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.

2G Misfires and Idle surge. Tried everything.

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

Andrew_99_GST

Proven Member
119
12
Oct 18, 2014
Omaha, Nebraska
Let's start with the first problem
Misfires-
I've had misfires ever since I got the car. I rarely get a code, but the 2 times I have, I got 0300 and 0302. I can feel it at idle and then when accelerating.
Idle Surge-
I had idle surge for quite a while. I don't remember what I did, but I tried a bunch of different stuff and got it fixed. I then was getting a surge under light throttle. Fixed that by simulating idle switch in dsmlink. Today, after rebuilding my throttle body and boost leak testing, I start it up, and it idled really high. The Idle kept climbing and climbing. I tapped the accelerator and the idle dropped down, and surged like crazy. The only other idle thing I did, was one of the valves on top of the throttle body was boost leaking. So I put a new cap on it and fixed the leak there.



What I've tried-
3 different spark plugs
New wires
New coil packs
Boost leak test (leak free)
Rebuilt Throttle Body since I had a leak there
New IAC
New BISS O RING

And here's a log from today after warming up-
 

Attachments

You must be registered for see attachments list
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