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 STM Tuned
Please Support Morrison Fabrication

Unknown part of blow off system

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.

dgarnett02

Probationary Member
21
2
Mar 20, 2019
Stacy, Minnesota
You must be logged in to view this image or video.
You must be logged in to view this image or video.
Hello everyone,
Today I was working on my intake when I came across this little thing. I have no clue what it is. If someone could please tell me what this is/does that would be great, thanks.
 
@dgarnett02
Off the topic but you should disconnect the negative terminal of the battery. It is really dangerous. You could cause a massive short.
Looks disconnected to me? Terminal end is far closer to the center of the battery than the post.
 
Looks disconnected to me? Terminal end is far closer to the center of the battery than the post.
True, I didn't see it very well. But it is still too close to the terminal. Last year a customer of mine just burnt the engine bay of his spyder when he was cleaning the throttle body. According to him, he surely disconnected the both terminals but when he sprayed carbuclean to the throttle body he saw a spark from the spray can and the spray blew fire.
 
True, I didn't see it very well. But it is still too close to the terminal. Last year a customer of mine just burnt the engine bay of his spyder when he was cleaning the throttle body. According to him, he surely disconnected the both terminals but when he sprayed carbuclean to the throttle body he saw a spark from the spray can and the spray blew fire.

I believe it! Had crazier from my subordinate :rolleyes:

To contribute, I do agree that you shouldn't have anything tee'd into the bov line, seems like an older job done back when the general pop didn't know better (do they now?)
 
True, I didn't see it very well. But it is still too close to the terminal. Last year a customer of mine just burnt the engine bay of his spyder when he was cleaning the throttle body. According to him, he surely disconnected the both terminals but when he sprayed carbuclean to the throttle body he saw a spark from the spray can and the spray blew fire.
Thanks for the concern, I do disconnect the battery. I’ll take better steps like putting a rag around the negative terminal from now on.
 
That's an oldschool manual boost controler. Your manual boost controller, nor anything else should be on your BOV vacuum source. You should move that elsewhere.
I found a major vacuum leak yesterday behind the throttle body. A line should be connected from that to the bov from what I’ve seen. I just don’t know where to run everything. If I run the a line from that leak to the bov either the solenoid or the waste gate actuator won’t have a line anymore.
 
I found a major vacuum leak yesterday behind the throttle body. A line should be connected from that to the bov from what I’ve seen. I just don’t know where to run everything. If I run the a line from that leak to the bov either the solenoid or the waste gate actuator won’t have a line anymore.

The BOV should be run from a port on the front of the intake manifold itself, not the throttle body. Not sure what is leaking behind it, you'd have to take a picture. Probably remnants of the emission system--the EGR system or purge control valve.

Unfortunately, you'll need to find another vacuum/pressure source for your BOV and wastegate systems, but the nipples on the throttle body are not a good selection for this. Neither system should have anything else tapped in or it could cause those systems to function incorrectly--both are critical systems, BOV protects the turbo for surge, and the wastegate regulates boost. I'd run the BOV from the factory intake manifold nipple alone, and I'd add a hose barb to a lower intercooler pipe close to the compressor outlet for the wastegate.
 
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