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

spartanmisfit · 09-07-2008, 07:07 PM

Well this all stems back about 2 months ago. My car was boggin really bad when in full boost. So I bought some new spark plugs bkr6e's or whatever and the car ran fine. Shortly afterwards I put in a manual boost controller because my avcr broke and turned the boost up to 13 lbs. Then I went out and bought some ngk bkr7i's or whatever and dedcided to put them in when I burned the 6's up. So it finally started boggin again this past week so I put in the iridiums today. Well when I took it out for a test drive it was horrible. Even worse than the first time. It runs fine when not under boost but when under full boost it's really bad. when I turn the boost down to around 7 lbs it's a little better but it still does it a little. any ideas?

BiG MiKE86 · 09-07-2008, 08:05 PM

What mods do you have? What are you using to tune? FPR? Air/Fuel Ratios? What color were the spark plugs u pulled? White? Brown? Black/Fouled?

nis-son · 09-07-2008, 08:09 PM

how is the bogging cause i think my car might have the same problem. is the bogging like when your on full throttle it just stops and doesnt wanna go any furthur.

spartanmisfit · 09-07-2008, 08:22 PM

i have a sr20 that i got with a greddy turbo greddy fmic, ive got an safc, koyo radiator, electronic fans. the plugs didnt look bad other than orange climbing up the white near where it says NGKR. Also yes it boggs when at full throttle. At first i thought it was a boost leak prolly through the fmic, but it's all fine. I'm pretty sure it has to be the spark plugs. oh and I have an hks turbo timer.

Addicted2Kouki · 09-07-2008, 08:27 PM

What did you gap the plugs to?

spartanmisfit · 09-07-2008, 09:20 PM

I was told not to gap them

Addicted2Kouki · 09-07-2008, 09:45 PM

Well, what is the gap at now?

spartanmisfit · 09-07-2008, 10:18 PM

shit, i dunno.

spartanmisfit · 09-07-2008, 10:19 PM

my friend keeps tellin me it's prolly my c.a.s. Any thoughts on that?

slideways2004 · 09-07-2008, 10:25 PM

every time i bought ngk bkr's, i had to re-gap them. b/c most of the time they are gapped for n/a cars. check your gap

nis-son · 09-07-2008, 10:36 PM

does your car shut off at idle when u had those bad spark plugs in?

drftthatshit · 09-08-2008, 11:22 AM

gap your plugs to 32thousands and you should be fine go to pepboys spend 1.00 for a spark plug gapr and then see what it does dipshit

Sileighty_85 · 09-08-2008, 11:59 AM

Gap the Plugs, Your probably blowing out your spark in boost

s15specR · 09-08-2008, 12:30 PM

I've read that you regap the plugs to .40 or .44 from the out of the box .32 ? Is that incorrect ?

spartanmisfit · 09-12-2008, 06:55 PM

well the problems gotten even worse. I took it to a friend of mine after going through 4 sets of spark plugs which blew immediately after i entered full boost. The plugs turn a deep red color immediately. Iridiums, V plugs and bkr7es, oh and bkr6es. But I never gapped any. It runs fine at idle and under low boost. But regardless of where my psi is at full boost it shits on me. My mechanic / friend thinks it's a boost leak, but I can't find it. He wants to hook it up to a ait hose and find it but he's been too busy. I checked all of my intercooler piping and I cant find a leak. When my car was running fine I never gapped the plugs either so I'm pretty stumped. How do I tinker with the cas if I should?

stupid nissan · 09-12-2008, 07:00 PM

well did you gap them? if not try that that way it is one less thing it could be.

spartanmisfit · 09-12-2008, 07:28 PM

Nope, the guy who sold the car to me keeps tellin me not to gap them but screw that. I'll get some new ones tomorrow and gap them and tell everyone how they did. I really hope that's the case.

spartanmisfit · 09-13-2008, 08:58 AM

I'm going to try gapping the first set at .028. If that doesnt work does anyone have any suggestions for a better gap. I'm runnin a red top with a greddy turbo, greddy fmic, koyo radiator and electric fans. And I like to drive at about 12-14 psi

blackej7 · 09-13-2008, 09:13 AM

Quote:

Originally Posted by spartanmisfit

Nope, the guy who sold the car to me keeps tellin me not to gap them

Stop listening to the guy who sold you the car.

oh, and check and see if your throwing any codes.

