engine misfiring when hot - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*s0apgun* · 05-05-2009, 10:40 AM

don't have much time to explain it have to go take a final

but when i got the car in october it did this too then it went away once winter started

now today it came back

seems to only happen when 70+ degrees out or the engine is really hot

bogs a bit at idle and misfires all the way through at operating temps

i thought it was a damaged boot before because i had a bad valve cover gasket which was damaging it and causing the spark to arc early

replaced that it wasn't doing anything STUPID anymore

but now its back

possible CTS?

don't think its fuel injectors because it was running fine in the winter

thanks for any help you can give me

i can provide more info later today

*s0apgun* · 05-05-2009, 05:20 PM

nothing???

wow

okay

new question

how the fuck can i get the rubber tip of the boot out that is stuck in my cylinder 3

tried fire and screwdriver

*ryguy* · 05-05-2009, 05:30 PM

Dental pick?

*s0apgun* · 05-05-2009, 05:32 PM

that is genius

i will try that

*s0apgun* · 05-05-2009, 05:34 PM

s13 ka24de

i took out all the plugs they all appear fine

i looked at all the pistons 1 2 & 4 are dry but 3 looked black and wet

does that mean that cylinder 3 is the one that is misfiring?

weissguy · 05-05-2009, 05:55 PM

Yes...covered in fuel and black. Check that injector.

*s0apgun* · 05-05-2009, 06:01 PM

it could also be my third ignition wire too

if that was bad i would still get the wet and black cylinder right?

steve shadows · 05-05-2009, 08:53 PM

No...

If you had a bad O ring it would be leaking.

If you had bad connection on one cylinder it would be dry...

*ryguy* · 05-06-2009, 12:37 AM

Quote:

Originally Posted by steve shadows

No...

If you had a bad O ring it would be leaking.

If you had bad connection on one cylinder it would be dry...

If the plug wire on cyl 3 was bad, wouldn't the plug be wet?

*s0apgun* · 05-06-2009, 01:20 PM

steve told me that it makes a circuit

so the injector is probably bad

going to test it with an ohm meter

ryan you have any extra injectors laying around hahha

*s0apgun* · 05-06-2009, 02:05 PM

pretty sure third injector is out

i unplugged all of them and nothing happened when i took out the third

same thing happens when i take out the third plug nothing

and the top of the piston head is black and wet

doesn't really explain why it only started happening when it got warm out ?

05-05-2009, 10:40 AM	#1
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	engine misfiring when hot don't have much time to explain it have to go take a final but when i got the car in october it did this too then it went away once winter started now today it came back seems to only happen when 70+ degrees out or the engine is really hot bogs a bit at idle and misfires all the way through at operating temps i thought it was a damaged boot before because i had a bad valve cover gasket which was damaging it and causing the spark to arc early replaced that it wasn't doing anything STUPID anymore but now its back possible CTS? don't think its fuel injectors because it was running fine in the winter thanks for any help you can give me i can provide more info later today __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

05-05-2009, 05:20 PM	#2
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	nothing??? wow okay new question how the fuck can i get the rubber tip of the boot out that is stuck in my cylinder 3 tried fire and screwdriver __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

05-05-2009, 05:30 PM	#3
ryguy Its all the governments fault. Join Date: Oct 2006 Location: Chicago Suburbs Age: 20 Posts: 1,509 Trader Rating: (4)	Dental pick? __________________

05-05-2009, 05:32 PM	#4
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	that is genius i will try that __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

05-05-2009, 05:34 PM	#5
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	s13 ka24de i took out all the plugs they all appear fine i looked at all the pistons 1 2 & 4 are dry but 3 looked black and wet does that mean that cylinder 3 is the one that is misfiring? __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

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05-05-2009, 05:55 PM	#6
weissguy Zilvia Member Join Date: Feb 2007 Location: dallas Posts: 260 Trader Rating: (0)	Yes...covered in fuel and black. Check that injector.

05-05-2009, 06:01 PM	#7
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	it could also be my third ignition wire too if that was bad i would still get the wet and black cylinder right? __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

05-05-2009, 08:53 PM	#8
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 7,591 Trader Rating: (3)	No... If you had a bad O ring it would be leaking. If you had bad connection on one cylinder it would be dry... __________________ SHADOWERKS.COM *Your PREMIER Zilvia Dyno AND* Remote Tuner...**

05-06-2009, 01:20 PM	#10
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	steve told me that it makes a circuit so the injector is probably bad going to test it with an ohm meter ryan you have any extra injectors laying around hahha __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

05-06-2009, 02:05 PM	#11
s0apgun d r i f t w o l r d Join Date: Apr 2007 Location: drilling oil on mars Posts: 5,769 Trader Rating: (14)	pretty sure third injector is out i unplugged all of them and nothing happened when i took out the third same thing happens when i take out the third plug nothing and the top of the piston head is black and wet doesn't really explain why it only started happening when it got warm out ? __________________ It's like going crazy when you're already nuts. driftwolrd \| blog \| stickers \| youtube

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