Car sounding lumpy and blew black smoke was idling up and down URGENT!!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

meen13 · 06-08-2011, 07:53 AM

Car is sounding lumpy as if a plug has gone .. Losing power then returning to normal except on higher revs.
blew black but has now stopped .. Still idling lumpy,power is up and down.
Help!

Nibras · 06-08-2011, 07:18 PM

check your spark plugs

meen13 · 06-08-2011, 08:18 PM

It sounds like only part of the idle is rough.
Cheers I will!

Fonix36 · 06-08-2011, 08:23 PM

vacuum leak possible as well

meen13 · 06-08-2011, 11:09 PM

How would you fix a vacuum leak?

JDMRIDDAZ · 06-08-2011, 11:33 PM

Quote:

Originally Posted by meen13

How would you fix a vacuum leak?

lol
did u check ur car....
u fix a vac leak by either cutting hose shorter
or replacing it completely
after u find it
with carb spray

meen13 · 06-08-2011, 11:42 PM

Another thought is I caught on something slightly backing out the other day, could it have pulled the intercooler forward a bit and loosened the air intake.
Would that be the response if that happened though?

meen13 · 06-08-2011, 11:46 PM

I went to check the plugs, 2 of the nuts for those covers screwed over the top of them are burred so I'm getting the mechanic to do that, but I'm thinking of other cases just in case.
Plus it helps me learn more about it.

JDMRIDDAZ · 06-08-2011, 11:57 PM

maybe.......
check it and answer bak

meen13 · 06-09-2011, 12:20 AM

Nah inter cooler and pipes from it are fine, I'll give a quick look over the hoses for safe measure I guess

meen13 · 06-09-2011, 12:57 AM

Hoses are all good,
It wouldn't start though, oil light came on sometimes during the attempts ..
Could it be a starter motor or something giving out or ignition unit?

meen13 · 06-09-2011, 12:59 AM

It's been running rough for a few seconds then idling perfect on start up since I've bought it.
I'm wondering too if it could be something to do with it

JDMRIDDAZ · 06-09-2011, 03:08 PM

uh the ign itself has problems in these cars my car i have to play with the key to get her to crank
did u check ecu for codes
also check hardtuned.net
and search

meen13 · 06-09-2011, 05:44 PM

Cheers, I'm getting someone to look at it today ... Gonna nail it on the head.. Yeah a rally club I'm in a guy said check "idle control unit"
Its been idling lumpy on very first start up for aporox 2seconds since I bought it.

meen13 · 06-09-2011, 09:08 PM

To catch you up on what's happening, its been diagnosed that it's an inconsistent current.
Whether it's the comp. Or just a connection gone bad I won't know til mid next week as she's locked away for the long weekend.

06-08-2011, 07:53 AM	#1
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Car sounding lumpy and blew black smoke was idling up and down URGENT!!!! Car is sounding lumpy as if a plug has gone .. Losing power then returning to normal except on higher revs. blew black but has now stopped .. Still idling lumpy,power is up and down. Help!

06-08-2011, 08:23 PM	#4
Fonix36 Nissanaholic! Join Date: Mar 2008 Location: southern cali Age: 34 Posts: 2,457 Trader Rating: (34) Feedback Score: 34 reviews	vacuum leak possible as well __________________ DRiFT 4 A Cure!

06-08-2011, 11:57 PM	#9
JDMRIDDAZ Zilvia Junkie Join Date: Sep 2007 Location: ｆォリダ Age: 47 Posts: 440 Trader Rating: (3) Feedback Score: 3 reviews	maybe....... check it and answer bak __________________ シチサｎ w/ka20det:in progress シチサｎw/sr20det:stolen

06-09-2011, 03:08 PM	#13
JDMRIDDAZ Zilvia Junkie Join Date: Sep 2007 Location: ｆォリダ Age: 47 Posts: 440 Trader Rating: (3) Feedback Score: 3 reviews	uh the ign itself has problems in these cars my car i have to play with the key to get her to crank did u check ecu for codes also check hardtuned.net and search __________________ シチサｎ w/ka20det:in progress シチサｎw/sr20det:stolen

06-08-2011, 07:18 PM	#2
Nibras Zilvia Junkie Join Date: Mar 2009 Location: Orlando , FL Age: 34 Posts: 450 Trader Rating: (2) Feedback Score: 2 reviews	check your spark plugs

06-08-2011, 08:18 PM	#3
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	It sounds like only part of the idle is rough. Cheers I will!

06-08-2011, 11:09 PM	#5
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	How would you fix a vacuum leak?

06-08-2011, 11:42 PM	#7
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Another thought is I caught on something slightly backing out the other day, could it have pulled the intercooler forward a bit and loosened the air intake. Would that be the response if that happened though?

06-08-2011, 11:46 PM	#8
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	I went to check the plugs, 2 of the nuts for those covers screwed over the top of them are burred so I'm getting the mechanic to do that, but I'm thinking of other cases just in case. Plus it helps me learn more about it.

06-09-2011, 12:20 AM	#10
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Nah inter cooler and pipes from it are fine, I'll give a quick look over the hoses for safe measure I guess

06-09-2011, 12:57 AM	#11
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Hoses are all good, It wouldn't start though, oil light came on sometimes during the attempts .. Could it be a starter motor or something giving out or ignition unit?

06-09-2011, 12:59 AM	#12
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	It's been running rough for a few seconds then idling perfect on start up since I've bought it. I'm wondering too if it could be something to do with it

06-09-2011, 05:44 PM	#14
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Cheers, I'm getting someone to look at it today ... Gonna nail it on the head.. Yeah a rally club I'm in a guy said check "idle control unit" Its been idling lumpy on very first start up for aporox 2seconds since I bought it.

06-09-2011, 09:08 PM	#15
meen13 BANNED Join Date: Jun 2011 Location: Australia Age: 46 Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	To catch you up on what's happening, its been diagnosed that it's an inconsistent current. Whether it's the comp. Or just a connection gone bad I won't know til mid next week as she's locked away for the long weekend.