zx12richard
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posted December 11, 2009 12:13 PM
2000 ZX12 injector question
What are they?? flow rate and brand and stuff?? Also can they be purchased seperately and where?? And how much do they run. Basically looking to learn all about them. Thanxxx in advance.
  
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Texas12R
Zone Head
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posted December 11, 2009 12:54 PM
I bet Karl has piles of data
Jim
Scott
you might hit the dragbike zone
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zx12richard
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posted December 11, 2009 02:55 PM
 Edited By: zx12richard on 11 Dec 2009 22:56
I got an issue and it makes me think injector not right or one of the two air pressure sensors.
What the bike does is on cold starts it acts like it has a fouled plug, down on a cyclinder and as you ride motor gets warm it comes back and runs fine rest of day..
Brand new plugs two sets. My thought is an injector flooding a cylinder but someone else had similer problem said it was one of the sensors.. To high to just buyem new not knowing for sure.
One mounts close to tps to frame underside other is in the tail.
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Texas12R
Zone Head
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posted December 12, 2009 03:06 AM
Sorry Richard . I thought that would get it done
???
I'll see if I can find any info
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entropy
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posted December 12, 2009 06:01 AM
Hey Richard,
I dunno what the answer is to yr problem, but I can send/loan you a set of good OEM injectors to test with. I can also send you an air temp sensor(goes in the rh airbox inspection cover)
If you want to do the injector test, email your shipping address to guntekd@chevron.com.
Yr issues don't sound like bad air pressure sensors; have you checked the ECU for faults? A bad pressure sensor should show up.
lemme know
Karl
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zx12richard
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posted December 12, 2009 07:02 AM
Havent checked ecu for faults I try to avoid bike shops since the want 70 bucks an hour. Normally try to hit the boards for opinions. They are normally better than the shops advice.
Bike acts just like a two stroke fouling a plug then when motor heats up you feel the cylinder just come on and its good for the day after that. Thats why i suspect injector flooding cylinder or not working at all cause gummed up and heat frees it, I dont technically know how they work just my line of thoughtl
I really really appreciate the offer on loan of injectors but I prolly just send the MPSracing and spend the 100 on having them cleaned. After all they never been out since bike was new.
Thanks again for the imput and the offer. If cleaning doesnt work I may try to take you up on the sensor.
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aliveagain
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posted December 13, 2009 07:45 AM
quote:
I got an issue and it makes me think injector not right or one of the two air pressure sensors.
What the bike does is on cold starts it acts like it has a fouled plug, down on a cyclinder and as you ride motor gets warm it comes back and runs fine rest of day..
Brand new plugs two sets. My thought is an injector flooding a cylinder but someone else had similer problem said it was one of the sensors.. To high to just buyem new not knowing for sure.
One mounts close to tps to frame underside other is in the tail.
So it repeats this symptom with brand new plugs?
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zx12richard
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posted December 13, 2009 08:17 AM
Yes two sets. Only does it on cold starts such as 50 degrees or lower. Bike sat a long time a year or so ago and I didn't use stabilize or anything. It just like its down a cylinder till its warm then you can literally feel the cylinder come back.
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zx12richard
Pro
The Green Monster..
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posted December 13, 2009 08:27 AM
Can the injectors be removed without removing the tb and velocity stacks?? My stacks been in forever not sure wher I'd ever find new orings.
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entropy
Moderator
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posted December 13, 2009 04:00 PM
to remove injectors, gotta remove tank cover, stacks, disconnect fuel lines, injector harness plug, vacuum line to MAP sensor, throttle & idle cables, loosen clamps on boots, then TB's come out from rh side. not that big a deal, maybe 30 min, maybe an hour if you run out of beer or cigs.
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zx12richard
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posted December 13, 2009 04:43 PM
Was afraid of that. Anyone know a source for orings??? Can they be found at autozone or anywhere. Thnaks again guys.
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KZScott
Needs a life
high on speed
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posted December 13, 2009 06:59 PM
o rings for bear stacks? contact vh, they are supposed to be free if you need replacements
im thinking something is messing up the coolant temp sensor?(wild guess) you did fvck with that for the nitrous right?
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00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
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BrooklynNYZX12
Zone Head
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posted December 13, 2009 07:25 PM
Sounds like a lazy injector...when its missing or not running right get a spray bottle to spray the head pipes to isolate which cylinder or cylinders are the culprit.
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zx12richard
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posted December 14, 2009 07:26 AM
All I did with temp sensor was cut wire and put fittings on so I can plug in a resistor which I don't do often. But after yesterday I truely believe its a injector. I started bike at 35 degrees with no fast idle or choke whichever ya wanna call it. After running about 30 to 45 seconds it acted like it wanted to load up. Revved it up a bit and it acted like it burnt excess fuel. Idles down it tried loading up revved again held steady around 3k it smoothed out again. Took it for ride and once warm acted perfectly normal. The fact that the cold natured bitch it normally is started without choke makes me think it got plenty of fuel from injector not doing right.
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entropy
Moderator
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posted December 14, 2009 09:36 AM
Richard,
there is no choke, that lever is just fast idle.
The ECU gives fuel as it thinks it should based on engine temp, airbox temp, MAP, rpm, TP, etc.
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BrooklynNYZX12
Zone Head
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posted December 14, 2009 11:31 AM
Change the oil...because you are probably gas washing the motor if the injector/injectors are the issue here.
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tuusinii
Pro
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posted December 15, 2009 12:29 AM
Is there a PC hooked up? And check the TPS position, should be 1.084-1.086 (by the book).
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