I think I blew the motor SR redtop - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

mugenworks247 · 11-09-2010, 05:03 PM

So lemme give you a little history on my recent tune.

I just installed 370cc injectors from 550s that were in my car. I've been driving around on them for about one week with no issues.

I took the car out for a spirited drive with no issues. When I went back out to start the car, it wouldn't start. Cranked over fine but still no start. I gave it some throttle and it started up but I had to force it. I opened the hood and I had what sounded like and looked like a misfire.

Because of the swap of the injectors, I went back to the injectors and did a injector balance test to see if the problem changed when I disconnected them. I disconnected #2 and the engine smoothed out and there was no issues. I plugged it back in and the engine sounded bad again. I drove my g/f to work and i was getting backfires once i got off the throttle. The miss was getting worse.

I drove it over my friends so we could troubleshoot. Once it sat for a while and we tried to figure it out I started it again but this time a terrible vibration from the engine all the way home. The oil smells like fuel and i'm really hoping its not bearings or cylinder walls.

Please please someone shed some bright light on me?!

mugenworks247 · 11-09-2010, 05:38 PM

Ok so I know its not a mechanical issue, I drove it home with a clip very loose. It still had to be put in clear flood mode (pedal to the floor) to start it and it has a vibration that isn't very healthy. I'm going to check compression and spark tommorow. If they both look good i'm going to check the injectors (maybe send them out to get flow tested)

Rabboni · 11-09-2010, 05:44 PM

It sounds to me like you have a leaking, or stuck open injector. Try swapping it over to another cylinder and see if the problem follows. Also, try removing the fuel rail and cranking so you can watch the injector firing, and spray patterns.

Def · 11-09-2010, 07:09 PM

Is the ECU tuned for the 370s vs. the 550s that were in there?

dgomez · 11-09-2010, 07:37 PM

def sounds like tuning to me but i could be wrong

s14freak93901 · 11-09-2010, 08:38 PM

if your ecu even tuned for 370's in the first place?

mugenworks247 · 11-10-2010, 02:35 PM

Its a remanufactured red top ecu from nissan so its stock. . . I found some interesting things today. I think the injectors that I swapped with a member on zilvia is stuck open. I let it sit from last night around 6 to around 3:30 today and I pulled the plugs. All the plugs other than #2 (the one I had the issue with) are dry but #2 is black and wet. Its been sitting or a while and when I got it running, it still had a slight vibration. I took it around the block and idle got much worse. All the injectors are firing so I know its not my wiring. Anyone know what I should do?

mugenworks247 · 11-10-2010, 02:40 PM

My oil also smells like fuel

Rabboni · 11-10-2010, 04:13 PM

Quote:

Originally Posted by Rabboni

It sounds to me like you have a leaking, or stuck open injector. Try swapping it over to another cylinder and see if the problem follows. Also, try removing the fuel rail and cranking so you can watch the injector firing, and spray patterns.

That is what you should.

Leroy_Stickshift · 11-10-2010, 05:30 PM

if you suspect you've shot the engine, do a compression test. it will eliminate or confirm any speculation, i cant say much for the injectors, i haven't had any issues myself yet

Martino · 11-10-2010, 07:47 PM

Sounds like my old KA-T...flooded the walls with gas.

Bye bye cylinder 2 and 3.

mugenworks247 · 11-10-2010, 08:42 PM

yea also gettin really bad backfires when off the throttle. every other cylinder besides 2 is good maybe i'll swap tomorrow if its nice out thanks guys

*blksylv* · 11-10-2010, 10:12 PM

i had this same prob except i had white smoke pouring out of my exhaust, checked injectors and #1 was missing an o ring. replaced that, changed the oil and car ran fine..its more than likely an injector/o ring

mugenworks247 · 11-11-2010, 09:02 AM

someone made the recommendation that I installed the injector incorrectly but it seems like i did everything to spec. Also they told me not to use lubrication on the orings (which I didn't) and try reinstalling them.

