Current Unichip users thread

[JDM Sam]

Post in here if you have still have and running a Unichip.

I want to see who here still has a bucking jerking issue with the Unichip installed.
Normal overboost fuel cut is when it goes over 12 psi past 5000 rpm.

The ones that have a bad harness usually still have this problem even at stock psi boost.
If you still have a jerking/bucking issue only with the Unichip installed and sometimes throws a CEL. You may need this resistor fix.
http://www.*************.com/forum/viewtopic.php?f=9&t=38

 

[dandan2]

me! lol currently not installed because of this issue but i think i may have a leak somewhere! is this something that will be fixed with the tune? its not just a buck i get more of just a complete epic fail when i hit boost!

 

[JDM Sam]

Do you get a CEL when it jerks/bucks.

 

[dandan2]

no! i dont believe so. i had just gotten my wideband intalled and wanted to check my readings with the unichip but it just wouldnt let me hit boost without cutting out!

 

[jmv]

thankfully, after a long while with the unit sent back to unichip, my unichip seems to be working fine. stock boost or high(er) boost, i only go up to about 9 on high boost with my forge wga. I had the bucking problems before i sent it back in to unichip.

Hopefully sometime soon i can get a wideband and take it to you sam to get it tuned...

 

[SleepyMSP]

I've had mine in for a about a year and a half without issue. I don't use the EBC, and am currently running 9psi

 

[Concept MSP]

I am still running it and I did have to do the resistor fix. Seemed to help it on low boost. Still hit fuel cut at high boost though.

 

[JDM Sam]

There was a bad batch of harnesses when installed it would throw a CEL for crankshaft or camshaft position sensor. Just some FYI for those users that have this problem.

 

[mike6185]

I am currenlty running a Unichip on the high boost setting (10psi) I get boost cut occasionally around 6k and I do throw a CEL. This is all weird b'c its tuned to pull the boost back down to 6psi after 6k to try to prevent the boost cut. Dont really know know why Im getting a CEL! The CEL is usually for a faulty MAF but I just replaced the MAf and it still throws a CEL. Any ideas?

 

[geomatics_tech]

My Unichip runs great, I use a Greddy EBC and keep it under 8psi. Mine has been re-tuned by crossover auto.

 

[JDM Sam]

I am currenlty running a Unichip on the high boost setting (10psi) I get boost cut occasionally around 6k and I do throw a CEL. This is all weird b'c its tuned to pull the boost back down to 6psi after 6k to try to prevent the boost cut. Dont really know know why Im getting a CEL! The CEL is usually for a faulty MAF but I just replaced the MAf and it still throws a CEL. Any ideas?

check the first post

 

[Knox Joe]

I'm running a Unichip with no problems. I bought mine in 07 through a local performance shop.

 

[MSP2024]

mine is being installed right now with my build, ill let you know what i find out on that one

 

[m626gt]

My Friend and I both have Unichips no problems.

 

[mike6185]

check the first post

I signed up for that forum but never got the activation email so I cant see the link

 

[JDM Sam]

I am currenlty running a Unichip on the high boost setting (10psi) I get boost cut occasionally around 6k and I do throw a CEL. This is all weird b'c its tuned to pull the boost back down to 6psi after 6k to try to prevent the boost cut. Dont really know know why Im getting a CEL! The CEL is usually for a faulty MAF but I just replaced the MAf and it still throws a CEL. Any ideas?

Take the Unichip off completely and run it for a few hundred miles and see if the code comes back.

 

[JDM Sam]

Try again on the registering.

Here was what is posted on that forum.
Use these 2 diagrams to diagnose and fix your issue.

<!-- m -->http://www.mazdaspeedtuning.com/unichip/harnessfix.pdf<!-- m -->
<!-- m -->http://www.mazdaspeedtuning.com/unichip ... ematic.jpg

 

[satyr36]

im running it, although i cant get the boost controler to work. probably dont have it hooked up right ><

 

[JDM Sam]

You're only using the 2 small vacuum ports not the big one on the solenoid.
You can leave that hooked up to nothing. 1 end goes to vacuum and 1 to the actuator. The instructions say to tie it into the intake breather line but that is not necessary.

Did you buy it used? It may not be turned on in the programming or the switches maybe not be connected correctly.

 

[greasemonkey524]

Keeping an eye on this thread in case I ever decide to up the boost that high and have issues. No such problems here though.