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.

Fuel Cut/High Idle, Coinciding Problems?

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

habitatguy187

15+ Year Contributor
3,648
262
Aug 20, 2008
Indianapolis, Indiana
I just bought a 92 talon turbo fwd with no mods done to it. This is my first dsm project car. From what I can tell by the vehicle history all the cars previous owners were women, hence the car still being bone-stock. But, here's my problem, when I'm idling the car runs at about 1350 rpms. I've read some stuff on this about there being too much air and such and such. But also when I punch it I get fuel cut around 5500 rpms (and yes i'm sure it's fuel cut). Now from what i gathered fuel cut is caused by the ecu reading too much air, and high idle is caused by the ecu reading too much air, so could both these problems be from the same source? If so I don't know what to fix or how to diagnose. It suprised me when I got fuel cut because I only thought modded cars experienced that problem, so I naturally associated it with my high idle speed. Thanks for any help guys. And please don't send me a link to a thread with 500 posts on it. Thanks again.
PS. I haven't had any check engine lights.
 
ok, this goes to show how much of a noob I am. I did a boost leak test and found a leak where the hose goes into the IC. Tightened that hose down so hard that it'll probably never come off and, voila! No leak. But I still had a high idle and idle surge at times, so today I read about BISS screws, went out to my car to look at mine, and it didn't even have the cap on it, so I screwed that down and, voila! again. Idle prob. is fixed, took the car on a short drive and no idle surge. The truth is there probably isn't a need for any new threads to be made, it's just that ppl like me are lazy and don't want to take the time to look. Anyway, that's all.
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

  • For sale 4G63 3 inch Magnaflow SS high flow cat
    3 inch Magnaflow stainless cat. High flow. 18.25 inches. Flange holes are 4 1/8 center. Has...
    • Galant665
    • Updated:
  • For sale 4G63 Forge Motorsports BOV
    Original Forge Motorsports bov. Adjustable with over 80 clicks on the dial. Nice to use for...
    • Galant665
    • Updated:
  • Wanted 1g 1991 Black Cherry Eagle Talon
    5-speed
    • bamatalon
    • Updated:
    • Expires
  • 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
Back
Top