The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners

  • Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

Please Support STM Tuned
Please Support Southbay Fuel Injectors

420a Eclipse RS running away


Probationary Member
Aug 13, 2013
Chico, California
Just reassembled a 420a in Eclipse RS, and the engine runs away, any ideas? All the vacuum lines are plugged in correctly. I have to turn off the car before it blows the engine, went up to like 3500 RPM in like 10 seconds.

Thanks in advance.


Proven Member
Aug 3, 2013
Clearlake, California
My car was getting stuck in wot.. I followed my accelerator cable to this metal bracket that was bolted to the tb... Thecable went thru the bracket and to the tb... Inside of this round cable holding bracket is a little plastic guide that had come out and was being wedged between throttle and bracket causing it to get stuck in wot... Pushed the plastic cable guide back in and bent the bracket just a little to keep it in...
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing Raven Fabrication RixRacing RockAuto RTM Racing SouthBay Fuel Injectors STM Tuned VR Speed Factory

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds