Car idles great, dies on throttle.

[Model Citizen]

Cross posting this from the fi section to get some more direction to go in.

Car has kw sc, vta catch can, stock on engine otherwise.

So far i've checked all sc kit plumbing, all vaccum lines (including spraying with cleaner), put a boroscope on the throttle body and sc turbine, changed the plugs, picked up a spare coil pack, removed the sc from the picture (reroute plumbing directly, stock map sensor, stock tune), put the sc back into the loop as it was.

Vehicle cuts power and evetually dies under throttle application, currently around 2.5k rpm. Especially now with new plugs the idle is smooth, video was pre plug change. No cel.

http://www.datazap.me/u/utekineir/ne...0&data=5-41-66

[ame="https://www.youtube.com/watch?v=m-P_7FVZ71g&list=UUhvDJ0loszAdzRWUwe6V3-A"]External - YouTube[/ame]

passenger side
image by utekineir, on Flickr

Driver side
image by utekineir, on Flickr


Right now i'm leaning toward a fueling issue. Unfortunately i'm log retarded when it comes to reading them.

Thanks,

[Moskoi]

Did the car started to do that all of a sudden? Any check engine codes?
Maybe fuel pressure. To test if it's fuel pressure related, apply throttle and spray in some carb cleaner in the intake. It may backfire from the throttle body, so take care. If you can run the engine with the carb cleaner, the fuel pressure is too low.
I would guess that the timing chain is off, the ecu would trigger the spark way off the normal timing when throttle is applied.

[Model Citizen]

Originally Posted by Moskoi

Did the car started to do that all of a sudden? Any check engine codes?
Maybe fuel pressure. To test if it's fuel pressure related, apply throttle and spray in some carb cleaner in the intake. It may backfire from the throttle body, so take care. If you can run the engine with the carb cleaner, the fuel pressure is too low.
I would guess that the timing chain is off, the ecu would trigger the spark way off the normal timing when throttle is applied.

No cel, happened in the middle of driving and required me picking up my trailer to tow the vehicle home.

New video, same symptoms.

[ame="https://www.youtube.com/watch?v=m-j7mBo26JM"]Power cut - YouTube[/ame]

[Model Citizen]

Originally Posted by Moskoi

Did the car started to do that all of a sudden? Any check engine codes?
Maybe fuel pressure. To test if it's fuel pressure related, apply throttle and spray in some carb cleaner in the intake. It may backfire from the throttle body, so take care. If you can run the engine with the carb cleaner, the fuel pressure is too low.
I would guess that the timing chain is off, the ecu would trigger the spark way off the normal timing when throttle is applied.

tried it at idle, instant kill.

[Model Citizen]

This looks like a valid culprit.

[Moskoi]

What is it?