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Is my timing belt & cams timed correctly?

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Old 02-17-2018, 11:30 PM
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Default Is my timing belt & cams timed correctly?
I'm doing a timing belt change and my miata won't start. It cranks and just backfires. I've testing for fuel and spark and I'm getting both.
I just wanted to make sure I have the timing set up correctly. I've adjusted the timing 4 times already and it looks like everything is timed correctly but it still doesn't start.

I took several photos in different angles. From above it looks like they are off but from a bottom view they look like they're correct. There are 19 tooth between the two cam marks.
Also I believe the trigger wheel is on correctly, the little nipple thing is be facing forward, right? And the concave part facing the engine?

Before the belt change the car would start up normally. It's a 95 with a VVT swap in it, running on MS3.
Is there anyway to use megasquirt to check for possible issues?
Attached Thumbnails Is my timing belt & cams timed correctly?-img_20180217_200207.jpg   Is my timing belt & cams timed correctly?-img_20180217_200218.jpg   Is my timing belt & cams timed correctly?-img_20180217_200250.jpg   Is my timing belt & cams timed correctly?-img_20180217_200259.jpg   Is my timing belt & cams timed correctly?-img_20180217_200324.jpg  

Is my timing belt & cams timed correctly?-img_20180217_200332.jpg   Is my timing belt & cams timed correctly?-img_20180217_200346.jpg  
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Old 02-17-2018, 11:44 PM
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What does the crank look like? How about #1 cam lobes?

edit: oops missed the crank pic
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Old 02-17-2018, 11:52 PM
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I'm stupid.
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Old 02-17-2018, 11:58 PM
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Originally Posted by sshamrockk
Not timed right, the "E" on the exhaust cam, should be pointing at the cam mark. as for the intake, not sure. I wanna say the cam lobes for cyl #1 should be pointing out, away from each other, or close to that. But, I could be wrong.

EDIT: Also, the cly #1 at TDC?
Really? I thought the "I" on the exhaust cam should be pointing toward the marking on the timing cover, or have I been reading it wrong this whole time?

Yes cylinder #1 is at TDC, the notch and the dorito on the crank is lined up.

Here is a photo of the cam lobes. Sorry for the excessive flare, camera lens is broken
Attached Thumbnails Is my timing belt & cams timed correctly?-img_20180217_205139.jpg  
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Old 02-18-2018, 12:26 AM
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Originally Posted by sshamrockk
Not timed right, the "E" on the exhaust cam, should be pointing at the cam mark. as for the intake, not sure. I wanna say the cam lobes for cyl #1 should be pointing out, away from each other, or close to that. But, I could be wrong.

Nope. OP has it right.
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Old 02-18-2018, 12:36 AM
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I'm double stupid.
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Old 02-18-2018, 01:28 AM
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Does the VVT have a crank postion sensor as well?
If so, have you checked the gap on it?

I hear that if the gap is wrong, you'll have similar issues.
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Old 02-18-2018, 02:09 AM
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Originally Posted by sshamrockk
the dorito and the notch will line up for every cylinder that comes to TDC, are you sure cylinder 1 is the one at TDC, is what i'm getting at.
Oh crap, I did not know that, I will check and report back.

Originally Posted by SchmoozerJoe
Does the VVT have a crank postion sensor as well?
If so, have you checked the gap on it?

I hear that if the gap is wrong, you'll have similar issues.
Yeah, the gap is correct. The spacing is about a thickness of a credit card.
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Old 02-18-2018, 02:16 AM
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Just checked, cylinder #1 is at TDC.
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Old 02-18-2018, 10:46 AM
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Originally Posted by sshamrockk
the dorito and the notch will line up for every cylinder that comes to TDC, are you sure cylinder 1 is the one at TDC, is what i'm getting at.
no, stop spreading lies, wtf.
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Old 02-18-2018, 11:13 AM
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It's possible to install your crank sensor wheel backwards. Post some pics of your pulley assembly. Are you on a MS? Can you post a high speed log to show whether you're getting cam and crank signals?
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Old 02-18-2018, 05:11 PM
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Originally Posted by wackbards
It's possible to install your crank sensor wheel backwards. Post some pics of your pulley assembly. Are you on a MS? Can you post a high speed log to show whether you're getting cam and crank signals?
Here's a picture of the trigger wheel. The nub should be facing forward right?
Just needa make sure everything is on correctly before I put back together and log the data.
Attached Thumbnails Is my timing belt & cams timed correctly?-img_20180218_104616.jpg  
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Old 02-18-2018, 05:23 PM
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Originally Posted by 4tehlolxz
Here's a picture of the trigger wheel. The nub should be facing forward right?
Just needa make sure everything is on correctly before I put back together and log the data.
Nope. The detent nub that marks TDC should have the convex side pointing aft towards the engine. You have it in backwards.
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Old 02-18-2018, 06:55 PM
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Originally Posted by wackbards
Nope. The detent nub that marks TDC should have the convex side pointing aft towards the engine. You have it in backwards.
Damn it, I read somewhere that the nub should be facing forward (as in forward facing towards me, not the engine). I will try it and report back.
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Old 02-18-2018, 09:45 PM
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Car started, trigger wheel was on backwards
Thanks everyone.

Though it died after, but started up again after I gave it some throttle. And my AFR read 22 and stayed there. Normally afterwards it'll go to the correct AFR reading, any adjustments I need to make? Remove O2 sensor and calibrate in open air?

EDIT: Nvm, all is good.
Last edited by 4tehlolxz; 02-18-2018 at 11:05 PM.
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