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Search: Posts Made By: boyt911sc
Forum: Porsche 911 Technical Forum Yesterday, 08:31 PM
Replies: 33
Views: 325
Posted By boyt911sc
Warm-up Regulator identification......

Mark,

It would be much easier to help you if you understand the basic CIS fuel flow schematic. You said you have a ‘74 CIS, and that’s a good start. Since you know now the difference between a CSV...
Forum: Porsche 911 Technical Forum Yesterday, 04:48 AM
Replies: 15
Views: 503
Posted By boyt911sc
Adapt to your needs.........

Walt,

That is what a CIS bench tester will do for you if you don’t use your car to test the fuel distributors and warm up regulators. Like everyone else, we started using the car to test and...
Forum: Porsche 911 Technical Forum Yesterday, 04:18 AM
Replies: 37
Views: 992
Posted By boyt911sc
Testing CIS components..........FREE.

Ken,

The 2 sets fuel injectors (new & used) both passed the tests. The old used sets are still acceptable to use but their spray patterns are not as nice and uniform like the new set. Which you...
Forum: 911 Engine Rebuilding Forum 09-26-2020, 07:20 PM
Replies: 11
Views: 370
Posted By boyt911sc
Pictures would help......

Post some pictures if you want better responses to your question.

Tony
Forum: Porsche 911 Used Parts For Sale & Wanted 09-25-2020, 11:50 AM
Replies: 3
Views: 72
Posted By boyt911sc
Breather cover.........

Andrew,

Payment sent. Thanks.

Tony
Forum: Porsche 911 Used Parts For Sale & Wanted 09-25-2020, 11:18 AM
Replies: 3
Views: 72
Posted By boyt911sc
Crankcase breather cover........

I will take one with the temperature switch hole. PM sent.

Tony
Forum: Porsche 911 Technical Forum 09-25-2020, 03:19 AM
Replies: 34
Views: 4,748
Posted By boyt911sc
CDI tester........

Manin,

Could you share with us what you got? Interested in getting one too. Thanks.

Tony
Forum: Porsche 911 Technical Forum 09-24-2020, 02:38 PM
Replies: 15
Views: 503
Posted By boyt911sc
Leave the AFM alone.......

jstith,

The problem is the stuck FD plunger/piston. After you removed the FD from the AFM unit, the sensor plate would be free to move. Test and confirm the movement of the sensor plate lever....
Forum: 911 Engine Rebuilding Forum 09-24-2020, 07:01 AM
Replies: 61
Views: 12,378
Posted By boyt911sc
Header fabrication jigs.........

I bought these jigs to try making some exhaust headers. Unfortunately, welding is not my forte and decided to spend my time in other projects. I paid $100 and gladly like to offer to anyone for the...
Forum: Porsche 911 Technical Forum 09-23-2020, 01:31 PM
Replies: 37
Views: 1,659
Posted By boyt911sc
Oil pressure switch........

John W.,

I concur with your observation. The amount of oil coming out shown in the video was too much to be caused alone by OPS. It would be prudent to inspect other possible culprits like the...
Forum: Porsche 911 Technical Forum 09-23-2020, 12:07 PM
Replies: 37
Views: 1,659
Posted By boyt911sc
Oil pressure switch modification.........

John,

Do yourself a favor next time you install a replacement oil pressure switch. Apply some JBWeld between plastic and metal sections of the oil switch as shown below.
...
Forum: Porsche 911 Technical Forum 09-23-2020, 10:20 AM
Replies: 21
Views: 796
Posted By boyt911sc
Draining gas tank.......

Len,

I found this 30+ year old battery operated pump for my kerosene heater in the garage and used it to syphon the old gasoline. It was easy and less messy than draining the gasoline from...
Forum: 911 Engine Rebuilding Forum 09-23-2020, 04:22 AM
Replies: 11
Views: 307
Posted By boyt911sc
Cylinder hold down nuts..........

Xabia,

Use cylinder hold down nuts to keep the cylinders from sliding out. Rotate the engine 90° and install the cylinder heads one at a time. Do not torque the cylinder head nuts until you are...
Forum: Porsche 911 Used Parts For Sale & Wanted 09-22-2020, 02:26 PM
Replies: 2
Views: 120
Posted By boyt911sc
Demo WUR available.....

