Do I need chip for denso 660cc?

[WhyteSpyder]

Ok, I have a supra fuel pump, denso 660cc injector and aeromotive fpr (43 psi) on my 2g and now the car will not hold idle at 750-800rpm whenever I come to a stop or when I rev it up and let off on the gas. Instead my rpm drop all the way down to 0 rpm and the car die. The car starts right up and idle fine at around 750-800 rpm. Does anyone know of any fix, Or do I need a new chip for the 660cc injector?

 

[allturbo]

you didn't mention any type of fuel control (ie afc). that's a must when upgrading your fuel system.

 

[KRAZYKOREAN]

660cc chip yeah you would if you had a vpc...tell me are you venting your bov?

 

[WhyteSpyder]

Complete mod is in my profile....but here is what I have for fuel control and what not... I have a Apexi S-AFC II set at Hi -26 across and Lo -18 across (30%-85%). Egt shows 900 at idle and 1200 at 3000 rpm doing 70mph on highway, don't know if I'm running lean or not but my A/F guage led doesn't light up or jumps back and forth as it did before this upgrade while driving and only one led light up on the highway. I'm having the car dyno tune at Elite next Tuesday as I don't know how to tune her. I am running a Dual Blitz BOV which vent to atmosphere.

 

[allturbo]

some cars have problems venting to the atmosphere. I know my car dies if I vent, but my cousins doesn't. That might be the problem.

 

[jdmawd]

Originally posted by WhyteSpyder
Ok, I have a supra fuel pump, denso 660cc injector and aeromotive fpr (43 psi) on my 2g and now the car will not hold idle at 750-800rpm whenever I come to a stop or when I rev it up and let off on the gas. Instead my rpm drop all the way down to 0 rpm and the car die. The car starts right up and idle fine at around 750-800 rpm. Does anyone know of any fix, Or do I need a new chip for the 660cc injector?

I would first route the BOV back into the intake if that does not fix your problem. You may have leaking throttle shaft seals or a problematic ISC

 

[WhyteSpyder]

I'm not sure if venting to atmosphere is what's causing this because I'd never had this problem before until after I installed the fuel pump and injectors.

 

[Newlogics]

Originally posted by WhyteSpyder
I'm not sure if venting to atmosphere is what's causing this because I'd never had this problem before until after I installed the fuel pump and injectors.

Hmm.. I've developed identical problem after isntalling 660s.
I run HKS SSQV vented.

For a short-term fix, you can raise your idel a bit with BISS screw. It'' be a bit more tolerant for throttle drops.

I'm planning to get recirculation kit for the SSQV, so will see if that is the problem.