Results 1 to 4 of 4

Thread: Roadblock of electrical issues

  1. #1
    Mitsu booster
    Join Date
    May 2016
    Location
    Brighton MI
    Posts
    46

    Roadblock of electrical issues

    Setup is: 2.2, JE pistons, T2 rods, ARP hardware throughout, Ported G head, ported one piece intake. AEM 400 LPH fuel pump, -6 line throughout, Delphi Low imp. 95 lb injectors, accufab regulator, Holset HX35 turbo, 3" exhaust. SMEC electronics.


    Just curious. For those running an ostrich, or whoever has ever had any problems with one, what kinda symptoms did you have? starting to run out of possible solutions. It’s not ignition or cam timing (verified this on Saturday and Sunday) even took the crank damper off to verify marks. swapped plugs,swapped coils, have my ground strap on the intake to the strut tower, have a second ground from strut tower to the fuel rail itself (on top of injector ground). I’m pretty
    convinced it’s NOT the calibration. As I’ve tried a few different combinations of things and the problems are the same with help from a couple guys. Plugs also look like they are burning evenly. The power loss light def seems to come and go aswell, but kinda seems like it would go hand in hand with the other symptoms, ONLY codes I have are 31 and 36, both of which are irrelevant. Coil + and - both have less than 0.1 of resistance from the small connector on the SMEC. had this exact SMEC and Ostrich setup in my van last year and didn’t have any issues, (different engine combo setup but electronics all the same). Swapped a power board from another SMEC and no change. I don’t have another socketed SMEC or I would try that, TPS sweep on scanner shows 0.64v to 3.67v at WOT. Used a mighty vac to pressurize map sensor and at 28 psi it’s at 4.96v. Voltage goes up evenly. Fuel pressure rises with increase in vacuum leading into boost, (but won’t get into any boost before breaking up) Cylinder compression test got 125 across all four. Went over all my vacuum lines, which is very few, just the main feed to a vacuum block and the block only splits between the map sensor and FPR. haven’t pulled the valve cover to check camshaft, but figured that would show other more obvious symptoms. Have PT lifters installed also. Don’t want to drive it much more in fear of any engine damage. Anyone seen similar symptoms and if so what would be the best direction to take?

    Thanks in advance!

  2. #2
    Mitsu booster
    Join Date
    May 2016
    Location
    Brighton MI
    Posts
    46

    Re: Roadblock of electrical issues


  3. #3
    Supporting Member II Turbo Mopar Contributor A.J.'s Avatar
    Join Date
    Feb 2006
    Location
    Mesa, AZ
    Posts
    2,427

    Re: Roadblock of electrical issues

    I had a problem with my 2.5 turbo Caravan running an Ostrich. My problem was over 5 psi of boost it would start bucking and if I stayed in the throttle it would stall. Worked fine with a burned chip in a remote socket. Since I couldn't figure it out I couldn't continue forward with my SRT4 swap so I decided to upgrade my one piece intake intake to a two piece and the stock exhaust manifold to TU's cast header. For sh!ts and giggles I tried my ostrich again and it worked, no more bucking or stalling. I was able to tune again so I was able to move forward with my SRT4 swap. The only thing I can think of is, I drilled and tapped two extra ports on my one piece intake (on the passenger side end above the big freeze plug) and that's where my MAP got it's air signal from. It was so odd that replacing mechanical parts fixed what seemed like an electrical problem.

  4. #4
    Mitsu booster
    Join Date
    May 2016
    Location
    Brighton MI
    Posts
    46

    Re: Roadblock of electrical issues

    Quote Originally Posted by A.J. View Post
    I had a problem with my 2.5 turbo Caravan running an Ostrich. My problem was over 5 psi of boost it would start bucking and if I stayed in the throttle it would stall. Worked fine with a burned chip in a remote socket. Since I couldn't figure it out I couldn't continue forward with my SRT4 swap so I decided to upgrade my one piece intake intake to a two piece and the stock exhaust manifold to TU's cast header. For sh!ts and giggles I tried my ostrich again and it worked, no more bucking or stalling. I was able to tune again so I was able to move forward with my SRT4 swap. The only thing I can think of is, I drilled and tapped two extra ports on my one piece intake (on the passenger side end above the big freeze plug) and that's where my MAP got it's air signal from. It was so odd that replacing mechanical parts fixed what seemed like an electrical problem.
    Interesting, so throughout the week I went ahead and checked all the grounds again, and tried a different calibration, and whats funny is I can't build over 5 psi of boost, (also have it set to this minimum on the MBC) and around 45-5k RPM is where it cuts out... AFR is good 11.5-11.7 but ONLY does this at WOT, if I somewhat ease into it, I can get it to clear the 5k mark. IF I stay out of boost itll go past the 5k rpm no problem. It also still seems to have a "misfire" without minimal load on the engine, say below 3k rpm in 2nd or 3rd gear cruising. AFR is fine still 14.2-15.0 cruising with that misfire. I monitored knock activity and retard and when it breaks up it shows nothing, so I feel as if its definitely spark related, in some way or another.

Similar Threads

  1. 1988 Daytona Shelby Z electrical issues
    By 2POINT5TURBO in forum Electrical & Fuel System
    Replies: 3
    Last Post: 06-01-2018, 06:51 PM
  2. Electrical issues.
    By rx2mazda in forum "I need help!"
    Replies: 15
    Last Post: 07-09-2015, 01:44 PM
  3. Guage cluster electrical issues.
    By Stinkbox in forum "I need help!"
    Replies: 2
    Last Post: 05-31-2011, 03:00 PM
  4. Electrical issues 89 lebaron vert
    By turbo-baron in forum Electrical & Fuel System
    Replies: 0
    Last Post: 05-02-2011, 10:30 PM
  5. Electrical issues, wont start
    By 1966 dart wagon in forum "I need help!"
    Replies: 2
    Last Post: 06-24-2008, 06:42 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •