Maf help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Lawrenceeeeee · 08-05-2014, 04:36 PM

Little frustrated with my s14. Was drifting at a local event, hit a cone and it hit the clutch fan that took my wire harness out. It ripped the distributor,maf, electric fan, intake temp wires. I ended up changing out the harness. Opened the ecu and it had a burnt pin so I changed that too. Car is sparking but won't start. Getting code 12 from ecu. Checked the maf, its getting 13 volts or so constant power but nothing from the white signal wire. I believe its suppose yo have .8 v or so correct? It has 0. Does this signal come from or go to the maf? If it comes from it leads me to believe it's bad. If its going to I have a problem somewhere before my maf. Any help?

Driftwire · 08-06-2014, 06:04 AM

Car would still start with the maf not hooked up.

Driftwire · 08-06-2014, 06:05 AM

I would pull the fuel rail and make sure the injectors are firing. Also double check all the grounds. Sorry for 2 posts

Lawrenceeeeee · 08-06-2014, 01:15 PM

Okay I'll give that a shot. My maf is also giving .8 v out of the 3 wires in the sleeve when its not running. Running its about .3 I don't know why it suddenly be can to get signal.

Lawrenceeeeee · 08-07-2014, 01:02 AM

Okay, pulled the rail. Cranked the car and no gas comes out. I checked continuity and with key on 12v to each pin. I can't check pulse yet as I need someone to help me but, I believe I can hear the fuel pump priming. Very slightly hear a pump prime for a few seconds. Gonna keep diagnosing. Will check back

Lawrenceeeeee · 08-07-2014, 09:22 PM

Right now I pulled the dizzy out. Had it all plugged up and turned the distributor by hand and the injectors click. If I turn it fast enough fuel sprays out of them. I'm led to believe they're not clicking when I'm cranking. Any one ever have an issue like this?

Lawrenceeeeee · 08-07-2014, 11:59 PM

Still pretty stumped. Checked fuses all are good. Fuel pump is priming. The 2 grounds on engine are both good. I am getting spark just injectors aren't pulsing. Ecu is only showing code 55. If cas was bad would it throw a code?

08-05-2014, 04:36 PM	#1
Lawrenceeeeee Leaky Injector Join Date: Dec 2012 Location: Las Vegas Age: 31 Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	Maf help! Little frustrated with my s14. Was drifting at a local event, hit a cone and it hit the clutch fan that took my wire harness out. It ripped the distributor,maf, electric fan, intake temp wires. I ended up changing out the harness. Opened the ecu and it had a burnt pin so I changed that too. Car is sparking but won't start. Getting code 12 from ecu. Checked the maf, its getting 13 volts or so constant power but nothing from the white signal wire. I believe its suppose yo have .8 v or so correct? It has 0. Does this signal come from or go to the maf? If it comes from it leads me to believe it's bad. If its going to I have a problem somewhere before my maf. Any help?

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08-06-2014, 01:15 PM	#4
Lawrenceeeeee Leaky Injector Join Date: Dec 2012 Location: Las Vegas Age: 31 Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	Okay I'll give that a shot. My maf is also giving .8 v out of the 3 wires in the sleeve when its not running. Running its about .3 I don't know why it suddenly be can to get signal.

08-07-2014, 01:02 AM	#5
Lawrenceeeeee Leaky Injector Join Date: Dec 2012 Location: Las Vegas Age: 31 Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	Okay, pulled the rail. Cranked the car and no gas comes out. I checked continuity and with key on 12v to each pin. I can't check pulse yet as I need someone to help me but, I believe I can hear the fuel pump priming. Very slightly hear a pump prime for a few seconds. Gonna keep diagnosing. Will check back

08-07-2014, 09:22 PM	#6
Lawrenceeeeee Leaky Injector Join Date: Dec 2012 Location: Las Vegas Age: 31 Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	Right now I pulled the dizzy out. Had it all plugged up and turned the distributor by hand and the injectors click. If I turn it fast enough fuel sprays out of them. I'm led to believe they're not clicking when I'm cranking. Any one ever have an issue like this?

08-07-2014, 11:59 PM	#7
Lawrenceeeeee Leaky Injector Join Date: Dec 2012 Location: Las Vegas Age: 31 Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	Still pretty stumped. Checked fuses all are good. Fuel pump is priming. The 2 grounds on engine are both good. I am getting spark just injectors aren't pulsing. Ecu is only showing code 55. If cas was bad would it throw a code?