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.

Weird misfire problem

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

Clutch450

10+ Year Contributor
252
1
Jan 15, 2009
Lancaster, Pennsylvania
I've owned this car for 4 months now with no problems. But today I went to the store. The car ran great there. Then after 10 minutes in the store I come out to start it. It starts but starting it seems like the motor kicks back. Like starter is struggling.
Once it's started it idles rough. And misfires. When trying to drive its like driving on 3 cylinders and backfires bad

I shut it off and start it a few more times. Runs perfect again.
Same situation occurred when I got home and go to start it a few minutes later

No CEL's. Changed plug wires and power transistor and checked plugs. But the problem still occurs

Car is a 2.4 block run by dsmlink v3
It's been raining a lot here recently, not sure if driving it in the rain for the first time today has an effect on it or not.

Any helped would be great!
 
It shows good compression across all 4, 160+ psi

I pulled the fuel filter today and sprayed a little brake cleaner in it and this is what I was getting out of both inlet and outlet sides of the filter
Time for a new one right?

You must be logged in to view this image or video.
 

Attachments

You must be registered for see attachments list
yeah, def if you are running e85 and 2150's, go with a summit filter and i would pull the fuel pump and check your fuel sock as well. could have gotten bad gas at one point and now its working all its shit through your fuel system... i pulled my fuel pump after getting bad gas and the sock was almost black.

and now im pulling my car apart on a fuel hunt... at WOT i lose all fuel pressure and the car falls flat on its face, only under load though... damn these cars when they run like this...
 
Do you have a stock fpr in it?

Update on my situation: I found out I have a paper element filter in my fuel lab filter. E85 and paper filters don't mix. So I replaced it with a stainless micro one.
Problem still exists. Only can be badly clogged injectors. So they are getting cleaned thoroughly today by a shop. I'm praying this fixes it!

Installed the cleaned injectors and problem still occurs.
I have fuel, spark, compression
I don't know what else it could be

Heres a log of the idle
 

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

Build Thread Updates

Latest Classifieds

Back
Top