The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

Help....Is my ECU good?

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

TurboBlue

20+ Year Contributor
654
0
Oct 25, 2002
Canton, Connecticut
well to make a long story short, i just rebuilt my entire motor and the car has been running for about a week, driving about 2 days.

I got my hands on an EPROM ECU from a buddy of mine, as far as he knows, its good. Well i really want to order a DSM Chip to compensate for my 650's and just because everything i hear about them is great, the cars always idle and drive awesome under part throttle.

But anyways, tonight i just plugged in the ECU and the car started, although i havent driven with that ECU in my car yet. Is the fact that the car started and ran enough to say that the ECU is good, or do i really need to drive on it first?

PS, i dont wanna test the ECU under boost because i have about 50 miles on the new engine, and running on 650's unfortunately (cant get lower injector seals for the 450's) Im very afraid that im running rich and dont wanna wash things out.

I've been playing with the SAFC for a day or too and my low trims are at about 90%, med at about 112% and high at about 102%

Any help would be appreciated, thanks, sorry for the long post
 
If it starts and runs fine at idle then it should be more than good to go once you add Jeff's chip. I'm in the same boat as you (waiting for my 550 chip to arrive) and I second your idea not to drive it pig rich and wash down the oil. If you've never put in a chip before, Jeff will let you know which way the notch should face or I can take a snap of mine tomorrow when I pull it for the install.

Hope that helps!

Andy
 
I keep forgetting you have a 1G so let me add that it would be a great idea to check all of your caps and make sure you don't have any leaking.
 
would you be interested in socketing and checking my ECU for me? Once i get the chip and the socket i could send you the parts, and i'll buy the caps if you need me too, or if you have them you can just charge me for them...let me know, thanks
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Latest Classifieds

  • For sale 2g 2G Mishimoto Radiator & Fan Shroud
    2G Mishimoto Radiator & Fan Shroud $200 + shipping and paypal feesYou must be registered to...
    • jersygsx
    • Updated:
    • Expires
  • For sale 2g 2G Power Window Switches ( tested and hardware included )
    2G Power Window Switches $55 + shipping and paypal fees* Tested 6/2/26 * Hardware included *...
    • jersygsx
    • Updated:
    • Expires
  • For sale VIRGIN 4G63 6-BOLT TURBO HEAD
    Came off a virgin stock AWD Auto 1G DMS (91), also have matching block and crank which are also...
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale 1G DSM 4G63 6-BOLT TIMING COVER
    Used, see condition in photos. Buyer covers shipping / fees.
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale Garage clean out
    Changing setups on the car and getting rid of some stuff as well that's been laying around. Will...
    • 92GSXtacy
    • Updated:
    • Expires
Back
Top