HELP wont stay running - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

akira2_03 · 04-26-2009, 01:36 PM

well after replacing everything with my harness and all the car runs at idle as long as no maf is plugged in. if plug in maf it dies. and again this is the maf from my dd 240sx. but it will run with no maf but if accelerate it it back fires like its running rich and hesitation. so...... went to the fuel next

k well as the return line had no fuel coming out. (disconnected it up front beside the fuel filter) i took out my fpr and fuel came running out at the end of the rail. so figured i found the problem. replaced the fpr and put all back together and started the car. same thing no fuel coming out of the return line. car dies if maf is plugged in but idles with no maf but STILL no fuel out my return line!!! soooo is there a huge clog or something in my lines you think???? after the fpr???

heres a vid of how it runs. and i cant plug maf in or it dies. and it is a good maf as it is from my dd 240sx

akira2_03 · 05-19-2009, 02:28 PM

so been tinkering more and still have no fuel coming out from my fpr. lines are clear blew air threw them no prob. fuel pump is running but after it idels for a while or you try to give it gas and it hesitates sometimes revs up and when let off the gas it almost dies but idles back up. mind you this is all with no maf plugged in. im thinking it starving for fuel? maybe pump is not pumping enough?? the sock looks blackish grey on the pump. so im thinking i can try to change it if i can find another. anything else?????? suggestions? cant find any vac leaks.

s142jzkillav10 · 05-19-2009, 07:59 PM

have you checked your timeing ??

akira2_03 · 05-19-2009, 10:51 PM

yes timing is set dead on with new dizzy

jspeedm · 05-22-2009, 01:37 PM

fuel filter?

Shadowhunter · 05-26-2009, 05:57 PM

Are you sure the fuel pressure regulator settings are correct? If not you may not be spitting the required fuel pressure to keep your engine running.

04-26-2009, 01:36 PM	#1
akira2_03 Join Date: Sep 2008 Location: canada Age: 37 Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	HELP car not running right! well after replacing everything with my harness and all the car runs at idle as long as no maf is plugged in. if plug in maf it dies. and again this is the maf from my dd 240sx. but it will run with no maf but if accelerate it it back fires like its running rich and hesitation. so...... went to the fuel next k well as the return line had no fuel coming out. (disconnected it up front beside the fuel filter) i took out my fpr and fuel came running out at the end of the rail. so figured i found the problem. replaced the fpr and put all back together and started the car. same thing no fuel coming out of the return line. car dies if maf is plugged in but idles with no maf but STILL no fuel out my return line!!! soooo is there a huge clog or something in my lines you think???? after the fpr??? heres a vid of how it runs. and i cant plug maf in or it dies. and it is a good maf as it is from my dd 240sx Last edited by akira2_03; 05-19-2009 at 02:27 PM..

05-22-2009, 01:37 PM	#5
jspeedm Nissanaholic! Join Date: Jul 2008 Location: SoCal 562 Age: 42 Posts: 1,680 Trader Rating: (26) Feedback Score: 26 reviews	fuel filter? __________________

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05-19-2009, 02:28 PM	#2
akira2_03 Join Date: Sep 2008 Location: canada Age: 37 Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	so been tinkering more and still have no fuel coming out from my fpr. lines are clear blew air threw them no prob. fuel pump is running but after it idels for a while or you try to give it gas and it hesitates sometimes revs up and when let off the gas it almost dies but idles back up. mind you this is all with no maf plugged in. im thinking it starving for fuel? maybe pump is not pumping enough?? the sock looks blackish grey on the pump. so im thinking i can try to change it if i can find another. anything else?????? suggestions? cant find any vac leaks.

05-19-2009, 07:59 PM	#3
s142jzkillav10 Zilvia Junkie Join Date: Mar 2009 Location: Kill Devil Hills, NC aka OBX Posts: 309 Trader Rating: (5) Feedback Score: 5 reviews	have you checked your timeing ??

05-19-2009, 10:51 PM	#4
akira2_03 Join Date: Sep 2008 Location: canada Age: 37 Posts: 8 Trader Rating: (0) Feedback Score: 0 reviews	yes timing is set dead on with new dizzy

05-26-2009, 05:57 PM	#6
Shadowhunter Zilvia Addict Join Date: Aug 2008 Location: San Diego,CA Age: 36 Posts: 647 Trader Rating: (10) Feedback Score: 10 reviews	Are you sure the fuel pressure regulator settings are correct? If not you may not be spitting the required fuel pressure to keep your engine running.