sohc no power, sounds like lawnmower - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

fcdrifer17 · 02-24-2006, 10:26 AM

my bro's car is running like crap.. in the morning it wouldnt start at all untill we swaped mafs then it started up but runs like crap.
here are the symthoms

car has perfect 800 rpm idle
sounds like a lawnmower
must have like 60 hp
blows blk smoke when reved
stays at the "cool" temp line all the time.
revs fine throughout all gears.
please let me know what you guys think. thanks

the head · 02-24-2006, 12:20 PM

Sounds like its not firing on all four pull plugs and check spark replace wires if necessary, also look for fouled plugs

fcdrifer17 · 02-24-2006, 01:23 PM

we replaced sparkplugs and oil already... there is spark since it shocked the crap outa me haha... maybe still bad mafs?

EchoOfSilence · 02-24-2006, 01:30 PM

check temp sensor, cat, maf

black smoke is a bad sign...

sblack13 · 02-24-2006, 04:09 PM

i had the same problem with a coupe i bought. I seriously had to floor it when i brought it home, and i was still going slow. I switched maf's it did nothing. It bogged like crazy. I did'nt even bother just swapped a lower milege ka in there.

infinitexsound · 02-24-2006, 04:19 PM

check compression......my best bet...

fcdrifer17 · 02-24-2006, 04:24 PM

damn this suxs... the car starts right up.. and when i rev it itll go up slowly with no hesiatation.

sblack13 · 02-24-2006, 04:33 PM

yes i forgot to mention compression was very low on the original motor i had in the car. Check your compression and get back to us.

Indolent · 02-24-2006, 08:17 PM

check your fuel injectors, usually it's either spark/fuel
-bad o rings possibly
sounds like you're fuel injectors are leaking, when mine leaked it sounded like a wrx and sounded like it was running on 3 cylinders

fcdrifer17 · 02-24-2006, 08:38 PM

the fuel injector squirt fuel right.. when they leak? no gas or anything around them.. im going to do a compression check asap

infinitexsound · 02-24-2006, 09:05 PM

if ur injectors are plugged.. which is possible.. all youd have to do is run by the junk yards and pull a few.... or... actually taking them to a denso injector service shop, thats roughly 20 bucks a piece for service... if ur leaking fuel youd obviously know... the smell of gas and the puddle of it in ur engine bay... which is very dangerous... check compression... then follow up on ur injectors..

Indolent · 02-24-2006, 09:21 PM

the way i checked my fuel leak was by unbolting the fuel rail, lifted it up, put the car on the acc position so fuel can be pumped, then looked at all 4 injectors, no1 was leaking horribly. just fyi, but i'm not sure if they squirt/spray or what not, wasn't really paying attention if it did or not

02-24-2006, 10:26 AM	#1
fcdrifer17 Leaky Injector Join Date: Oct 2005 Location: socal Posts: 142 Trader Rating: (0) Feedback Score: 0 reviews	sohc no power, sounds like lawnmower my bro's car is running like crap.. in the morning it wouldnt start at all untill we swaped mafs then it started up but runs like crap. here are the symthoms car has perfect 800 rpm idle sounds like a lawnmower must have like 60 hp blows blk smoke when reved stays at the "cool" temp line all the time. revs fine throughout all gears. please let me know what you guys think. thanks

02-24-2006, 12:20 PM	#2
the head Nissanaholic! Join Date: Jul 2002 Location: in a dark room mastering the art of typing with one hand Posts: 2,164 Trader Rating: (3) Feedback Score: 3 reviews	Sounds like its not firing on all four pull plugs and check spark replace wires if necessary, also look for fouled plugs __________________ I never knew you could do that with an eggplant

02-24-2006, 01:30 PM	#4
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	check temp sensor, cat, maf black smoke is a bad sign... __________________ Petition Nissan to Make the IDx on http://IDxClub.co !

02-24-2006, 04:19 PM	#6
infinitexsound Post Whore! Join Date: Sep 2003 Location: INtraweb Age: 42 Posts: 3,522 Trader Rating: (0) Feedback Score: 0 reviews	check compression......my best bet... __________________ S14 TrackSlut coming to a raceway near you... 510 TimeAttack on its way...

02-24-2006, 09:05 PM	#11
infinitexsound Post Whore! Join Date: Sep 2003 Location: INtraweb Age: 42 Posts: 3,522 Trader Rating: (0) Feedback Score: 0 reviews	if ur injectors are plugged.. which is possible.. all youd have to do is run by the junk yards and pull a few.... or... actually taking them to a denso injector service shop, thats roughly 20 bucks a piece for service... if ur leaking fuel youd obviously know... the smell of gas and the puddle of it in ur engine bay... which is very dangerous... check compression... then follow up on ur injectors.. __________________ S14 TrackSlut coming to a raceway near you... 510 TimeAttack on its way...

02-24-2006, 01:23 PM	#3
fcdrifer17 Leaky Injector Join Date: Oct 2005 Location: socal Posts: 142 Trader Rating: (0) Feedback Score: 0 reviews	we replaced sparkplugs and oil already... there is spark since it shocked the crap outa me haha... maybe still bad mafs?

02-24-2006, 04:09 PM	#5
sblack13 Zilvia FREAK! Join Date: May 2005 Location: Seattle Age: 38 Posts: 1,016 Trader Rating: (10) Feedback Score: 10 reviews	i had the same problem with a coupe i bought. I seriously had to floor it when i brought it home, and i was still going slow. I switched maf's it did nothing. It bogged like crazy. I did'nt even bother just swapped a lower milege ka in there.

02-24-2006, 04:24 PM	#7
fcdrifer17 Leaky Injector Join Date: Oct 2005 Location: socal Posts: 142 Trader Rating: (0) Feedback Score: 0 reviews	damn this suxs... the car starts right up.. and when i rev it itll go up slowly with no hesiatation.

02-24-2006, 04:33 PM	#8
sblack13 Zilvia FREAK! Join Date: May 2005 Location: Seattle Age: 38 Posts: 1,016 Trader Rating: (10) Feedback Score: 10 reviews	yes i forgot to mention compression was very low on the original motor i had in the car. Check your compression and get back to us.

02-24-2006, 08:17 PM	#9
Indolent Zilvia FREAK! Join Date: Jun 2005 Location: So. Cal, Riverside Area Posts: 1,110 Trader Rating: (3) Feedback Score: 3 reviews	check your fuel injectors, usually it's either spark/fuel -bad o rings possibly sounds like you're fuel injectors are leaking, when mine leaked it sounded like a wrx and sounded like it was running on 3 cylinders

02-24-2006, 08:38 PM	#10
fcdrifer17 Leaky Injector Join Date: Oct 2005 Location: socal Posts: 142 Trader Rating: (0) Feedback Score: 0 reviews	the fuel injector squirt fuel right.. when they leak? no gas or anything around them.. im going to do a compression check asap

02-24-2006, 09:21 PM	#12
Indolent Zilvia FREAK! Join Date: Jun 2005 Location: So. Cal, Riverside Area Posts: 1,110 Trader Rating: (3) Feedback Score: 3 reviews	the way i checked my fuel leak was by unbolting the fuel rail, lifted it up, put the car on the acc position so fuel can be pumped, then looked at all 4 injectors, no1 was leaking horribly. just fyi, but i'm not sure if they squirt/spray or what not, wasn't really paying attention if it did or not