If your car is an ‘80 SC US spec., you would need a WUR-072. If you have a EURO/ROW it would be something else. Why do you think you need a replacement WUR.? Have you tested and confirmed it?

PM...
Forum: 911 Engine Rebuilding Forum 09-22-2020, 02:15 PM
Replies: 11
Views: 307
Posted By boyt911sc
Preferred method for assembly.........

Both methods work. Whatever is your preferred method sub assembly or piece by piece method is a choice. No where in the rebuilding books by Wayne Dempsey nor Bruce Anderson mentioned the preferred...
Forum: Porsche 911 Used Parts For Sale & Wanted 09-22-2020, 12:02 PM
Replies: 8
Views: 237
Posted By boyt911sc
Spec booklets......

I will take the Carrera 3.2 booklet. PM sent.

Tony
Forum: Porsche 911 Technical Forum 09-21-2020, 04:42 AM
Replies: 1
Views: 182
Posted By boyt911sc
Filtration system...........

Neil,

You have two (2) filtration systems before the fuel reaches the WUR.
Gas tank screen filter.
Fuel filter after the fuel accumulator.


Check them. Use compressed air to clean the...
Forum: Porsche 911 Technical Forum 09-20-2020, 08:49 AM
Replies: 2
Views: 178
Posted By boyt911sc
TTS testing.......

Steve,

The two (2) terminals for the TTS (thermotime switch) namely G (small) and W (large) terminals should have continuity when cold (below 113°F). And open above 113°F. Double check it using...
Forum: Porsche 911 Technical Forum 09-20-2020, 04:33 AM
Replies: 11
Views: 525
Posted By boyt911sc
Stuck FD plunger..........

The most common cause of FD stuck plunger is the formation from stale gasoline a microscopic film of varnish between the piston or plunger and the barrel wall. When the adhesion is not too severe,...
Forum: Porsche 911 Technical Forum 09-18-2020, 02:03 PM
Replies: 37
Views: 992
Posted By boyt911sc
CIS troubleshooting.........

Warren,

Well written. The problem could be two (2) fold:
a). Your pressure gauge from HF is notorious for giving false readings.
b). Your PPV (primary pressure valve) needs additional shim/s to...
Forum: 911 Engine Rebuilding Forum 09-18-2020, 01:38 PM
Replies: 11
Views: 370
Posted By boyt911sc
Auxiliary oil thermostat........

Bob,

I will try to explain how the oil from the engine flows through the auxiliary oil thermostat. Imagine the four (4) oil line connections for the thermostat:
A...........from scavenger oil...
Forum: Porsche 911 Technical Forum 09-18-2020, 11:18 AM
Replies: 37
Views: 992
Posted By boyt911sc
CIS basic tests..........

Warren,

It is good that you went to the details of a fuel distributor. Forget for the moment about your post because you are getting too far ahead. What you need now is to learn and be able to...
Forum: Porsche 911 Technical Forum 09-17-2020, 01:51 PM
Replies: 26
Views: 807
Posted By boyt911sc
The FP should not run @ 30/85 connection because...

The FP should not run @ 30/85 connection because terminal #85 is a ground terminal. Look very closely to you fuel pump relay socket orientation. Terminal #30 should be at 6 o’clock and terminal #87a...
Forum: Porsche 911 Technical Forum 09-17-2020, 12:25 PM
Replies: 37
Views: 992
Posted By boyt911sc
CIS troubleshooting............the wrong way.

Warren,

I don’t know what Bosch reference manual you have been reading but the test procedures you are doing are totally wrong. Why? Your concept and understanding how your CIS works is flawed. I...
Forum: Porsche 911 Technical Forum 09-17-2020, 05:16 AM
Replies: 50
Views: 27,564
Posted By boyt911sc
CIS troubleshooting..........

Do you have a CIS pressure gauge? Follow the above suggestion. Step two: Check for sources of unmetered air. The fuel mixture could have been set to run well to compensate for the problem. Test and...
Showing results 1 to 25 of 500

 
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