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Testing the power transistor and installing new CAS


sireelone
Unregistered


Galant VR-4 org Post #: 552735 posted 10/23/07 03:10 PM     Remind Me!  Send Private Message   Edit Post      
I was wondering if there is any way to test the power transistor on our cars with a voltmeter. I know what it looks like but I am not so sure of where it is located I think I remember seeing it on the passenger side fender wall toward the back but I could be wrong. If anyone could let me know where its located that would help a lot. As far as testing it I would assume you want 12V going in but it is my understanding that this acts as an amplifier of some sort. Anyone know what kind of voltage and amperage I should be getting out of it? Another question I have regards installing a new CAS. Can I just remove the old one and put the new one on or do I have do mess with cam positioning and timing and that sort of thing? I would appreciate any input you guys have on this. Once I get this done my car should be running again so I can get it all winterized and put away until I can drive again in a couple months, thanks.


Edited by sireelone (10/23/07 03:14 PM)

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Gimpin
Shotgun
819/2000


Galant VR-4 org Post #: 552742 posted 10/23/07 03:17 PM     Remind Me!  Send Private Message   Edit Post      
it is located under the coils kinda behind t-belt cover



"a penny saved is worth two in the bush"

819/2000 = 0.4095

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sireelone
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Galant VR-4 org Post #: 553512 posted 10/24/07 11:59 PM     Remind Me!  Send Private Message   Edit Post      
Alright then I was way off as far as the location. Anyone have any input on how to install a new CAS. I would really appreciate the info. I don't want to mess up my timing.

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CP
Still lingering, kinda like a chili and beer fart


Galant VR-4 org Post #: 553549 posted 10/25/07 07:08 AM     Remind Me!  Send Private Message   Edit Post      
There's a detailed set of tests in the FSM for the power transistor. They were too complicated for me, so I just replaced the entire unit. It didn't fix my code 44, which still plagues the car every now and then on the freeway

You'll have to reset your timing when the new CAS goes in. Be sure to orient the new CAS correctly. There's a mark on one end of the the thing that spins, which coincides with a mark on the end of the camshaft. Otherwise your ECU will think the timing is 180* the opposite.



-Cy
Resident Spec Miata Racer | '93 Audi UrS4 | '04 Ram CTD | #1788/2000: SOLD

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sireelone
Unregistered


Galant VR-4 org Post #: 553979 posted 10/25/07 11:25 PM     Remind Me!  Send Private Message   Edit Post      
Alright, if I can't get it started after I replace the CAS I'll just pick up a new power transistor. This looks like a pretty expensive part though. I just checked autozone and its running like $150. How do I go about resetting the timing?

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CP
Still lingering, kinda like a chili and beer fart


Galant VR-4 org Post #: 554016 posted 10/26/07 06:32 AM     Remind Me!  Send Private Message   Edit Post   
www.vfaq.com



-Cy
Resident Spec Miata Racer | '93 Audi UrS4 | '04 Ram CTD | #1788/2000: SOLD

Posts: 8936 | From: West Simsbury, CT | Member Since: 08/30/04 | IP: (198.105.0.129) | Report this post to a Moderator


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