turboed lsv help!!!! why is it running like shit?

[jap_racer1]

ok this is the same exact setup same ecu same injectors same everything i had in my car in the beginning and it ran fine but i cracked a sleeve which is a stock lsv boosted
i rebuilt this motor as of now it has around 400-500 miles on it the first day i cranked it up it idled a lil rough but fine at around 1000 then u rev it and after 1/8 throttle it starts running on 3 cylinders or missfiring really bad
i have new cap new plugs new rotor button such forth so on
i changed the fuel injectors around and it ran perfect for about a full day then slowly dropped again and now its back to running like shit any ideas

if i drive it and barely throttle it does ok revs up fine but once i start pushing the pedal down more it starts running on three cylinders i have no idea wtf it is and im about tired of messing with it im looking for ideas people!

[joshk5145]

My car did something like that a while back. One of my grounds came loose. It was still connected but would wouldn't pull the car into the higher rpm range. Does your car have any kind of tune at all?

[Bacon]

Timing, dizzy, grounds, ignition......check those first.

[RBS]

either timing is wrong, ecu is going bad, injector is going bad, or CYP sensor is going bad. does it have a CEL?

[x_doug_x]

check the ecu ground on the thermostat housing and get back to us.

[jap_racer1]

ground is tight already made sure of that i mean everything is the same there rc injectors and there are no check engine lights

[x_doug_x]

if your plug wires are all rite, same ecu, grounds are good, injectors are good, timing is rite, cap/rotor are good, ecu is good, no air leaks, same fuel pump.


i'd be willing to bet your valves are too tight and need adjusted. do a compression test.

[j0nbunklah0m]

maybe change ur fuel filter too

[SPOOLIN]

if it was mechanical it would do it all the time. have you changed the dizzy? they can go bad without warning, at any moment.

[jap_racer1]

ok i did another compression check and its all under 120 im praying a valve adjustment but i think i washed the rings! so i guess all i can say is FUCK!!!

[SPOOLIN]

washed rings? Man ive hydrolocked engines on fuel and never "washed" rings.

[jap_racer1]

i never have washed rings before either its stock ls pistons on stock shot peened rods with npr rings clevite bearings because acl are outta stock worldwide it was honed and has a block guard installed so idk this head has been on 3 motors and it was decked before put on this one also. so idk the rings were seated right i always put oil on the cylinder walls before installation im just more lost than a fat kid in an organic vegetarian restaraunt!

[jap_racer1]

it was all in the head took the head off finally and put water in the ports and all the intake were leaking so that was the problem