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Old 09-15-2014, 09:53 PM   #1
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Ok howdy

I recently rebuild my engine in my 99 with a donor block off an older miata

It ran before i pulled it in and now she dosn't want to start.

Its getting spark, getting fuel, compression (around 150 in all cylinders), and i checked timing about 5 times, its dead on. It backfires and hickups but dosn't want to start.

https://www.youtube.com/watch?v=me2g...ature=youtu.be

i reused the oil pump, so i had to grind the nub and drill and tap a hole for the crank sensor.
99 crank position sensor mount differences - Spec Miata Garage - Mazda Racers
if im reading this thread right its saying to use an adjustable cam wheel so i can set my timing because the hole is a little different locations then the newer style oil pumps?

any advice would be awsome im really stumped:bowrof l:
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Old 09-15-2014, 10:55 PM   #2
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perhaps a bad starter??
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Old 09-15-2014, 11:11 PM   #3
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Stock ECU/MAF/injectors/ect? Same BP4W head as before, correct?
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Old 09-15-2014, 11:33 PM   #4
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I'm guessing your plug order or injector wiring is incorrect.
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Old 09-16-2014, 02:28 AM   #5
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Quote:
Originally Posted by curly View Post
I'm guessing your plug order or injector wiring is incorrect.
ditto this.

did you set your timing correctly?
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Old 09-16-2014, 11:30 PM   #6
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Timing is set, i had another person verify this
It cranks good with a charger on it, i don't think a starter would cause backfire
Didn't touch the injector harness, only rebuild the bottom end
The wires are in the right firing order, i also changed the wires
Exact same setup, just rebuild the bottom end. Same everything

timing is off somehow?
https://sites.google.com/site/miatad...ensor-on-crank

This post says "the tooth that indicates CYL1 is actually 10degBTDC making it possible to set base timing using a scope."
There are 4 teeth on the crank sensor wheel, which tooth represents cyl #1?

Thanks for all the replies, somebody does love me
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Old 09-16-2014, 11:44 PM   #7
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edit: my plan is to line the sensor up with whatever tooth represents cylinder #1, 10 degrees before tdc, and set the cams 10 degrees before top dead center and my timing should be set to the new location of my sensor.
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Old 09-18-2014, 09:26 PM   #8
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Coil pack or plugs backwards
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Old 09-19-2014, 07:59 PM   #9
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Is it possible i put the crank position tooth wheel on wrong. A tooth is alittle less then a 1/4 turn on my crank away from my sensor top dead center.
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Old 09-22-2014, 11:18 AM   #10
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Quote:
Originally Posted by namadzam View Post
Is it possible i put the crank position tooth wheel on wrong. A tooth is alittle less then a 1/4 turn on my crank away from my sensor top dead center.
Yes yes yes yes. I was going to say this. The crank trigger wheel is on backwards. I've done it before and it does exactly what you describe. It took me like 2 months to figure it out.
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Old 09-28-2014, 01:06 AM   #11
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lol i didn't cheak up on this thread until now to follow up, and i fixed the problem. Crank trigger wheel was on backwards. Thanks pdexta but i got to it first haha. First startup was great. First time driving a miata also. Gotta say its a sweet ride!
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