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

hoytt123 · 11-17-2012, 08:16 PM

okay so i was driving my s13 today, and i was playing with the boost a little just doing small pulls, i have all stock s14 sr20det parts, it was good early in the day but then i went back out and had to drive to my friends and i got on the freeway and tried to accelerate, and my boost wouldnt push over 5 pounds when earlier i had 10 pounds, i checked for a boost leak and i could find one, but my car wont go over like 3500 rpms until it feels like it is bogging down. PLEASE HELP!!!!!!!!

Frank_Jaeger · 11-17-2012, 08:17 PM

Check MAF

msglngthfkdarules

hoytt123 · 11-17-2012, 08:19 PM

okay could it just be my airfilter being cloughed i have some janky mushroom like sponge filter that came with the car on it now

K3MPS · 11-17-2012, 08:32 PM

what fuel pump are you running?

hoytt123 · 11-17-2012, 08:34 PM

walbro 255 i believe, this has never happened before and i do mini pulls like everyday

*brndck* · 11-17-2012, 08:37 PM

most likely bad maf.

hoytt123 · 11-17-2012, 08:38 PM

how would i be able to tell?

rb25_s13*CHUKI · 11-17-2012, 08:38 PM

maf maf maf maf maf

steve shadows · 11-18-2012, 03:40 PM

Could be boost leak as well...that is getting worse and worse and worse. I would also check ground for coil packs as well. I would also check your timing since about 90% of the cars I run into the CAS timing or base timing is incorrectly which mean the car runs at like half horsepower....kind of sad...

Cedarcbr · 11-19-2012, 06:47 PM

had pretty much this same issue today and it turned out the 2 of my plugs had hairline cracks in them after 3K miles, not sure how it happened but changed plugs and she runs like a champ now, just my 2 cents

ultimateirving · 11-19-2012, 07:49 PM

Does it only break up at 3500 while in boost? or does itbreak up even if just at cruising speed, say 80mph?
Because if it breaks up in boost, but not while cruising, you have a boost leak, and need a tester to find it.
If ur maf is bad, i doubt youd even be able to get down the street.

11-17-2012, 08:16 PM	#1
hoytt123 Leaky Injector Join Date: Mar 2012 Location: Minnesota Posts: 69 Trader Rating: (1) Feedback Score: 1 reviews	Helppppppppp okay so i was driving my s13 today, and i was playing with the boost a little just doing small pulls, i have all stock s14 sr20det parts, it was good early in the day but then i went back out and had to drive to my friends and i got on the freeway and tried to accelerate, and my boost wouldnt push over 5 pounds when earlier i had 10 pounds, i checked for a boost leak and i could find one, but my car wont go over like 3500 rpms until it feels like it is bogging down. PLEASE HELP!!!!!!!!

11-17-2012, 08:38 PM	#8
rb25_s13*CHUKI Post Whore! Join Date: Mar 2007 Location: Cali Age: 36 Posts: 2,759 Trader Rating: (16) Feedback Score: 16 reviews	maf maf maf maf maf __________________ Obliterate

11-18-2012, 03:40 PM	#9
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	Could be boost leak as well...that is getting worse and worse and worse. I would also check ground for coil packs as well. I would also check your timing since about 90% of the cars I run into the CAS timing or base timing is incorrectly which mean the car runs at like half horsepower....kind of sad... __________________ Like Me on FaceBook !

11-19-2012, 07:49 PM	#11
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 37 Posts: 1,521 Trader Rating: (1) Feedback Score: 1 reviews	Does it only break up at 3500 while in boost? or does itbreak up even if just at cruising speed, say 80mph? Because if it breaks up in boost, but not while cruising, you have a boost leak, and need a tester to find it. If ur maf is bad, i doubt youd even be able to get down the street. __________________ Z32 with lq4 swap Desert Street Scene \|\| Dssevents.com

11-17-2012, 08:17 PM	#2
Frank_Jaeger Zilvia FREAK! Join Date: Jan 2012 Location: Port Charlotte, Florida Age: 33 Posts: 1,352 Trader Rating: (1) Feedback Score: 1 reviews	Check MAF msglngthfkdarules

11-17-2012, 08:19 PM	#3
hoytt123 Leaky Injector Join Date: Mar 2012 Location: Minnesota Posts: 69 Trader Rating: (1) Feedback Score: 1 reviews	okay could it just be my airfilter being cloughed i have some janky mushroom like sponge filter that came with the car on it now

11-17-2012, 08:32 PM	#4
K3MPS Leaky Injector Join Date: Sep 2012 Location: Chino Hills, CA Age: 36 Posts: 72 Trader Rating: (1) Feedback Score: 1 reviews	what fuel pump are you running?

11-17-2012, 08:34 PM	#5
hoytt123 Leaky Injector Join Date: Mar 2012 Location: Minnesota Posts: 69 Trader Rating: (1) Feedback Score: 1 reviews	walbro 255 i believe, this has never happened before and i do mini pulls like everyday

11-19-2012, 06:47 PM	#10
Cedarcbr Leaky Injector Join Date: Sep 2007 Location: Cedar City Ut. Age: 38 Posts: 80 Trader Rating: (0) Feedback Score: 0 reviews	had pretty much this same issue today and it turned out the 2 of my plugs had hairline cracks in them after 3K miles, not sure how it happened but changed plugs and she runs like a champ now, just my 2 cents