RB20 Fuel Cut...

[240luvr]

Hey all, I searched and came up empty handed... if it's already on here I apologize in advance.

Here's the situation... Just got my RB20 installed in my '93 hatch. I bought it out of an 89 and had a buddy come up and change the wiring from SOHC chassis to DOHC...

After I got everything hooked up I took it out and it had a really low fuel cut... like hittin' a brick wall at around 4000rpm... So I figured it was just cause I still had the factory fuel pump (was planning on changing it but didn't have the cash). Now I have a Walboro 255 in it, and it gives me a fuel cut around 5500, I've only noticed it in 3rd, but that's the gear I can best run out around here...

Could this fuel cut be from bad tuning on the SAFC, and the Knock sensors are now picking up knock due to a bad tune? I'm just running an SAFC, the original... It's got an RB25 turbo, front mount, and upgraded injectors. I rode in the car that had the engine in it before and he could run out every gear until the rev limiter (he didn't do it all the time, but if the tires broke loose it never gave a fuel cut).

Any ideas on why I'm still gettin' a fuel cut?

[lilskyline240]

try a diff maf

btw: you still sellin your coupe in a year? lol if you sell it cheap ill take it. lol

[240luvr]

Alright, any other thoughts from anyone else?

and yes.... in about a year the coupe will be for sale haha.

[fly240]

for my, when i boost at 10lb, the car run good all the way red line...but when i crank the boost to 12lb, launching 1st gear has no problem, but when rolling on 2nd or 3rd gear and when it hit around 5000rpm it does cut...i still have not find the problem yet, i believe it's a fuel cut, thinking of getting a fuel cut defencer......if you sovle the problem, let us know...

[lilskyline240]

Alright, any other thoughts from anyone else?

and yes.... in about a year the coupe will be for sale haha.

can you send me pics of the coupe? ill give you $500 bucks in a year since you already got paid for it

[240luvr]

Well guys... it was due to a bad tune on the SAFC... turns out I was maxing out the injectors... it's got stockers in there, I was under the impression they were upgraded... either way, she pulls like a champ now all the way to the rev limiter.

as for the coupe... it has no motor in it... so if you wanna give me 500 go for it... you can get it towed though haha... I was planning on throwing a stock KA in it to sell it for more again... well I'll let ya know in a year.

[lilskyline240]

wanna send me pics to [email protected] of the coupe