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.

1G 1g misfiring/sputtering under load

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

onefast2gdsm

15+ Year Contributor
866
6
Aug 30, 2010
millersburg, Pennsylvania
92 talon awd, 2g blackbox, 2g maf, holset hx35, 7bolt engine.

The car idles great, no problems there. When i rev it in neutral im getting a slight misfire around 2k rpms. When i put it in gear and let the clutch out it goes crazy and misfires bad until it goes over 2k rpm then it smooths out. I was having a cel for ignition control module and ignition coil so i replaced the coil pack and power transistor and the codes havent reappeared. So far i replaced and checked:

Mechanical timing verified
Ignition timing set properly
Replaced spark plugs gapped at .20
Replaced ignition coilpacks
Replaced power transistor
Plug wires are ngk and i checked them over they appear to be fine.
Swapped injectors
Fuel pressure is 42 psi at idle.

The fuel filter looks pretty old so i might change that tomorrow. Im running out of ideas.
 
Had similar symptoms and my NGK wires turned out to be junk and only 8 months old. They were cross talking and grounding. I put some plain old Ebay junkers on and it all went away. Just my experience that I just fixed after changing everything also. I had been fighting it for quite awhile. Either ohm your wires for resistance or replace, which ever fits your pocket book. I just happened to have some spares laying around.
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Latest posts

Build Thread Updates

Latest Classifieds

  • For sale Misc Left Over Parts
    Hello, I have a few left over parts for sale, these do not include shipping, please pm me for a...
    • r3dmak
    • Updated:
    • Expires
  • For sale Alpha Injection Clinic 2200cc for 4G63 DSM/EVO
    I have a set of Alpha Injection Clinic 2200cc high z injectors for DSM/EVO. I am stepping up to...
    • spoolinpos
    • Updated:
    • Expires
  • Wanted WTB 2g half rad
    ISO of a 2g koyo half rad or something equivalent.
    • Michael Wucher
    • Updated:
    • Expires
  • For sale Coilover Springs
    Used pair of Eibach coilover springs from an old set of Ground Control coilovers. 2.5" inner...
    • RamenPride
    • Updated:
    • Expires
  • For sale 4G63 Mitsubishi logo early valve cover
    Early Mitsubishi logo valvecover. “1990” All threaded holes are good. Has the 90 style vent...
    • Galant665
    • Updated:
Back
Top