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Author Topic: GSXR 1000 help!  (Read 5593 times)
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Jessechop
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« on: August 09, 2012, 09:08:28 PM »

Bad stumble/miss at 7500 rpm, will just fall flat by 10k. #1 is bad rich, #2 is clean, like no fuel clean, 3# and #4 look good. All have spark, all coils test ok allthought have no been swapped out. Injectors cleaned and look to spary ok. Voltage checked at injectors and checked good

Leaning towards injectors obviously, just dont want to spend the money if I am over looking somthing. Thoughts? Ideas?
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sabat
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« Reply #1 on: August 09, 2012, 09:49:35 PM »

Is there a Power Commander inline? If so, try without it.

All cylinders leak down OK?

Fuel pump OK?

Injector cleaning is $25 each at MPS racing, 1 day turnaround.
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Jessechop
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« Reply #2 on: August 10, 2012, 06:00:43 AM »

No PC

Yes on cyl. test

No on F/P. I assumed (yes I know  grin) that that would effect all cylinders, but no big deal to test.

Thanks for letting me know about MPS
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Stainless1
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« Reply #3 on: August 11, 2012, 07:35:35 AM »

swap the injector into another cylinder.... if the problem stays in #1 then swap the coil.  If you are at the salt I have injectors and coils with me.  Car 1000 pitted back row middle but you will find us in line most of the time.

they should look really clean all the time, with just a touch of color
« Last Edit: August 11, 2012, 07:37:07 AM by Stainless1 » Logged

Stainless
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MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.
Jessechop
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« Reply #4 on: August 12, 2012, 06:35:56 PM »

Thanks for the help.

Looks like the ECU is the culprit  huh
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55chevr
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« Reply #5 on: August 12, 2012, 07:39:22 PM »

Jesse --- You going for the big engines now?


Joe
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Jessechop
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« Reply #6 on: August 12, 2012, 08:00:00 PM »

For Sept. Blew up the 250 in good fashion and turn around time on having the cylinder done to my liking wasnt going to work. So long story short I ended up with a GSXR drag bike  rolleyes
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Jessechop
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« Reply #7 on: August 16, 2012, 04:22:02 PM »

Allright, I need help  huh

Swap injectors, same problem on same cylinder. #2 is not getting fuel. Swap coils (thinking that may control the injector) same

Swaped out ecu's, same
Check wiring and all connections, same

Really at a loss, code c26 for loss of ignition from that cylinder. Have no idea what to try next. Harvest event is 2 weeks away and looking very bleak  embarassed
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saltwheels262
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« Reply #8 on: August 16, 2012, 05:56:26 PM »

could a pickup , sensor or timing wheel on the cam or crank be the culprit?

i might not be a whole lot of help on metric motors.

franey

maybe a bad cam lobe on that cylinder?
good luck with that. hope to see you running at limestone.
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Jon
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« Reply #9 on: August 16, 2012, 07:47:58 PM »

Can you swap the wires from one injector to another leaving the injectors where they are?

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« Reply #10 on: August 16, 2012, 10:10:15 PM »

Wiring as Jon Suggests?  You perhaps just check resistance down the looms with a multi meter.

Is it running coil on plug (cop)?  Have you changed out the plugs? 
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wobblywalrus
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« Reply #11 on: August 17, 2012, 12:15:24 AM »

Jesse check that you have not left a shop rag or paper towel in that cyl's inlet.  I done that once.
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Jessechop
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« Reply #12 on: August 17, 2012, 04:57:58 AM »

Thanks for the suggestions! To answer some questions:

Crank sensor/pickup is fine, or so the manual says. Basically it works or dosnt and controls all cylinders not just one.

Compression is even across the board letting me belive valve adjust, etc. is fine

Cant swap injector harness as that ultimatley effects the fuel timing, however if I jump power from another injector to that one (basically the same thing as swapping) it will spray

Coil on plug, have checked resistance through the entire loom on injector and coil side

Have not changed plugs but have taken the plug from the "bad" cylinder andput onto "good" cylinder and missfire stays on original cylinder leading me to belive it is not the plug.

Thanks for the suggestions! Greatly appreciated
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rgn
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« Reply #13 on: August 17, 2012, 05:16:59 AM »

Bad stumble/miss at 7500 rpm, will just fall flat by 10k.

How is it behaving up to 7.5K?  Running smooth no miss?  Sounds sweet? 
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Jon
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« Reply #14 on: August 17, 2012, 06:20:21 AM »

Cant swap injector harness as that ultimatley effects the fuel timing, however if I jump power from another injector to that one (basically the same thing as swapping) it will spray.

So the injector and fuel supply are good on number 2.

Jump number 2's wires to 1 or 3 and see if they squirt.

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Underhouse Engineering
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