BiG MiKE86 · 09-13-2008, 09:44 AM

Can Iridiums be gapped?

spartanmisfit · 09-13-2008, 09:54 AM

Well it's still doing it at .025. I cant even tell how many pounds of boost im runnin, but it should be around 13

SoSideways · 09-13-2008, 10:58 AM

Quote:

Originally Posted by spartanmisfit

I'm going to try gapping the first set at .028. If that doesnt work does anyone have any suggestions for a better gap. I'm runnin a red top with a greddy turbo, greddy fmic, koyo radiator and electric fans. And I like to drive at about 12-14 psi

So you're running a bigger turbo at 13psi and don't have any kind of engine management done?

Do you know what your base timing is at?

Honestly, you seem pretty clueless about what you have, and what your engine can/cannot do... you might want to learn a bit more about it before you go blindly turning the boost up and blowing it up, then blaming Nissan for shitty motors, when it was the owner who was being shitty.

Don't be that guy.

spartanmisfit · 09-13-2008, 03:02 PM

Ok, first of all I'm not blaming nissan for anyhting. I love my car. 2nd of all yes I'm pretty clueless but that's what 4 1/2 years in prison does to a person. Alot of time I missed out on working on cars.That's why I'm on here, because I don't know everything obviously. Obviously I bought the car with most of the work done to it. Oh and I have an SAFC unit and an HKS turbo timer not that the turbo timer would have anyhting to do with this. Does anyone know approx. which setting I should set on my SAFC?

spartanmisfit · 09-13-2008, 03:26 PM

Well I found a boost leak. There were a couple of holes in the intercooler piping where it leaves the engine bay where the battery use to sit. So we fixed it and I took it out for a run. It runs WAAAY better in first and 2nd gear. It still bogs down a little but not nearly as much. 3rd and higher gears are better but not as bad as it was. I couldnt find any other leak so I don't know if it's because I already fouled my plugs out or whatever elseit might be. I'm still wondering if it's my timing or CAS. I'm going to change my plugs again today when the rain slows down again and hopefully that does it.

aNskY · 09-13-2008, 04:13 PM

if you gapped your plugs down to .025 and its still breaking up, its not the gap. that should be undersized gap for 13psi, you could probably bring it back to ~.030 and maybe bigger, safely

spartanmisfit · 09-13-2008, 04:25 PM

it was originally at .035

drftthatshit · 09-13-2008, 07:03 PM

stay at .35 or try .32

spartanmisfit · 09-13-2008, 07:57 PM

alright thanks. I'll try that tomorrow.

spartanmisfit · 09-14-2008, 11:02 AM

Here's some pics of the spark plugs

http://i302.photobucket.com/albums/n...t/DSC00984.jpg"

http://i302.photobucket.com/albums/n...t/DSC00985.jpg

http://i302.photobucket.com/albums/n...t/DSC00987.jpg

http://i302.photobucket.com/albums/n...t/DSC00986.jpg

These are only one day worth of use too. Also prior to the boost leak, but I havnt been able to get those plugs replaced yet.

UNISA JECS · 09-14-2008, 11:12 AM

Looks like rust on the spark plugs, looks like water entering the combustion chamber.

09-07-2008, 07:07 PM	#1
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	spark plugs... again Well this all stems back about 2 months ago. My car was boggin really bad when in full boost. So I bought some new spark plugs bkr6e's or whatever and the car ran fine. Shortly afterwards I put in a manual boost controller because my avcr broke and turned the boost up to 13 lbs. Then I went out and bought some ngk bkr7i's or whatever and dedcided to put them in when I burned the 6's up. So it finally started boggin again this past week so I put in the iridiums today. Well when I took it out for a test drive it was horrible. Even worse than the first time. It runs fine when not under boost but when under full boost it's really bad. when I turn the boost down to around 7 lbs it's a little better but it still does it a little. any ideas?

