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

oO0OthinkO0Oo · 03-22-2005, 08:27 AM

ok so on my last full tank of gas i got 200 miles... wot on the freeway makes a 10 foot trail of smoke out of my exhaust that is greyish...and everynow and then i get this wierd smell in the cabin of my car. i checked my coolant reservoir no oil as of yet, and i checked the outside of my headgasket and i don't see anything coming out. im assuming it's a piston ring. if you can help me to further diagnose this that would be awsome.
thanks

oO0OthinkO0Oo · 03-22-2005, 09:17 AM

.....0_o......

orion::S14 · 03-22-2005, 10:15 AM

Sounds like it's dumping too much fuel at WOT. Why would you suspect a ring? They VERY RARELY go bad on the KA...broken ring lands are not uncommon under boost, or nitrous...but the rings are stout.

Anyway, steps to correct the problem:

1) Tuneup?

2) Check TPS and/or MAF function.

3) Change O2 sensor

4) Check resistance value of coolant temp sensor.

Assuming the engine isn't "broken"...your answer lies within those 4 steps.

- Brian

oO0OthinkO0Oo · 03-22-2005, 11:05 AM

thanks alot ill look into that. haha i don't really know why i though piston ring, probabily because when i first had the problem while i was driving i though headgasket, then after not being able to find evidence of anything leaking out of my head, i just jumped to piston ring, eventhough there is no evidence, that i have seen, of oil in the coolant or overheating. also he engine has 130k so i though that that might be it. what sucks also is that the smoke doesn't happen consistantly, it's only happened 3 times. thanks for the leads though!!
are there any other factors that i should look at?

oO0OthinkO0Oo · 03-22-2005, 02:10 PM

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idlafie · 03-23-2005, 03:45 AM

Quote:

Originally Posted by oO0OthinkO0Oo

ok so on my last full tank of gas i got 200 miles... wot on the freeway makes a 10 foot trail of smoke out of my exhaust that is greyish...and everynow and then i get this wierd smell in the cabin of my car. i checked my coolant reservoir no oil as of yet, and i checked the outside of my headgasket and i don't see anything coming out. im assuming it's a piston ring. if you can help me to further diagnose this that would be awsome.
thanks

Stick or Auto??

If it's stick then check the rubber shifter boot gasket. It could have a tear in it allowing whatever engine smells to permeate into the cabin.

ID

oO0OthinkO0Oo · 03-23-2005, 01:10 PM

it's a stick, but i have the b&m shifter so i don't think thats it but ill check it out anyways, thanks!

03-22-2005, 08:27 AM	#1
oO0OthinkO0Oo Leaky Injector Join Date: Jul 2002 Location: Southern Cali Age: 41 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	diagnosis help KA ok so on my last full tank of gas i got 200 miles... wot on the freeway makes a 10 foot trail of smoke out of my exhaust that is greyish...and everynow and then i get this wierd smell in the cabin of my car. i checked my coolant reservoir no oil as of yet, and i checked the outside of my headgasket and i don't see anything coming out. im assuming it's a piston ring. if you can help me to further diagnose this that would be awsome. thanks __________________ .::kris::.

03-22-2005, 09:17 AM	#2
oO0OthinkO0Oo Leaky Injector Join Date: Jul 2002 Location: Southern Cali Age: 41 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	.....0_o...... __________________ .::kris::.

03-22-2005, 10:15 AM	#3
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	Sounds like it's dumping too much fuel at WOT. Why would you suspect a ring? They VERY RARELY go bad on the KA...broken ring lands are not uncommon under boost, or nitrous...but the rings are stout. Anyway, steps to correct the problem: 1) Tuneup? 2) Check TPS and/or MAF function. 3) Change O2 sensor 4) Check resistance value of coolant temp sensor. Assuming the engine isn't "broken"...your answer lies within those 4 steps. - Brian __________________ www.KA24DEvelopment.com

03-22-2005, 11:05 AM	#4
oO0OthinkO0Oo Leaky Injector Join Date: Jul 2002 Location: Southern Cali Age: 41 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	thanks alot ill look into that. haha i don't really know why i though piston ring, probabily because when i first had the problem while i was driving i though headgasket, then after not being able to find evidence of anything leaking out of my head, i just jumped to piston ring, eventhough there is no evidence, that i have seen, of oil in the coolant or overheating. also he engine has 130k so i though that that might be it. what sucks also is that the smoke doesn't happen consistantly, it's only happened 3 times. thanks for the leads though!! are there any other factors that i should look at? __________________ .::kris::.

03-22-2005, 02:10 PM	#5
oO0OthinkO0Oo Leaky Injector Join Date: Jul 2002 Location: Southern Cali Age: 41 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	______________0_o______________ __________________ .::kris::.

03-23-2005, 01:10 PM	#7
oO0OthinkO0Oo Leaky Injector Join Date: Jul 2002 Location: Southern Cali Age: 41 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	it's a stick, but i have the b&m shifter so i don't think thats it but ill check it out anyways, thanks! __________________ .::kris::.