09 crf450 wont start new motor

ryanh827
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ryanh827
Edited Date/Time 12/16/2014 11:30pm
i have an 09 crf 450 just got the motor rebuilt new crank cylinder hear valves pretty much every part you can buy is new so its not mechanical and when i pulled the plug it would spark maybe 1 out 5 kicks and it was a very dim orange spark it is a brand new plug so that is not the problem and checked all the plugs over and over ground is good also fuel pressure good everything is good any advice or experience with something like this would be great
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Paw Paw 271
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Paw Paw 271 12/14/2014 4:17pm
12/14/2014 4:17pm Edited Date/Time 12/14/2014 4:20pm
You need to check the coil by doing an OHMs test on the primary and secondary sides. Normally an Orange color spark indicates a poor connection on the secondary side between the plug and the plug boot. It can be a bad or corroded boot connection or a poor connection from the boot to the wire. Unscrew the plug cap from the wire. Cut 1/4" off the wire and screw the boot back on and then check your spark. While you have the boot off clean the metal connection in the boot or replace the boot.

Paw Paw
ryanh827
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ryanh827 12/14/2014 4:40pm
12/14/2014 4:40pm
ill try that tomorrow thanks for the help
ryanh827
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ryanh827 12/15/2014 4:39pm
12/15/2014 4:39pm
Paw Paw 271 wrote:
You need to check the coil by doing an OHMs test on the primary and secondary sides. Normally an Orange color spark indicates a poor connection...
You need to check the coil by doing an OHMs test on the primary and secondary sides. Normally an Orange color spark indicates a poor connection on the secondary side between the plug and the plug boot. It can be a bad or corroded boot connection or a poor connection from the boot to the wire. Unscrew the plug cap from the wire. Cut 1/4" off the wire and screw the boot back on and then check your spark. While you have the boot off clean the metal connection in the boot or replace the boot.

Paw Paw
checking spark again and now it seems to spark every single single time i dont know if the pug was grounded bad or if something is coming and going electrical but has good spark now but still nothing all is does is backfire occasionally and im positive that its in time all marks are lined up has fuel pressure the little screen by the injector is clean just still nothing
Paw Paw 271
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Paw Paw 271 12/15/2014 7:22pm
12/15/2014 7:22pm
Start at the basics....
Check cam timing.
Check valve clearances.
Check fuel pump.
Have injector cleaned.
See if it will fire up using starter fluid. If it starts and dies, you have a fuel delivery issue. If it still does not start, you may have valve clearance issues or cam timing issues. Was the cam chain replaced?

Paw Paw

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ryanh827
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ryanh827 12/16/2014 8:16am
12/16/2014 8:16am
Paw Paw 271 wrote:
Start at the basics.... Check cam timing. Check valve clearances. Check fuel pump. Have injector cleaned. See if it will fire up using starter fluid. If...
Start at the basics....
Check cam timing.
Check valve clearances.
Check fuel pump.
Have injector cleaned.
See if it will fire up using starter fluid. If it starts and dies, you have a fuel delivery issue. If it still does not start, you may have valve clearance issues or cam timing issues. Was the cam chain replaced?

Paw Paw
checked valves checked timing sprayed starter fluid nothing fuel pumps good cam chain is new also i dont think its mechanical because now it seems like spark is coming and going which is going to be a problem because when we test the stator and ecm its all checks out good but sometimes it sparks every kick try again later it will will spark twice out of 20 kicks
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Paw Paw 271 12/16/2014 9:25am
12/16/2014 9:25am
I would pull the stator cover and the flywheel so you can check the trigger coil and the flywheel for metal shavings and to clean.
Have you done an ohms test on the coil?
Are the coil mounts good and clean?

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ryanh827
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ryanh827 12/16/2014 4:34pm
12/16/2014 4:34pm
yes and yes
ryanh827
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ryanh827 12/16/2014 4:35pm
12/16/2014 4:35pm
Paw Paw 271 wrote:
I would pull the stator cover and the flywheel so you can check the trigger coil and the flywheel for metal shavings and to clean. Have...
I would pull the stator cover and the flywheel so you can check the trigger coil and the flywheel for metal shavings and to clean.
Have you done an ohms test on the coil?
Are the coil mounts good and clean?

Paw Paw
yes
Dragoo168
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Dragoo168 12/16/2014 4:38pm
12/16/2014 4:38pm
May sound elementary, but did you check the spark plug/cap, and the kill switch?
ryanh827
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ryanh827 12/16/2014 11:29pm
12/16/2014 11:29pm
Dragoo168 wrote:
May sound elementary, but did you check the spark plug/cap, and the kill switch?
well every common cause for this checks out goos so at this point no question is a bad one lol but yes checked that actually had a mechanic check it out he couldnt find the problem either and has every kind of tool and tester needed the problem is spark is coming and going randomly so whatever the problem is still some what works so it still gives off voltage
ryanh827
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ryanh827 12/16/2014 11:30pm
12/16/2014 11:30pm
i just ordered a stator today so when it gets here ill try that we've checked everything you can so time to start buying parts and swaping

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