Strange starting issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drifterdude · 01-09-2008, 11:13 PM

Hi,

Let me start off by saying that I have done a lot of searching, and i came up with some similiar problems that other people's had, but none of there fixes worked out for my car, and things seem to be getting progressively worse.

I have a s13 blacktop sr in my s14, and prior to doing a turbo upgrade the motor was running strong as hell, no starting problems, idle problem, nothing, the motor was perfect. Then i decided to upgrade the motor by adding a gt2871r .64 trim, sard 850cc injectors, z32 mafs, z32 filter, enthalpy tuned ecu, walbro pump, and nismo adjustable fpr.

After getting the motor ready to run, i turn on the car and everything seems fine, except slightly higher idle, but i go to rev up the motor to around 4k and let off and the rpm's will drop and the motor dies and this happens every single time i rev up and let off. So i checked all my vacuum lines, checked fuel pump, and injectors and they all work. So i go to change my spark plugs, then go to fire up the car, and now it holds idle but about 10secs or so of good idling the car dies again. So i unplug my MAFS and fire the car up, and the car stays on, but the instant i plug the sensor back the car dies. So i thought it was a bad mafs. I go to start the car again, but now the car wont start at all.

Also timing should be spot on since i have not toyed around with the timing. Ive changed plugs, checked injectors, mafs was replaced with a working one, full tank of gas, etc...

If anyone can help me figure out why my car wont start now, i would appreciate any and all input.

Thanks in Advance.

01-09-2008, 11:13 PM	#1
drifterdude Leaky Injector Join Date: Aug 2006 Location: las vegas Posts: 117 Trader Rating: (5) Feedback Score: 5 reviews	Strange starting issue Hi, Let me start off by saying that I have done a lot of searching, and i came up with some similiar problems that other people's had, but none of there fixes worked out for my car, and things seem to be getting progressively worse. I have a s13 blacktop sr in my s14, and prior to doing a turbo upgrade the motor was running strong as hell, no starting problems, idle problem, nothing, the motor was perfect. Then i decided to upgrade the motor by adding a gt2871r .64 trim, sard 850cc injectors, z32 mafs, z32 filter, enthalpy tuned ecu, walbro pump, and nismo adjustable fpr. After getting the motor ready to run, i turn on the car and everything seems fine, except slightly higher idle, but i go to rev up the motor to around 4k and let off and the rpm's will drop and the motor dies and this happens every single time i rev up and let off. So i checked all my vacuum lines, checked fuel pump, and injectors and they all work. So i go to change my spark plugs, then go to fire up the car, and now it holds idle but about 10secs or so of good idling the car dies again. So i unplug my MAFS and fire the car up, and the car stays on, but the instant i plug the sensor back the car dies. So i thought it was a bad mafs. I go to start the car again, but now the car wont start at all. Also timing should be spot on since i have not toyed around with the timing. Ive changed plugs, checked injectors, mafs was replaced with a working one, full tank of gas, etc... If anyone can help me figure out why my car wont start now, i would appreciate any and all input. Thanks in Advance.