My RB26 doesn't run well at high rpm

[Abdo]

have you changed those plugs lol im sure you have

[turbo corey]

my af is 12.1.i thank it is my tps .i am going to look at that to.

[David_NISMO]

experienced SAU guys swear by NGK's

This could be the ignitor or even cas. Most likely the ignitor. How long has this car been running, is this a brand new swap? What have you changed since the last time it ran well, assuming it ever did?fuel pump manufacturer? fuel pressure gauge? Is the car at WOT when it takes a crap at 6K rpms, does it matter what position the throttle is at?

[turbo corey]

if i put the throttle 1/2 way it will go to 8000 rpms with no problem.but if i go 1/2 throttle and then full throttle i back fires and then run like $hit....my tps at full throttle is 3.61v and just seting is .42v

[lilskyline240]

try riching it up at 11.5:1 at the RPM is start breaking up at. What fuel pump do you have? might need a better one.

[turbo corey]

255 pump but it did this even when i had the stock turbo .i no it is not the pump

[lilskyline240]

this is why you should fix serious problems like this before upgrading thing. All that does it complicates the issue. Sounds like bad grounding now if it did it on the stock turbo

[turbo corey]

i have 5 grounds on the block

[turbo corey]

here is a pic of my motor

[lilskyline240]

well without me being there to hear/see your setup i have no idea what else it could be. Shoulda fixed it before upgrading everything. Cuz now all your doin is probably hurting your motor more

[turbo corey]

i do not drive the car .i drive it to see if i fixed it or not .

[bubzb20z]

if i put the throttle 1/2 way it will go to 8000 rpms with no problem.but if i go 1/2 throttle and then full throttle i back fires and then run like $hit....my tps at full throttle is 3.61v and just seting is .42v

When you finally find what is causing this, b/c I would like to know. My rb20 swapped s13 does the same thing, only no backfiring.

[lilskyline240]

sounds like bad grounds still. Could be the grounds to your coilpacks

[turbo corey]

i think it is the timing .i am going to look at that.i have 5 grounds on the car

[lilskyline240]

you could have 100 grounds on the motor. Still doesnt mean the ground to your coilpacks is good

[turbo corey]

i no it is good ground on the coilpacks

[lilskyline240]

how do you know? you check how good of a ground your harness has?

well good luck to you

[turbo corey]

ok it was my timing on the intake side .it was off 1 tooth

[Abdo]

ok it was my timing on the intake side .it was off 1 tooth

holy sheet.

[lilskyline240]

You might want to take your motor apart now. Reving to 8k rpm with the cam off one tooth prolly messed some **** up

[turbo corey]

the car runs good .being one tooth off will not mess it up at all .

[turbo corey]

today i was diving the car and it is still doing it .that sucks

[bmadd2402]

did you reset the timing with the cas/timing light and reset the ecu after fixing this? it might still br trying to compensate.