nevada Classics
Keith Craft Racing
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
MMG Superformance
MMG Superformance
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
November 2024
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30

Kirkham Motorsports

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 04-08-2009, 06:05 PM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2004
Location: Kansas City, KS
Cobra Make, Engine: jbl
Posts: 2,291
Not Ranked     
Default problems with my efi

ever have one of those moments?

i've had efi problems for about 2-3 weeks now. it's an accel dfi gen 7 setup and runs in sequential mode with crank trigger and cam sync distributor. the problem is a code is set that indicates it has lost the crank signal. when this happens the efi goes from sequential to batch injection, and the tune runs rich, so you can't tune for one and have it work for the other.

i discussed it with the guy i purchased it from and we decided it must be interference, so i rewired all the efi stuff seperately from the power wires and msd and anything high voltage and interference looking, moving all the hardware to the other side of the car.

last week i thought i had it whooped, but the code came back again, so i was going to change to a dual sync distributor since i couldn't find the problem and try it that way.

tonight i was out there tracing all the wires to make sure of everything and still couldn't find anything wrong, so i pull out the voltmeter and start checking stuff and narrow it down to the crank trigger wire.

after going back and forth with an ohm meter and continuity checker i discover one pin in an 8 pin connector was not crimped properly. i could push the probes onto the pins and it would read and so i kept going back and forth and thought it was the wire between the connector but it would check ok. on the last go-around i narrowed it down to the pin which was intermittent and didn't have a good crimp on the wire, the wire slipped right out and was only held in with the rubber o-ring.

about 30 minutes prior to this i was about ready to give somebody big bucks just to find this.

anyway, that was my moment, and it lasted 2 weeks.

actually, 4 wks after i was kicked off the dyno!

Last edited by vector1; 04-08-2009 at 06:34 PM..
Reply With Quote
  #2 (permalink)  
Old 04-08-2009, 08:42 PM
bobcowan's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2007
Location: Colorado Springs, CO
Cobra Make, Engine: Backdraft, supercharged Coyote
Posts: 2,444
Not Ranked     
Default

Don't feel alone. Last year I had an EFI problem. I tore the entire wiring harness apart, swapped out a few ignition components, ets. Spent weeks tracking it down. It turned out to be a faulty connector at the distributer. All it needed was a $2 part from Radio Shack. Sigh. Live and learn.
Reply With Quote
  #3 (permalink)  
Old 04-08-2009, 09:01 PM
PANAVIA's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: San Jose CA, CA
Cobra Make, Engine: SPF_R_/BRG/FRBoss302/327CI/FordEFI/Under_Car_Exh/
Posts: 2,523
Not Ranked     
Default

Most electronic stuff works, and works well. --when SH*@*(@# breaks it is usually something simple like a loose ground, clipped wire, or a van-de-graf-generator placed on your skull.

Steve
__________________
Steve SPF 2734 MK3 / Brock Coupe #54- panavia.com
Reply With Quote
  #4 (permalink)  
Old 04-10-2009, 05:57 PM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2004
Location: Kansas City, KS
Cobra Make, Engine: jbl
Posts: 2,291
Not Ranked     
Default

thought i found the problem. looks like i might be going batch fire on the injectors afterall.
Reply With Quote
  #5 (permalink)  
Old 04-11-2009, 06:39 PM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2004
Location: Kansas City, KS
Cobra Make, Engine: jbl
Posts: 2,291
Not Ranked     
Default

switched the cranktrigger/cam sync to a dual sync dist. and car runs better then ever. must have been something weak about the other triggers, wire too long or not shielded correctly or magnets weak, although tried two different distributors.

this is gettin to be a roller coaster ride.
Reply With Quote
Reply


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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 04:05 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink