KA dumping mass amoutnts of fuel - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

DanDriftS13 · 03-02-2009, 12:45 PM

I have a S13 hatch with a dual cam ka in it. I had an SR in my car and when it blew up I decided to pick up a KA for cheap and drop it in for the time being.

I got an obd2 ka and converted it back to obd1 and dropped it in my car. The motor has all emissions deleted off of it and ran ok for about a month then the MAF died. So I put a stock S13 SR maf onto it that I had laying around and when I did that the car just started to dump mass amounts of fuel into the motor and is blowing black smoke out the exhaust at all rpms on or off throttle. I drove it around for a lil bit to see if the problem would correct itself. I drove about 30 miles and killed 1/4 tank of gas with no change to what the car was doing. I returned home and decided to put the old MAF back and nothing changed. Even with the old broken MAF the car was still dumping fuel so I put the SR MAF back on. I am running a Walboro fuel pump and an adjustable fpr. Right now the fuel pressure is set down to about 20lbs at idle. So far I have changed the O2 sensor and needed to replace the ignition coil as it died and the car was getting no spark at all. Still no change in the preformance of the motor.

I am going to try to get another MAF that I can try as well as borrow and ECU from a friend to see if either of those could be the problem. Other than that I'm not really sure what it could be so any help will be appreciated.

Thank You
-Daniel

Sileighty_85 · 03-02-2009, 01:08 PM

KA DOHC MAF and SR MAF are not the SAME!!

SOHC KA MAF and SR MAF are the same

get the correct KA MAF

DanDriftS13 · 03-02-2009, 01:10 PM

Quote:

Originally Posted by Sileighty_85

KA DOHC MAF and SR MAF are not the SAME!!

SOHC MAF and SR MAF are the same

get the correct KA MAF

Ok I did not know that I will definitely do that then thank you.

zugoi · 03-02-2009, 01:18 PM

You could put a turbo on there and add mass amounts of air to even it out

DanDriftS13 · 03-02-2009, 10:06 PM

Quote:

Originally Posted by zugoi

You could put a turbo on there and add mass amounts of air to even it out

That thought had actually crossed my mind a couple of times lol

kamikazekid · 03-02-2009, 10:17 PM

I second the MAF conclusion, nice work.

DanDriftS13 · 03-03-2009, 12:02 PM

Quote:

Originally Posted by kamikazekid

I second the MAF conclusion, nice work.

Well I got a new dual cam MAF this morning and put it on. The idle of the motor has leaned out but under throttle the car still blows a thick cloud of black smoke out the exhaust and feels like it has lost a lot of power.

Any other ideas?

drifterken · 03-07-2009, 11:50 AM

i'd say turn down ur fuel alil more. just cuhs ur using a the 255 pump.

holemilk00 · 03-07-2009, 11:53 AM

There are two temp sensors, one for the gauge cluster and one for the ECU, if the one for the ECU is gone then the car will dump fuel to try to warm the car up. Check that.

03-02-2009, 12:45 PM	#1
DanDriftS13 Leaky Injector Join Date: Feb 2008 Location: Orlando, Fl Age: 37 Posts: 91 Trader Rating: (0) Feedback Score: 0 reviews	KA dumping mass amoutnts of fuel I have a S13 hatch with a dual cam ka in it. I had an SR in my car and when it blew up I decided to pick up a KA for cheap and drop it in for the time being. I got an obd2 ka and converted it back to obd1 and dropped it in my car. The motor has all emissions deleted off of it and ran ok for about a month then the MAF died. So I put a stock S13 SR maf onto it that I had laying around and when I did that the car just started to dump mass amounts of fuel into the motor and is blowing black smoke out the exhaust at all rpms on or off throttle. I drove it around for a lil bit to see if the problem would correct itself. I drove about 30 miles and killed 1/4 tank of gas with no change to what the car was doing. I returned home and decided to put the old MAF back and nothing changed. Even with the old broken MAF the car was still dumping fuel so I put the SR MAF back on. I am running a Walboro fuel pump and an adjustable fpr. Right now the fuel pressure is set down to about 20lbs at idle. So far I have changed the O2 sensor and needed to replace the ignition coil as it died and the car was getting no spark at all. Still no change in the preformance of the motor. I am going to try to get another MAF that I can try as well as borrow and ECU from a friend to see if either of those could be the problem. Other than that I'm not really sure what it could be so any help will be appreciated. Thank You -Daniel

03-02-2009, 01:08 PM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	KA DOHC MAF and SR MAF are not the SAME!! SOHC KA MAF and SR MAF are the same get the correct KA MAF __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

03-02-2009, 01:18 PM	#4
zugoi Zilvia Junkie Join Date: Aug 2003 Location: Bay area Posts: 560 Trader Rating: (0) Feedback Score: 0 reviews	You could put a turbo on there and add mass amounts of air to even it out __________________ Drunk posting FTW!

03-02-2009, 10:17 PM	#6
kamikazekid Leaky Injector Join Date: Jul 2007 Location: california Age: 36 Posts: 140 Trader Rating: (0) Feedback Score: 0 reviews	I second the MAF conclusion, nice work. __________________ Drifting is not a crime

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03-07-2009, 11:50 AM	#8
drifterken Leaky Injector Join Date: Feb 2007 Location: so cal. Posts: 126 Trader Rating: (2) Feedback Score: 2 reviews	i'd say turn down ur fuel alil more. just cuhs ur using a the 255 pump.

03-07-2009, 11:53 AM	#9
holemilk00 Nissanaholic! Join Date: Oct 2006 Location: Cape Coral, FL Posts: 2,486 Trader Rating: (33) Feedback Score: 33 reviews	There are two temp sensors, one for the gauge cluster and one for the ECU, if the one for the ECU is gone then the car will dump fuel to try to warm the car up. Check that.