TwelveAM
04-01-2013, 09:13 PM
Sorry if the read is a bit long, but I'm putting as much detail as I can since I'm breaking my head/pocket with this issue.
Sup guys, been breaking my head reading, researching, and heading out to different shops to find the issue with my car, and still have not gotten it resolved.
Got my swap done last weekend and have been driving around with a bogging/hiccuping situation where my car starts to get some kind of fuel cut once the boost kicks in. Specifically at 4k+ RPM the RPM starts to bog and causing the car to start hopping or hiccuping, same as for example I'm cruising on 4th gear at ~40mph at around 2k RPM the car starts bogging and hiccuping. In addition to these symptoms, the car idles pretty rough on a complete stop and will randomly stall on me at a complete stop on neutral. :wtf:
Prior to doing the swap, I had the whole swap on my other chassis in which it was running just fine. The only difference with this swap is that I no longer have a Power FC. I now have a JWT tuned ECU for this set up that they sold me.
My set up:
S14 Zenki SR20det
740cc injectors (according to the old owner of the motor)
Z32 MAF
GT2871R
At first once I picked up the car, I thought it was a fuel delivery issue (since I still had the stock fuel pump in it). I immediately went out and upgraded to a Walbro 255lph, and changed my old fuel filter to a new OEM Z32. The issue seemed to smooth out since I'm more than sure that had some restraining to due with it, but the bogging still remains. The spark plugs were changed with the swap so they're new, but they're still white meaning the car was running pretty lean.
I took it on over to RRR Dyno Tuning where they regulated my A/F ratio to 10:7 and regulated my fuel pressure to 45psi and fixed my engine's timing. Nelson at RRR Dyno assumes it's an ignition/electrical issue, but definitely not fuel related, because the car cuts off at boost - to his words.
The only possibilities left that I have in mind:
Bad ground somewhere?
Fuel pump not getting enough voltage?
Usage of the stock 2" exhaust with the set up?
Bad distributor? Cap/rotor? or Spark plug wires?
Someone enlighten me on this issue, I am completely confused and annoyed with wanting to get this thing running smooth since it's my daily driver, the least I'm wanting to happen is to fuck up my engine. Thanks guys.
Sup guys, been breaking my head reading, researching, and heading out to different shops to find the issue with my car, and still have not gotten it resolved.
Got my swap done last weekend and have been driving around with a bogging/hiccuping situation where my car starts to get some kind of fuel cut once the boost kicks in. Specifically at 4k+ RPM the RPM starts to bog and causing the car to start hopping or hiccuping, same as for example I'm cruising on 4th gear at ~40mph at around 2k RPM the car starts bogging and hiccuping. In addition to these symptoms, the car idles pretty rough on a complete stop and will randomly stall on me at a complete stop on neutral. :wtf:
Prior to doing the swap, I had the whole swap on my other chassis in which it was running just fine. The only difference with this swap is that I no longer have a Power FC. I now have a JWT tuned ECU for this set up that they sold me.
My set up:
S14 Zenki SR20det
740cc injectors (according to the old owner of the motor)
Z32 MAF
GT2871R
At first once I picked up the car, I thought it was a fuel delivery issue (since I still had the stock fuel pump in it). I immediately went out and upgraded to a Walbro 255lph, and changed my old fuel filter to a new OEM Z32. The issue seemed to smooth out since I'm more than sure that had some restraining to due with it, but the bogging still remains. The spark plugs were changed with the swap so they're new, but they're still white meaning the car was running pretty lean.
I took it on over to RRR Dyno Tuning where they regulated my A/F ratio to 10:7 and regulated my fuel pressure to 45psi and fixed my engine's timing. Nelson at RRR Dyno assumes it's an ignition/electrical issue, but definitely not fuel related, because the car cuts off at boost - to his words.
The only possibilities left that I have in mind:
Bad ground somewhere?
Fuel pump not getting enough voltage?
Usage of the stock 2" exhaust with the set up?
Bad distributor? Cap/rotor? or Spark plug wires?
Someone enlighten me on this issue, I am completely confused and annoyed with wanting to get this thing running smooth since it's my daily driver, the least I'm wanting to happen is to fuck up my engine. Thanks guys.