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> Where to clean and where to lube, injector trigger points
jsayre914
post Aug 19 2012, 04:01 PM
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Can you show me on this picture where you would clean, and with what.

Also where to lubricate and with what.


Thanks
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914Sixer
post Aug 19 2012, 07:45 PM
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I would probably just wipe them out good. Spray some electrical contact cleaner. Make sure the contact points are clean and not pitted. Lube the pivot shafts with distributor grease.
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Dave_Darling
post Aug 20 2012, 12:35 AM
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Clean the metal contact bits. Clean the plastic rubbing blocks. Clean the pivots and so on. Clean the electrical contacts inside the plug with TV tuner cleaner (or equivalent). Re-lube the pivots and put a dot of the super-sticky distributor grease on each of the plastic rubbing blocks.

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jsayre914
post Dec 12 2012, 03:17 PM
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Im not sure if its alignment or what. I am still getting an occasional loss of power (bucking) under heavy accleration. No bucking under constant speed at any RPM, no bucking if im driving around town, even quick. Only noticable when I am on the Highway at speed and then I floor it. TPS is good, and accleration is smooth other than this highway bucking.

Do I need more lube on the triggerpoints?
This is my second used set. Are there any available new?
I adjusted them to look center. is there a way to adjust with tools?

I am gonna bet my problem is trigger related


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914itis
post Dec 12 2012, 04:13 PM
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Joe, Did you check the vacuum advance on the dizzy to make sure that the arms are moving properly?
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porschepartguy
post Dec 12 2012, 04:20 PM
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I have NOS, Bosch # 1 230 090 000 trigger points. $100 shipped.

if interested, please email: porschepartguy@gmail.com

Best,

John
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TheCabinetmaker
post Dec 12 2012, 04:39 PM
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Save your hundred bucks. What you describe is not a trigger point problem.
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sfrenck
post Dec 12 2012, 04:48 PM
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QUOTE(The Cabinetmaker @ Dec 12 2012, 05:39 PM) *

Save your hundred bucks. What you describe is not a trigger point problem.


And the problem is..... (IMG:style_emoticons/default/WTF.gif)
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TheCabinetmaker
post Dec 12 2012, 05:26 PM
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Bucking is almost always caused by a rich fuel condition. Happening at wot would point me toward the MPS.
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jsayre914
post Dec 12 2012, 05:31 PM
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QUOTE(The Cabinetmaker @ Dec 12 2012, 06:26 PM) *

Bucking is almost always caused by a rich fuel condition. Happening at wot would point me toward the MPS.


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I did notice the AFR gauge drops off the lean end for a milisecond with each buck.
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jsayre914
post Dec 13 2012, 04:42 PM
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Hey, i was just thinking. Its been about 3000 miles since my last valve adjustment. I will adjust this weekend. Since this problem came on about a week ago, i was wondering if it could just be symptom of a needed adjustment

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mepstein
post Dec 13 2012, 09:50 PM
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QUOTE(The Cabinetmaker @ Dec 12 2012, 06:26 PM) *

Bucking is almost always caused by a rich fuel condition. Happening at wot would point me toward the MPS.


What if it's happening at any throttle position? (I've been trying to trouble shoot a bucking problem for a while now.Sometimes it's fine, sometimes it's terrible).
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McMark
post Dec 14 2012, 03:34 PM
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Didn't see anyone mention TPS. Try unplugging it and seeing if the problem persists. Your acceleration will be decreased, but it'll run 'fine'.
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john rogers
post Dec 14 2012, 04:07 PM
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In all the years we had a 2L with trigger points (10?), we never found cleaning/lubing/etc to them did anything. The only thing that worked was putting in new ones and generally that was done after everything else was adjusted, poked, replaced, etc and the problem never went away but new points "magically" fixed it! This may be against what many will say but the replacement ALWAYS fixed the problem.

Since you said the O2 dropped low, I would suggest installing a fuel pressure gauge and run it up through the engine lid so someone can watch it. The engine is a bit larger and it sounds like to me there is not enough fuel being caused by pressure surges. We used a gauge that was left in all the time and now and then I would run the pressure up and down just to "clean out" the pressure regulator. Seemed to help.

A note, if you unplug anything, make sure the hoses are well plugged so an air leak does not mask the issue.
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jsayre914
post Dec 14 2012, 04:13 PM
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QUOTE(john rogers @ Dec 14 2012, 05:07 PM) *

In all the years we had a 2L with trigger points (10?), we never found cleaning/lubing/etc to them did anything. The only thing that worked was putting in new ones and generally that was done after everything else was adjusted, poked, replaced, etc and the problem never went away but new points "magically" fixed it! This may be against what many will say but the replacement ALWAYS fixed the problem.

Since you said the O2 dropped low, I would suggest installing a fuel pressure gauge and run it up through the engine lid so someone can watch it. The engine is a bit larger and it sounds like to me there is not enough fuel being caused by pressure surges. We used a gauge that was left in all the time and now and then I would run the pressure up and down just to "clean out" the pressure regulator. Seemed to help.

A note, if you unplug anything, make sure the hoses are well plugged so an air leak does not mask the issue.


I do have a fuel gauge in the cabin it holds steady @30psi under any and all conditions, needle dosnt even wiggle. Im thinking trigger points
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porschepartguy
post Dec 14 2012, 08:06 PM
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Hey Joseph,

My partner will be at the shop tomorrow to pick up the trigger points. He will call you then and send paypal request.

Thanks

John
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Dave_Darling
post Dec 14 2012, 10:18 PM
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If you have access to an oscilloscope, you can scope the trigger point signals to see if they're noisy or bouncing.

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