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Old 08-19-2010, 12:17 AM   #1
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Default engine dies when clutch is released

I have a 1992 turbo td04h miata 1.6.

I swapped in a 1990 miata motor cause the other one was bad.

everything seems to be bolted on correctly and no leaks.

i just started it today and the engine ran a bit weird. Kind of like a lawn mower. The distributer is still lose for adjustments. The problem is...

I start the miata, slowly let go of the clutch, then the engine dies... I am stumped.. What could be the problem?
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Old 08-19-2010, 12:42 AM   #2
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Miatas have distributors? I don't think you have a miata engine, bro.
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Old 08-19-2010, 01:01 AM   #3
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Red face distributors

sorry, I meant the miata crank position senser. The cylinder shaped deal attached to the back side of the intake cam rod..

http://www.carpartswholesale.com/ima.../A13135438.jpg

Last edited by MongER; 08-19-2010 at 01:04 AM. Reason: picture
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Old 08-19-2010, 01:22 AM   #4
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is the car in gear?
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Old 08-19-2010, 01:24 AM   #5
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Quote:
Originally Posted by magnamx-5 View Post
is the car in gear?


Is the timing good?
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Old 08-19-2010, 01:29 AM   #6
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Default neutral

The car is not in gear.

We pushed the car unto the driveway. I noticed that the clutch and brake was really lose and grabbed some dot3 and tried bleeding them in for about 10 minutes.

Then i started the car up in neutral. With my foot down on the clutch pedal, it runs ok. (sound a bit like a lawn mower) As soon as the clutch becomes completely released while in neutral, the car dies.. (!?)
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Old 08-19-2010, 01:31 AM   #7
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Is the timing good?
i set it to (10) top dead center, intake cam and exhaust cam straight up.

As far as timing.. could that cause the engine to just stall when the clutch is fully released in neutral?
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Old 08-19-2010, 01:41 AM   #8
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I figured the car was in gear and you were trying to go forward...

So it doesn't try and move forward when you let out the clutch?

What if you give it a bit of gas as you let out the clutch.. still die?

Could the transmission be fux0red... binding of some sort?


Honestly not really sure, just figured I'd throw some random stuff out there.
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Old 08-19-2010, 01:41 AM   #9
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Quote:
Originally Posted by MongER View Post
i set it to (10) top dead center, intake cam and exhaust cam straight up.

As far as timing.. could that cause the engine to just stall when the clutch is fully released in neutral?
Eh? That's not set properly. We'll get to the clutch issue after the lawn mower issue.
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Old 08-19-2010, 09:21 AM   #10
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lawn mower issue: figure out what exhaust connection isn't tight/secure. If it's not obvious, I would start by making sure the coolant hard line from the heater core is bolted over the manifold at the #3 runner instead of under it.
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Old 08-19-2010, 10:48 AM   #11
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I don't think he's talking about a leak. From what I read it's not running smooth. :dontknow:

This sounds like a bad case of retarded timing or fucked ignition.
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Old 08-19-2010, 10:55 AM   #12
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Or running on 3 cylinders.
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Old 08-19-2010, 11:02 AM   #13
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Quote:
Originally Posted by rider384 View Post
Or running on 3 cylinders.
Which would be teh confuckled ignition. Can we get pictures of your timing setup?
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Old 08-19-2010, 12:54 PM   #14
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I retightened the bolts on the exhaust and adjusted the crank position sensor. It seems to sound great now.

Now I cant seem to figure out why the car dies when the clutch is released. (!?)

Wow, the engine runs so rich. When i pump a little gas, the engine dies all together... as if i flooded the engine. (400cc injecters)

Is there a way to manually tune this link engine management right from its viewing screen? I dont have any of the applications and linkages to it. (never tuned it before)
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Old 08-19-2010, 01:02 PM   #15
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Even still, your car shouldn't be dumping that much fuel into your engine. What other fuel modification have you made (rail/pump, blah blah)?
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Old 08-19-2010, 01:13 PM   #16
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Default random pix

here are some random pictures of what im doing.

running too rich

http://c3.ac-images.myspacecdn.com/i...119c9e7e36.jpg

link engine management setup

http://c2.ac-images.myspacecdn.com/i...dd50abed71.jpg

stick on the clutch while i work

http://c1.ac-images.myspacecdn.com/i...baa2bce978.jpg

turbo setup while engine is running

http://c1.ac-images.myspacecdn.com/i...0d42f0d7ac.jpg

Last edited by MongER; 08-19-2010 at 01:36 PM. Reason: links not working
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Old 08-19-2010, 01:26 PM   #17
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I can't see any of those pictures, ha ha. It just comes up with an error message.
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Old 08-19-2010, 01:32 PM   #18
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Default fuel rail setup

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Old 08-19-2010, 01:38 PM   #19
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Default moving circles

Quote:
Originally Posted by E-NA6CE View Post
I can't see any of those pictures, ha ha. It just comes up with an error message.
everytime i read your responses.. i swear those circles are moving.. or is it just me.. XD
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Old 08-19-2010, 01:40 PM   #20
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Ha ha, it's an illusion. And am I blind or can I not see a FPR anywhere?
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