Missing and Stalling at idle.I've Spent 2,000$+trying to fix. Its Cursed HELP! - Page 3 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Souljahzs13 · 04-28-2009, 12:52 AM

Im not rocking an SR, but when i first got my KA it ran fine for a few days and it had gotten a flu with the same symptoms of your SR. Long story short after trying almost everything. I cleaned out my IACV with MAF cleaner, it ran ok for a day then went back. I have replaced it with a hand full of used ones and its not worth it. You have not tried it yet but try replacing it a brand new one, yea I know its not cheap but hey... if it doesn't work out you can part out everything you bought brand new, IACV always go bad on every car. Hope this helps GL

lkristoefur · 09-21-2009, 09:50 PM

not sure if you've got the problem fixed but its most likely a vacuum leak if it gets worse after you rev it.. try spraying brake cleaner by the intake manifold or soapy water, if the idle gets worse or better that is where your leak is

Nutter_SR20DET · 10-07-2009, 11:15 AM

"I had a similar issue once, My ECU came unbolted from the chassis and it ran rich and misfired. I replaced the plugs No change, but as soon as i grounded the ECU back to the chassis it ran fine again."

my blacktop is running like shit, I have the ecu just standing up, does that make a difference???? should it be bolted up to the chassis?

Nutter_SR20DET · 10-07-2009, 12:00 PM

Im in the same boat. I began my swap july of '08 and still is not running right. ive prolly spent close to $3000 on parts i thought were bad. in my case it seems like an ignition problem. maybe yall can help.

PROBLEMS I KNOW OF:

headers are not tight ( broken studs)
ECU is code J4, not bolted to chassis
MAFS is not soldered just jerry rigged
o2 sensor not hooked up cuz i havent figured out which wire is which
only no.1 pipe gets hot, 2, gets warm,3and 4 are cold on header
exhaust is cat back, gutted cat, but not hooked up past turbo elbow
ect..ect... bottom line i dont have the time to work on it like i used to so im stuck just getting ideas for now.
to me the car sounds like its got a wrong fire order. all coils are getting spark.
I pulled the plugs and results are as follows:
No.1: Charred, carbon build-up
No.2: soaked with fuel, still brand new
No.3: a lil carbonized, just barely
No.4: soaked with fuel.

my oil smells like fuel, the car is really rich
fires up immediatly when u try to start it
give it throttle real boggy cant reach 5k

so go head and flame away, my neighbor said he was a mechanic and would help with the swap, but in the middle of swappin it he moved away so im stuck now with no mechanic skills, i just drive. but after all that i mentioned is good 2 go i feel like its still going to run like shit

TheWayItGoes909 · 02-08-2010, 03:45 PM

SOoo did you ever fix the problem? was it the PFC map?

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04-28-2009, 12:52 AM	#61
Souljahzs13 Zilvia Addict Join Date: Nov 2008 Location: five6deuce Posts: 960 Trader Rating: (66) Feedback Score: 66 reviews	Im not rocking an SR, but when i first got my KA it ran fine for a few days and it had gotten a flu with the same symptoms of your SR. Long story short after trying almost everything. I cleaned out my IACV with MAF cleaner, it ran ok for a day then went back. I have replaced it with a hand full of used ones and its not worth it. You have not tried it yet but try replacing it a brand new one, yea I know its not cheap but hey... if it doesn't work out you can part out everything you bought brand new, IACV always go bad on every car. Hope this helps GL

09-21-2009, 09:50 PM	#62
lkristoefur Zilvia Member Join Date: Sep 2009 Location: Moorpark Posts: 207 Trader Rating: (6) Feedback Score: 6 reviews	not sure if you've got the problem fixed but its most likely a vacuum leak if it gets worse after you rev it.. try spraying brake cleaner by the intake manifold or soapy water, if the idle gets worse or better that is where your leak is

10-07-2009, 11:15 AM	#63
Nutter_SR20DET Join Date: Sep 2009 Location: Georgia Posts: 16 Trader Rating: (0) Feedback Score: 0 reviews	"I had a similar issue once, My ECU came unbolted from the chassis and it ran rich and misfired. I replaced the plugs No change, but as soon as i grounded the ECU back to the chassis it ran fine again." my blacktop is running like shit, I have the ecu just standing up, does that make a difference???? should it be bolted up to the chassis?

10-07-2009, 12:00 PM	#64
Nutter_SR20DET Join Date: Sep 2009 Location: Georgia Posts: 16 Trader Rating: (0) Feedback Score: 0 reviews	Im in the same boat. I began my swap july of '08 and still is not running right. ive prolly spent close to $3000 on parts i thought were bad. in my case it seems like an ignition problem. maybe yall can help. PROBLEMS I KNOW OF: headers are not tight ( broken studs) ECU is code J4, not bolted to chassis MAFS is not soldered just jerry rigged o2 sensor not hooked up cuz i havent figured out which wire is which only no.1 pipe gets hot, 2, gets warm,3and 4 are cold on header exhaust is cat back, gutted cat, but not hooked up past turbo elbow ect..ect... bottom line i dont have the time to work on it like i used to so im stuck just getting ideas for now. to me the car sounds like its got a wrong fire order. all coils are getting spark. I pulled the plugs and results are as follows: No.1: Charred, carbon build-up No.2: soaked with fuel, still brand new No.3: a lil carbonized, just barely No.4: soaked with fuel. my oil smells like fuel, the car is really rich fires up immediatly when u try to start it give it throttle real boggy cant reach 5k so go head and flame away, my neighbor said he was a mechanic and would help with the swap, but in the middle of swappin it he moved away so im stuck now with no mechanic skills, i just drive. but after all that i mentioned is good 2 go i feel like its still going to run like shit

02-08-2010, 03:45 PM	#65
TheWayItGoes909 Zilvia Junkie Join Date: Sep 2008 Location: Inland Empire Posts: 382 Trader Rating: (10) Feedback Score: 10 reviews	SOoo did you ever fix the problem? was it the PFC map?