louisdaboois
05-21-2010, 02:07 PM
Hey guys, need help from some ka-t gurus. To start off, here's my setup.
DOHC KA.
Weisco 9:1 pistons
Eagle h-beam rods
cometic head gasket
arp studs (everywhere in the motor at least...)
GTIR T28
top feed fuel rail
RC 550cc inj.
mallory fpr (32psi vac. 40ish unvac)
Z32 mafs
ssac manifold
innovative wideband
Enthalpy tune
SAFC 2
Here's a background summary. I've had my ka-t setup since '06. Few drift events, I drive the car seasonally. That is, I have a daily that I drive most of the time, but when summer time comes, the 240 is the main source of transportation. I do NOT drive like a jackass on the street, I am a very conservative driver on public roads.
Recently, I was driving from work, got home, parked the car, went inside and called it a night. Next morning, I went to start the car and no go. The motor cranked like normal, however no start. After a few tries, I figured the cylinders were full of fuel so I pulled the fuel pump fuse out and cranked. The car started, but ran rough.... REALLY rough and fuel smoke was pouring out of the exhaust. However, that's not what freaked me out. With the fuel pump fuse still OUT and the car still running... i was able to drive the car from the front of my house, all the way to the back and into the garage.
I checked over all of the basic stuff. I have spark, fuel, compression. Checked the IC piping for leaks as well as random vacuum lines. Replaced the MAFS with a known good one. Checked the OHMS for each injector (which read 13ohms for all four). Replaced the coolant temp sensor with a NEW one from NISSAN.
Finally, I narrowed it down the the SAFC. So, I reconnected the MAF signal wire on the ecu back to factory. After doing so, the car cranked and started up perfectly fine. No missing cylinder, just smooth as before. Only problem, my afr's were reading 9.8 to 10 at idle. I see a small stream of smoke from the exhaust, smells like gas (obviously)
I'm guessing ecu?
p/s for those of you who like to jump on the thread bashing bandwagon keep your comments to yourself. I dont care what your thoughts of my setup or diagnostic procedures are, just stfu. Just need other ideas to alleviate this problem.
Thanks in advance
DOHC KA.
Weisco 9:1 pistons
Eagle h-beam rods
cometic head gasket
arp studs (everywhere in the motor at least...)
GTIR T28
top feed fuel rail
RC 550cc inj.
mallory fpr (32psi vac. 40ish unvac)
Z32 mafs
ssac manifold
innovative wideband
Enthalpy tune
SAFC 2
Here's a background summary. I've had my ka-t setup since '06. Few drift events, I drive the car seasonally. That is, I have a daily that I drive most of the time, but when summer time comes, the 240 is the main source of transportation. I do NOT drive like a jackass on the street, I am a very conservative driver on public roads.
Recently, I was driving from work, got home, parked the car, went inside and called it a night. Next morning, I went to start the car and no go. The motor cranked like normal, however no start. After a few tries, I figured the cylinders were full of fuel so I pulled the fuel pump fuse out and cranked. The car started, but ran rough.... REALLY rough and fuel smoke was pouring out of the exhaust. However, that's not what freaked me out. With the fuel pump fuse still OUT and the car still running... i was able to drive the car from the front of my house, all the way to the back and into the garage.
I checked over all of the basic stuff. I have spark, fuel, compression. Checked the IC piping for leaks as well as random vacuum lines. Replaced the MAFS with a known good one. Checked the OHMS for each injector (which read 13ohms for all four). Replaced the coolant temp sensor with a NEW one from NISSAN.
Finally, I narrowed it down the the SAFC. So, I reconnected the MAF signal wire on the ecu back to factory. After doing so, the car cranked and started up perfectly fine. No missing cylinder, just smooth as before. Only problem, my afr's were reading 9.8 to 10 at idle. I see a small stream of smoke from the exhaust, smells like gas (obviously)
I'm guessing ecu?
p/s for those of you who like to jump on the thread bashing bandwagon keep your comments to yourself. I dont care what your thoughts of my setup or diagnostic procedures are, just stfu. Just need other ideas to alleviate this problem.
Thanks in advance