Rb20 Laggy

[sneekypete]

i have just finished doning the major service on my car and now it is very laggy and has no kick. Here are the mods after it was running good.

rb25 s1 turbo

cam gears - set at 0 degrees

cam belt

walbro 255l pump

computer has been reset but still problems. I know it should be retuned but i thought it would run better than this. Power flattens off at around 4500rpm. It feels like a cam tooth out but i have double checked.

[skylinegtts]

have you checked ur timing?

most likely problem assuming ur not a tooth out

[RaZ_TuRbO]

i would check tooth timing again it can slip so easy.

[sneekypete]

will double check again, 15 degrees when i check first.

[sneekypete]

i have checked it and everything lines up perfect. the belt is deff not the problem. Is there anything else that would cause a problem with ignition timing? another sensor. the cas is in right as i checked that the locating dowel is still there.

[Adriano]

Did you check the timing with a timing light?

[sneekypete]

yes clipped it onto the looped wire on the back of the coil cover. do you need to eart out a wire or anything like that as i know you have to do things like that on other cars, have not done much work on skylines. it was originally an automatic and still has the same computer, ran fine before though. changed the clutch as well but cant see how that would effect it.

Edited July 21, 2008 by sneekypete

[sneekypete]

is there a special way to check timing?

[SDEWY5]

thought normally when checking timing, timing light sensor is usually clipped to the first cylinder, the one closest to the cam gears...probably makes no difference but yea, maybe?

[sneekypete]

bit hard when they use coil packs. dont you connect it to the looped black wire at the back of the covers?