09-07-2008, 08:05 PM	#2
BiG MiKE86 Nissanaholic! Join Date: Mar 2007 Location: Ft. Lauderdale Age: 35 Posts: 1,776 Trader Rating: (12) Feedback Score: 12 reviews	What mods do you have? What are you using to tune? FPR? Air/Fuel Ratios? What color were the spark plugs u pulled? White? Brown? Black/Fouled? __________________

09-08-2008, 11:59 AM	#13
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Gap the Plugs, Your probably blowing out your spark in boost __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

09-08-2008, 12:30 PM	#14
s15specR Zilvia FREAK! Join Date: Oct 2007 Location: USA Posts: 1,021 Trader Rating: (18) Feedback Score: 18 reviews	I've read that you regap the plugs to .40 or .44 from the out of the box .32 ? Is that incorrect ? __________________

09-12-2008, 07:00 PM	#16
stupid nissan Join Date: Jan 2008 Location: san antonio Age: 39 Posts: 42 Trader Rating: (0) Feedback Score: 0 reviews	well did you gap them? if not try that that way it is one less thing it could be. __________________ that is simple logic, fuck physics

09-07-2008, 08:09 PM	#3
nis-son Leaky Injector Join Date: Apr 2008 Location: queens ny Age: 31 Posts: 89 Trader Rating: (0) Feedback Score: 0 reviews	how is the bogging cause i think my car might have the same problem. is the bogging like when your on full throttle it just stops and doesnt wanna go any furthur.

09-07-2008, 08:22 PM	#4
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	i have a sr20 that i got with a greddy turbo greddy fmic, ive got an safc, koyo radiator, electronic fans. the plugs didnt look bad other than orange climbing up the white near where it says NGKR. Also yes it boggs when at full throttle. At first i thought it was a boost leak prolly through the fmic, but it's all fine. I'm pretty sure it has to be the spark plugs. oh and I have an hks turbo timer.

09-07-2008, 09:20 PM	#6
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	I was told not to gap them

09-07-2008, 10:18 PM	#8
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	shit, i dunno.

09-07-2008, 10:19 PM	#9
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	my friend keeps tellin me it's prolly my c.a.s. Any thoughts on that?

09-07-2008, 10:25 PM	#10
slideways2004 Nissanaholic! Join Date: Apr 2005 Location: Houston Age: 35 Posts: 1,706 Trader Rating: (6) Feedback Score: 6 reviews	every time i bought ngk bkr's, i had to re-gap them. b/c most of the time they are gapped for n/a cars. check your gap

09-07-2008, 10:36 PM	#11
nis-son Leaky Injector Join Date: Apr 2008 Location: queens ny Age: 31 Posts: 89 Trader Rating: (0) Feedback Score: 0 reviews	does your car shut off at idle when u had those bad spark plugs in?

09-08-2008, 11:22 AM	#12
drftthatshit Zilvia Member Join Date: Jul 2008 Location: fox lake Age: 33 Posts: 192 Trader Rating: (0) Feedback Score: 0 reviews	gap your plugs to 32thousands and you should be fine go to pepboys spend 1.00 for a spark plug gapr and then see what it does dipshit

09-12-2008, 06:55 PM	#15
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	well the problems gotten even worse. I took it to a friend of mine after going through 4 sets of spark plugs which blew immediately after i entered full boost. The plugs turn a deep red color immediately. Iridiums, V plugs and bkr7es, oh and bkr6es. But I never gapped any. It runs fine at idle and under low boost. But regardless of where my psi is at full boost it shits on me. My mechanic / friend thinks it's a boost leak, but I can't find it. He wants to hook it up to a ait hose and find it but he's been too busy. I checked all of my intercooler piping and I cant find a leak. When my car was running fine I never gapped the plugs either so I'm pretty stumped. How do I tinker with the cas if I should?

