Jump to content
SAU Community

Recommended Posts

Hey guys 

Recently had my rb20det Gts4 Rebuilt.

The car seems very laggy until about 4.5-5k revs until boost hits all at once, when shifting on the highway from 3rd to 4th or 5th gear it also jerks and shudders until boost hits again it definitely does not seem normal. Sometimes between shifting it will pop out the exhaust. 

The car has just had timing set up correctly and also a vacuum leak test. also had a compression test done which came out good. 

next thing to try will be testing the tps 

If anyone has any ideas on where else to try look at would be appreciated! 

car just has a fmic and a walbro 255lph fuel pump. still factory ecu 

@GTSBoyFuel pump is new. I haven’t tested the fuel pressure under load but that might be worth trying! fuel pump is still just plugged straight into factory loom without a constant 12v 

On 07/02/2022 at 1:09 PM, RBpete said:

fuel pump is still just plugged straight into factory loom without a constant 12v 

that's a problem itself, aftermarket pumps consume more current than the OEM wiring can handle - not to mention the OEM drop resistor isn't very helpful in keeping these modern pumps alive.

You need to wire it properly OR PWM them.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Latest Posts

    • The fancy pants red shock tower brace is finally incoming from MX5 Mania, getting it shipped from 'Merica has been a long and problematic process, and GWR, the 'Merican supplier will not ship directly to consumers outside of the US, Mania basically had to order a heap of them, the colour choice was silver, or red, and we all know anything red adds 5 killerwasps of dynotorques..... Whilst it does fit over a 2.5, and I've seen a few photos and videos of it being installed and fitting, google also says it might get real close to the FAB9 intake front runner, people in the US says it does fit with the FAB9 intake, except for one person who said it slightly touched.......so there is that.....LOL..... As it seems that I am the first in AU to have this combination of parts there's no local knowledge about fitment, so I'm just a willing guinea pig in this endeavour, I'll cross my fingers and toes and hope for the best In other news, I ordered stuff from China  on the same day I ordered the 23° silicone bend from Victoria, the stuff from China arrived a day ago, the 23° silicone bend is still travelling around Australia thanks to Australia Post, and "may" be here next week
    • Very good news...I contacted Racebox about it last night. My car is a 2016 so remains to be seen if it is compatible, requires a TCU swap, or is impossible.
    • What ECU are you running? This is probably the biggest question. If it's a PowerFC, I'd probably change the ECU and get something newer that will handle the injectors in a nicer way.
    • FYI: Racebox RE7R Custom Tunes Released!   https://goracebox.com/.../2017-infiniti-q50-q60-re7r-tcm...   FOR GEN 2 (21+) VEHICLES, PLEASE SEE NOTE AT BOTTOM See more   But whomever tuned your car is the tuner you should go back to, AMS, Sonictune or BT Tune....
×
×
  • Create New...