need help

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Denny08 · #1 Post by **Denny08** » Fri Mar 12, 2010 11:04 pm

just put the motor back in the blaze after getting the valves adjusted checked the fuel got good flow,got a good spark but no start.

speedracer · #2 Post by **speedracer** » Fri Mar 12, 2010 11:11 pm

Maybe you have the injectors reversed,or the crank position sensorsor mixed up with the temp.sensor(I did that).

Denny08 · #3 Post by **Denny08** » Fri Mar 12, 2010 11:17 pm

QUOTE (speedracer @ Mar 12 2010, 05:11 PM) <{POST_SNAPBACK}>

Maybe you have the injectors reversed,or the crank position sensorsor mixed up with the temp.sensor(I did that).

I did check the crank sensor and temp but not the injectors

Denny08 · #4 Post by **Denny08** » Fri Mar 12, 2010 11:30 pm

changed to injectors pugs still not starting. But every so many cranks and it will pop a little

speedracer · #5 Post by **speedracer** » Fri Mar 12, 2010 11:52 pm

Good battery?

MX Quad Dad · #6 Post by **MX Quad Dad** » Sat Mar 13, 2010 12:56 am

I'm taking it that the blaze ran before the valve adjustment. Was the valve clearances ok or did you have to adjust them?

Denny08 · #7 Post by **Denny08** » Sat Mar 13, 2010 1:13 am

it ran started and ran perfectly before and I had Colby at CD racing do it. He said it needed 4 shims in it.

wistech · #8 Post by **wistech** » Sat Mar 13, 2010 1:43 am

From what see if your plugged in correctly the first step here is a compresion test.

Denny08 · #9 Post by **Denny08** » Sat Mar 13, 2010 4:07 am

QUOTE (Wistech @ Mar 12 2010, 07:43 PM) <{POST_SNAPBACK}>

From what see if your plugged in correctly the first step here is a compresion test.

if the valves are not right will this cause it not start

wistech · #10 Post by **wistech** » Sat Mar 13, 2010 4:27 am

I have not seen valves needing adjustment much regardless of mileage so when all 4 needed to be reshimmed thats the first red flag. If the valves were shimmed then cams were removed .To do so cam timing can be set wrong hence a compresion check will tell you everything you need to know. Compression lower than 50psi will for sure cause a no start /backfire/fouled plug. Was this engine updated ?