09-12-2008, 07:28 PM	#17
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	Nope, the guy who sold the car to me keeps tellin me not to gap them but screw that. I'll get some new ones tomorrow and gap them and tell everyone how they did. I really hope that's the case.

09-13-2008, 08:58 AM	#18
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	I'm going to try gapping the first set at .028. If that doesnt work does anyone have any suggestions for a better gap. I'm runnin a red top with a greddy turbo, greddy fmic, koyo radiator and electric fans. And I like to drive at about 12-14 psi

09-13-2008, 09:44 AM	#20
BiG MiKE86 Nissanaholic! Join Date: Mar 2007 Location: Ft. Lauderdale Age: 35 Posts: 1,776 Trader Rating: (12) Feedback Score: 12 reviews	Can Iridiums be gapped? __________________

09-13-2008, 09:54 AM	#21
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	Well it's still doing it at .025. I cant even tell how many pounds of boost im runnin, but it should be around 13

09-13-2008, 03:02 PM	#23
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	Ok, first of all I'm not blaming nissan for anyhting. I love my car. 2nd of all yes I'm pretty clueless but that's what 4 1/2 years in prison does to a person. Alot of time I missed out on working on cars.That's why I'm on here, because I don't know everything obviously. Obviously I bought the car with most of the work done to it. Oh and I have an SAFC unit and an HKS turbo timer not that the turbo timer would have anyhting to do with this. Does anyone know approx. which setting I should set on my SAFC?

09-13-2008, 03:26 PM	#24
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	Well I found a boost leak. There were a couple of holes in the intercooler piping where it leaves the engine bay where the battery use to sit. So we fixed it and I took it out for a run. It runs WAAAY better in first and 2nd gear. It still bogs down a little but not nearly as much. 3rd and higher gears are better but not as bad as it was. I couldnt find any other leak so I don't know if it's because I already fouled my plugs out or whatever elseit might be. I'm still wondering if it's my timing or CAS. I'm going to change my plugs again today when the rain slows down again and hopefully that does it.

09-13-2008, 04:13 PM	#25
aNskY Nissanaholic! Join Date: Apr 2005 Location: NY Age: 37 Posts: 1,604 Trader Rating: (10) Feedback Score: 10 reviews	if you gapped your plugs down to .025 and its still breaking up, its not the gap. that should be undersized gap for 13psi, you could probably bring it back to ~.030 and maybe bigger, safely

09-13-2008, 04:25 PM	#26
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	it was originally at .035

09-13-2008, 07:03 PM	#27
drftthatshit Zilvia Member Join Date: Jul 2008 Location: fox lake Age: 33 Posts: 192 Trader Rating: (0) Feedback Score: 0 reviews	stay at .35 or try .32

09-13-2008, 07:57 PM	#28
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	alright thanks. I'll try that tomorrow.

09-14-2008, 11:02 AM	#29
spartanmisfit Zilvia FREAK! Join Date: Jul 2008 Location: East Lansing, Michigan Posts: 1,332 Trader Rating: (18) Feedback Score: 18 reviews	Here's some pics of the spark plugs http://i302.photobucket.com/albums/n...t/DSC00984.jpg" http://i302.photobucket.com/albums/n...t/DSC00985.jpg http://i302.photobucket.com/albums/n...t/DSC00987.jpg http://i302.photobucket.com/albums/n...t/DSC00986.jpg These are only one day worth of use too. Also prior to the boost leak, but I havnt been able to get those plugs replaced yet.

09-14-2008, 11:12 AM	#30
UNISA JECS Nissanaholic! Join Date: Feb 2007 Location: Socal Fontana Age: 42 Posts: 2,372 Trader Rating: (40) Feedback Score: 40 reviews	Looks like rust on the spark plugs, looks like water entering the combustion chamber. __________________ PARTS 4 SALE !! Z32 E-Brake/Parking Brake Heatshield Assemblys!!! *Rep/Feedbacks*

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