spark plug scare!

[WazR32GTSt]

I have had a slight 'miss' for quite some time, only at idle and very random... have narrowed it down to coil packs or O2 sensor.

on sunday i decided it was time for a plug change and at the same time i thought could check the resistance of my coil packs to see their state of health. and see if it could be the culprit of my miss.

went down to supercheap and bought 6 plugs (NGK: BCPR6ES - 0.8mm gap) that are the exact same ones as were already in the car.

so... only took about 1 hour - took off the intake pipe that runs over the cam covers, took off the required hoses, loostened the required clamps etc.

came to the plugs... took off one coil pack at a time, checked the resistances (all ended up being the same), chagned the plugs. upon inspection the plugs were absolutely great and didn't even need a change (that's copper plugs in for 10,000kms and counting)

Put it all back together... turned the key... NOTHING!

aaaaaaaaaaaaaaaarrrrrrrrrrrrrggggggggggghhhhhhhhhhhhh!!!

it cranked but wouldn't ignite!

checked all hoses for a massive leak - nothing

checked all the coil plugs - everything plugged in and ok

by now dad was pissed at me for "playing with your bloody car again" (hehe) but i was determined i hadn't stuffed anything. he thought that i had blown the ptu or something.

so, after a day of trying to diagnose the problem i thought stuff it, i'll just put the old plugs back in, after all they were the only thing that i had changed.

presto, car started first time!

wtf??!?!?!

what's the liklihood of getting 6 stuffed plugs? or is one completely stuffed plug good enough to not let the car even start and idle like crap?

I'm going to try and get a refund at supercheap but i can't lie as the tips of the plugs don't look new even with a clean since being exposed to fuel and the inside of my cylinders - might have to tell them the truth and risk not getting a refund.

well thought i'd share my odd and annoying experience and get some sympathy for wasting a day that i could have otherwise spent on the forum / with the missus / anywhere else really!

at least i can say that i have determined that it is most likely my O2 sensor that is causing my miss at idle.

anyone else have any odd experiences with their engine?

have good ones,

Warren.

[SKY031]

went down to supercheap and bought 6 plugs (NGK: BCPR6ES - 0.8mm gap) that are the exact same ones as were already in the car.

what's the liklihood of getting 6 stuffed plugs?

Just because they were the ones that were in there, doesn't mean they're the right ones.

http://www.skylinesaustralia.com/forums/sh...ead.php?t=32825

[WazR32GTSt]

Just because they were the ones that were in there, doesn't mean they're the right ones.  

http://www.skylinesaustralia.com/forums/sh...ead.php?t=32825

that link is to NA engines not turbo engines (i have an rb20det)

also, i know they are the right ones as when i bought the car it had crappy old plugs that needed a change badly and i put in the BCPR6ES with great success then...

[SKY031]

OK..... go have a look at what NGK has to say on the matter.

http://www.ngk.com.au/

1991.8 - 1993.8 NISSAN SKYLINE 2000 TURBO RB20DET

Spark Plug

Part No.

Recommended Plug

PFR6A-11

Iridium Option

BCPR6EIX-11

1989.5 - 1991.8 NISSAN SKYLINE 2000 TURBO RB20DET

Spark Plug

Part No.

Recommended Plug

PFR5A-11

Iridium Option

BCPR5EIX-11

[ferni]

http://www.skylinesaustralia.com/forums/sh...ead.php?t=38660

[KamikazeR33]

hahaha we put a new set of plugs in my car, drove it home, started it the next day n they r fcuked

i need a tune tho, its runnin mega rich

[WazR32GTSt]

OK..... go have a look at what NGK has to say on the matter.

http://www.ngk.com.au/  

1991.8 - 1993.8 NISSAN SKYLINE 2000 TURBO RB20DET

Spark Plug                

Part No.

Recommended Plug

PFR6A-11

Iridium Option              

BCPR6EIX-11

1989.5 - 1991.8 NISSAN SKYLINE 2000 TURBO RB20DET

Spark Plug                

Part No.

Recommended Plug

PFR5A-11

Iridium Option              

BCPR5EIX-11

isn't BCPR6ES-11 the exact same plug as the PFR6A-11 except copper instead of platinum...?

i think so... i chose the copper option for my own reasons

[JAPCAB]

bcpr6es with 0.8mm gap are good plugs for skylines, and even the bcpr7es if you want to go for the extra heat range - the 7's seem to respond well to boost. If you are getting an idling problem definately have a look at the o2 sensor, they are $99 to replace so pretty cheap. If you take out your o2 sensor and its got a nissan emblem on it definately change it because its probably the original one and they are only good for about 40thou kms. Other thing you can try is cleaning the afm with carby cleaner and cleaning the AAC. My skyline developed a spluttering rough idle and i was told it was a vacuum leak. I took off and cleaned every pipe and refitted all the hose clamps as tight as possible without wrecking the hose clamps ( sorry i actually wrecked about 2 hose clamps....its hard to know when to back off when tightening up those bastards! )replaced the o2 sensor, cleaned AFM, reset ECU, changed plugs and cleaned AAC and now it is fine and running a hell of a lot better. The good thing is that you can check this stuff yourself and do all this stuff in an afternoon.

[WazR32GTSt]

well as this has been a long-standing problem i have tried lots of stuff (most probably irrelevant to the problem, but hey i tried, right?):

- cleaning AAC valve

- cleaning AFM

- adjusting TPS

- re-grounding fuel pump

- cleaning carbon off the O2 sensor

- changing fuel filter

- reset ECU

- checked coil packs (although 'Roy' suggested this is better done when they are warm)

and for the record, the O2 sensor was an NGK one with the part number "0A08" on it...

Waz.

[paulr33]

i dont see how it could be the o2 sensor it wont affect idle or timinig. the 02 sensor gives feedback to the ecu to run lean when you aren;t on full throttle to save fuel it wont affect idle

[paulr33]

i was driving around with a dead o2 sensor for about 20,000 odd k's no idle problems or misfire, check crank angle sensor

[paulr33]

have u had your ecu checked for errors code by consult? that could be an easy way to tell

find someone who has the consult data cable

[paulr33]

i should get mine this week if you want me to come and help

[WazR32GTSt]

i have checked the ECU error codes in the diagnostic check but not via consult...

you have consult??

are you going to be at the dyno day on sunday?? i would love to plug my baby in and see what it comes up with...

[paulr33]

no i dont. i have ordered the data cable that plugs into the consult port and to a laptop so you can check error codes and stuff. i may get it this week. if i do ill bring it down with a laptop sure but dont like chances of getting the cable this week

[pushead]

same problem happen with me. incorrect plugs and car wouldn't start. double check your plugs dude.

[WazR32GTSt]

yeah that was the plugs - put the old ones back in (although same brand, same code) and it started first time!

[paulr33]

I have just recieved an email, my consult cable is on the way, express post from adelaide. I should have it by Thursday tops. Will bring it down on the weekend to dyno day if anyone would like a health check up

Assuming it all works fine of course

[paulr33]

Confirmed my consult cable has been posted. Will try and rig it up and test before sunday so i can bring down and do some health checking your r32 if you like

[paulr33]

data cable arrived today, will bring it down on the weekend