11-09-2010, 05:44 PM	#3
Rabboni Zilvia Member Join Date: Aug 2009 Location: Fairfield, CA Posts: 230 Trader Rating: (0) Feedback Score: 0 reviews	It sounds to me like you have a leaking, or stuck open injector. Try swapping it over to another cylinder and see if the problem follows. Also, try removing the fuel rail and cranking so you can watch the injector firing, and spray patterns. __________________ Baling Wire-The Duct Tape Of Champions

11-09-2010, 07:09 PM	#4
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	Is the ECU tuned for the 370s vs. the 550s that were in there? __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

11-10-2010, 07:47 PM	#11
Martino Zilvia FREAK! Join Date: Mar 2008 Location: Toronto, Canada Posts: 1,000 Trader Rating: (8) Feedback Score: 8 reviews	Sounds like my old KA-T...flooded the walls with gas. Bye bye cylinder 2 and 3. __________________ IG: @vsMARTINO

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11-09-2010, 05:03 PM	#1
mugenworks247 Leaky Injector Join Date: Dec 2007 Location: Exeter PA Age: 33 Posts: 127 Trader Rating: (1) Feedback Score: 1 reviews	I think I blew the motor SR redtop So lemme give you a little history on my recent tune. I just installed 370cc injectors from 550s that were in my car. I've been driving around on them for about one week with no issues. I took the car out for a spirited drive with no issues. When I went back out to start the car, it wouldn't start. Cranked over fine but still no start. I gave it some throttle and it started up but I had to force it. I opened the hood and I had what sounded like and looked like a misfire. Because of the swap of the injectors, I went back to the injectors and did a injector balance test to see if the problem changed when I disconnected them. I disconnected #2 and the engine smoothed out and there was no issues. I plugged it back in and the engine sounded bad again. I drove my g/f to work and i was getting backfires once i got off the throttle. The miss was getting worse. I drove it over my friends so we could troubleshoot. Once it sat for a while and we tried to figure it out I started it again but this time a terrible vibration from the engine all the way home. The oil smells like fuel and i'm really hoping its not bearings or cylinder walls. Please please someone shed some bright light on me?!

11-09-2010, 05:38 PM	#2
mugenworks247 Leaky Injector Join Date: Dec 2007 Location: Exeter PA Age: 33 Posts: 127 Trader Rating: (1) Feedback Score: 1 reviews	Ok so I know its not a mechanical issue, I drove it home with a clip very loose. It still had to be put in clear flood mode (pedal to the floor) to start it and it has a vibration that isn't very healthy. I'm going to check compression and spark tommorow. If they both look good i'm going to check the injectors (maybe send them out to get flow tested)

11-09-2010, 07:37 PM	#5
dgomez Leaky Injector Join Date: Apr 2009 Location: Norwalk CA Age: 31 Posts: 101 Trader Rating: (2) Feedback Score: 2 reviews	def sounds like tuning to me but i could be wrong

11-09-2010, 08:38 PM	#6
s14freak93901 Zilvia Member Join Date: Apr 2005 Location: salinas,ca-fort bragg,nc Age: 32 Posts: 203 Trader Rating: (0) Feedback Score: 0 reviews	if your ecu even tuned for 370's in the first place?

11-10-2010, 02:35 PM	#7
mugenworks247 Leaky Injector Join Date: Dec 2007 Location: Exeter PA Age: 33 Posts: 127 Trader Rating: (1) Feedback Score: 1 reviews	Its a remanufactured red top ecu from nissan so its stock. . . I found some interesting things today. I think the injectors that I swapped with a member on zilvia is stuck open. I let it sit from last night around 6 to around 3:30 today and I pulled the plugs. All the plugs other than #2 (the one I had the issue with) are dry but #2 is black and wet. Its been sitting or a while and when I got it running, it still had a slight vibration. I took it around the block and idle got much worse. All the injectors are firing so I know its not my wiring. Anyone know what I should do?

11-10-2010, 02:40 PM	#8
mugenworks247 Leaky Injector Join Date: Dec 2007 Location: Exeter PA Age: 33 Posts: 127 Trader Rating: (1) Feedback Score: 1 reviews	My oil also smells like fuel

11-10-2010, 05:30 PM	#10
Leroy_Stickshift Join Date: Sep 2010 Location: Lower mainland Age: 35 Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	if you suspect you've shot the engine, do a compression test. it will eliminate or confirm any speculation, i cant say much for the injectors, i haven't had any issues myself yet

11-10-2010, 08:42 PM	#12
mugenworks247 Leaky Injector Join Date: Dec 2007 Location: Exeter PA Age: 33 Posts: 127 Trader Rating: (1) Feedback Score: 1 reviews	yea also gettin really bad backfires when off the throttle. every other cylinder besides 2 is good maybe i'll swap tomorrow if its nice out thanks guys

11-11-2010, 09:02 AM	#14
mugenworks247 Leaky Injector Join Date: Dec 2007 Location: Exeter PA Age: 33 Posts: 127 Trader Rating: (1) Feedback Score: 1 reviews	someone made the recommendation that I installed the injector incorrectly but it seems like i did everything to spec. Also they told me not to use lubrication on the orings (which I didn't) and try reinstalling them.