Thread: LS1 Boggs when given throttle...UPDATED VIDEO INSIDE!!!..PLEASE NEED HELP!!!

Ok my car starts up fine everytime. NOW when I give it some gas (throttle) it wants to die out, then if I let off and catch it.... it will go back to idle and be ok. Now it did this with my ls6 intake and 78mm t/b combo as its doing it with my new fast 102mm combo...SAME IDENITCAL THING. Thought maybe the swap would take care of it...WRONG!!!
Now I notice WAYYYY more raw fuel smell and makes my eyes water. I also noticed this: When I unplugged the Intake Air Temp sensor (IAT) it seems to be more responsive on the throttle side, then when plugged back in it sounds like its not getting fuel or like choking out and stumbles and can die out or real close at times.
I replaced the IAT with a new one and still same results. :bang:
The car is tuned with a SPEED DENSITY TUNE so no MAF Sensor.

I need some LSx Master Techs input what to look at, where to start,please help
Here is the video, and yes I know there is no coupler in between the t/b and lid it did with it on or off. and also everything its doing with this 102mm setup it did the same stuff on my ls6 intake 78mm t/b setup also.
YouTube - Boggin issue?

TOO RICH. What is youre AFR at idle?. Do yo have a wideband?

Do you have a tuner? EFI live, or Hptuners, that you can watch the MAP sensor?

sounds like a manifold vaccume leak, maybe... just too many things it could be.. IDK why the IAT would effect it... that is wierd..

another shot in the dark.. check grounds... the one on the back of the head, that comes from your harness.. are you seeing any voltage drop when you give it gas??

Codes? anything??

Take it back to rick.
Without a logger or a ses light on your just guessing.

could be a number of things, and like Nate said, if you cant see what is goin on, your in the dark..

Taking it back to synergy is a mission!!! good luck!

U can back probe the tps also.make sure no opens in the tps.back probe ur map sensor with key on engine off with a hand held litle vac pump and start at zero vac and go in stages to 20inches,you should see a volt reading from 4.8 to like .5volts threwout the range.also if he is still. Using the o2sensors and u have a shorted one it can cause all kinds off weird issues.

Originally Posted by 02_ramair_ta

Do you have a tuner? EFI live, or Hptuners, that you can watch the MAP sensor?

sounds like a manifold vaccume leak, maybe... just too many things it could be.. IDK why the IAT would effect it... that is wierd..

another shot in the dark.. check grounds... the one on the back of the head, that comes from your harness.. are you seeing any voltage drop when you give it gas??

Codes? anything??

A shorted low iat will adda bunch a fuel because basically its telling the ecu the car is at 80 bellow zero thus adding more fuel.

Nate what any relays being bad causing the sensors to read bad? just throwing it out there, like you said i'm in the dark til I get to rick sometime next week.

doubt full,there is a o2 fuse that powers up the o2 heater circuits.

hey go check your pm at nc1320