The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support ExtremePSI
Please Support STM Tuned

2G No spark on 1 and 4

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

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

johnmel

10+ Year Contributor
319
2
Mar 10, 2012
Levittown, Pennsylvania
Okay so i am at a lost right now i can not get any spark to cylinder 1 and 4 and i a need help with this, What i have done to try and fix the problem is changed the coil packs also checked with ohm meter and it gets one fire cycle on the wires so they are good, Power transistor (3 times), Cam angle sensor was broken so i replaced that, MPI/MFI resistors are good. and i tried a different ECU and nothing has changed. Is there something im missing any help would be great.
 
There is one possibility.

There is a wire that runs from the transistor to a one way connector on the passenger firewall and returns back to the 1&4 coil as a different color.

(I have thought about why it is this way for hours and still haven't come up with a conclusion other than diagnostics on the factory line)

I did a wire tuck and snipped this connector. Low and behold no spark on 1&4. You can jump the wires from the transistor to the coil pack with an extra wire to get around this connector. Do a search and you'll find what colors to look for, otherwise if you can wait a day I can take a look at mine.
 
There is one possibility.
There is a wire that runs from the transistor to a one way connector on the passenger firewall and returns back to the 1&4 coil as a different color.

(I have thought about why it is this way for hours and still haven't come up with a conclusion other than diagnostics on the factory line)
On a 2g turbo: that wire is black-white (white may be faded to yellow) from PT to the Engine Speed Detection Connector (1 pin) on the firewall and then changes to a blue-red from that connector to the 1-4 coil primary. Yes this connection is necessary for the 1-4 coil to work.

Other missing spark possibilities: http://www.dsmtuners.com/threads/st...ont-start-merged.437574/page-2#post-151265626.
 
Last edited:
Ok so the wire on the transistor is the farthest left Black with white stripe and jumps to the blue with red stripe on the coil pigtail. Take a look at the pics for reference.

I had to cut into my harness to get these so you're welcome! :D
You must be logged in to view this image or video.


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


I advise to solder them, mine wouldn't hold solder even with a good cleaning and flux. Hence the butt connectors.
 
Well thank you guys so much for this im going to try everything this has been a year long battle some of things i have already tried but this is new to me so im going to give it a shot on Monday if it works ill let you know
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top