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.

Post a Question

420A Miss fire and power cut issue above 70

Please Support STM Tuned

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

2g_rebel

Probationary Member
10
0
Jan 21, 2026
Seville, Ohio
1 have a 99 eclipse just rebuilt motor 175 across the board on compression. Timing is on point. I have new coil pack new fuel pressure regulator set at 43 base pressure. 12.1 fmu stock ECU and injectors and fuel pump. Seems like when trying to hold a speed it gets a miss. And back roads it drives fine. Under 60. Runs fine when doing pull just seems a little under power for turbo and I had before rebuild
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!

Similar threads

20g ar.70 turbo ?
Replies
17
Views
8K
92awddsm
92awddsm
BigRand
compression and fuel cut off question?
Replies
1
Views
676
SilverEclipseT
  • Locked
what i miss
Replies
4
Views
749
Defiant
Defiant
fuel for the fire...big fire i hope.
Replies
1
Views
650
GSGoinFast
missing link, still fuel cut.....???
Replies
4
Views
1K
GSGoinFast
Boosted Fabrication
ECM Tuning
ExtremePSI
FIBA Motorsport
Fuel Injector Clinic
Innovation Products
Jacks Transmissions
JNZ Tuning
Kiggly Racing
Morrison Fabrications
Rix Racing
RockAuto
STM Tuned
Support Vendors who Support the DSM Community

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top