Boosted lsx backfiring under boost
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
You need to find out if they're broken first !
Coils have one main power ground which needs to be good and ideally grounded local to the coils.
The other wire sometimes called a ground and can be grounded in aftermarket ecu installs is actually a misfire detection feedback wire, but technically it is not a ground.
Other two are 12v and ecu trigger to charge/fire the coil.
Coils have one main power ground which needs to be good and ideally grounded local to the coils.
The other wire sometimes called a ground and can be grounded in aftermarket ecu installs is actually a misfire detection feedback wire, but technically it is not a ground.
Other two are 12v and ecu trigger to charge/fire the coil.
Staging Lane
Joined: Jan 2016
Posts: 52
Likes: 0
I have a couple questions.
#1 you said this was a new engine with 50K mile warranty.
Have you had this issue from the beginning?
#2 you also stated your grounds are white.
Is this like a corrosion white? (Powdery substance)
Joe
#1 you said this was a new engine with 50K mile warranty.
Have you had this issue from the beginning?
#2 you also stated your grounds are white.
Is this like a corrosion white? (Powdery substance)
Joe
Here's my take on this. First buy a new map sensor making sure the replacement is the exact same Bar rating. Then ohm out each of the 3 wires from the sensor connector to the PCM connectors with battery disconnected and pcm connectors removed. Also if your using Hptuners you must delete the Maf PID to read the map sensor correctly in a speed density config. Also TR6 plugs gapped at .025 should not be blowing spark out at 15psi unless you have weak coils or a voltage or grounding issue. Make sure to post what fixes the problem.
