Sr20probs

Hey guys I have a freshly rebuilt sr20det that is timed correctly, has spark and fuel but it?s not even trying to fire. When i test the spark with my megasquirt it?s great, but when I crank it with the plug out it sparks every so often. Grounds are good. Is it the crank angle sensor? I?m at a loss at this moment.

zombiewolf513

check the spark plug gap?

Sr20probs

Yes the plugs come .032 that wouldn’t cause it to not start would it?

S14rebuild

The spark plug only fires when that cylinder is at tdc compression stroke. Not suppose to fire nonstop

Engine is fresh rebuilt?.... check mechanical timing and then make sure ur CAS is intalled properly aswell

Sr20probs

Mechanical timing seems to be perfect, I used the mazworxs timing chain tool and put so much patience into it. I have a picture too it lines up perfect. It’s a red top and when it’s lined up the cas lines up with the notch on the right.

S14rebuild

Maxworks timing tool only shows the cams... balancer mark and from timing cover pin need tobe lined up, thats if the chain is on correctly on the crank sprocket.

As for the cas

https://frsport.com/How-To-Set-Crank...gine_t_25.html


Idk about notches..just dots.

Sr20probs

Yes crank is properly lined up on the crank sprocket I made sure of that because I had it jump a tooth when I resealed it and went to line up the marks. I couldn’t get it. When I took off the timing cover I realized it jumped a tooth so I redid it very carefully and it lined up perfectly. It was on an engine stand when this happened.The crank lines up on the second mark with the dark links on the dots in the correct Way. The timing chain has about a 1/4” slack as according to mazworx instructions. I believe the CAS is lined up right. Am I wrong?

zombiewolf513

post the pictures of the mechanical timing.

S14rebuild

With no pics how would we know?

Sr20probs

for some reason its not uploading the picture. i emailed it to myself to upload it. any ideas? not to sound weird but i can leave my email or phone number to send it. its really getting annoying lol.

Sr20probs

978-944-5062 text me and i can send the picture and get an opinion

S14rebuild

imgur upload or imageshack..copy and paste the link....

I dont text dudes...

Sr20probs

https://imageshack.com/my/images here i didn't even know about these websites. lol just lookin for a answer hopefully this helps.

S14rebuild

Def dont see ur pics..... gotta post the specific links to that picture...

Sr20probs

zombiewolf513

reposting for a

Sr20probs

Is this wrong?

S14rebuild

Looks good.

What about ur cas? Posted the link to install properly....is that correct?

Sr20probs

https://imagizer.imageshack.com/v2/3...924/J4bNKi.jpg Here you go hope this is good as well

S14rebuild

Thumbs up...

So spark, fuel, air, compression......what u missing?

Sr20probs

Update, fuel only sprays with megasquirt but not when cranking. Explains why it won’t start. Any ideas?

S14rebuild

Guessn u have a laptop accessing the megasquirt setup

Are u seeing cas triggers?

Injectors all share a common wire color for 12postive with key on

Ecu grounds each injector to fire it

Sr20probs

Thank you I’m gonna have to try that.

Krazy719

I would definitely try retiming the ignition timing you can have it give you spark but not firing in the right order give it a shot literally had this problem today


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Sr20probs

How would go about doing that without questioning it haha

Krazy719

Go ahead & put the motor on tdc then pull off the cap on the distributor check if the rotor is on cylinder one if it isn?t pull the distributor out & reset it & if it is on cylinder one I would still pull it out & reset it it could be off a tooth & not firing right best of luck man also what you can do is put some starter fluid in the intake if she back fires from it it?s definitely your ignition timing if you believe everything else is set on timing correctly


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Sr20probs

The mechanical timing wouldn’t line up if it was wrong correct? And everything seems good. Has to be that.

Krazy719

No the distributor timing is separate so who ever put it together put the mechanical timing correct & the distributor timing would be separate so don?t mess with the mechanical timing just the distributor timing


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S14rebuild

Theres no distributor, cap, or rotor.... its an sr20det


I posted you the link already on how to install the cas CAM ANGLE SENSOR

follow it

Krazy719

Dang that suck I was going off of my Kat but definitely sounds like the cas


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