No spark - EFI conversion

stangman16

Active Member

Nov 16, 2004

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San Antonio, TX

Dec 31, 2006

#1

• Dec 31, 2006

• #1

I'm unable to get my '66 w/ EFI to start, it has new distributor cap, rotor, plugs, and coil. And before I take out the dizzy to have the TFI and PIP tested (which I don't even know where the PIP is or how to test) I'm curious about this one wire that is not connected, and I cannot find a diagram for what this is to. I'm getting fuel but no spark when cranking, with an inductive timing light I don't show anything, except one time when I was turning the key (back to off) the timing light flashed 1 time, but not since then.

Does anyone know what this green wire is for? Perhaps is that why I'm not getting any spark?



How do you check that the coil is getting power?

 

stangman16

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Nov 16, 2004

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San Antonio, TX

Dec 31, 2006

#2

• Dec 31, 2006

• #2

okay I checked the voltage to the red & green stripe wire and it's getting power, that all green wire gets power only when the coil plug is in...

 

stangman16

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Nov 16, 2004

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San Antonio, TX

Dec 31, 2006

#3

• Dec 31, 2006

• #3

Went down to autozone and had them test the TFI - 3 tests, and it's working fine.

How do I take out & test the PIP (or pickup coil)?

 

stangman16

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Nov 16, 2004

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Dec 31, 2006

#4

• Dec 31, 2006

• #4

does anyone know how to get the gear off? I've tried and it doesn't want to budge...



this thing cannot be tested in the distributor?

 

S

superhuaman

New Member

Nov 8, 2004

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Harrisburg, PA

Dec 31, 2006

#5

• Dec 31, 2006

• #5

does that green wire come out of the coil plug? it looks like it does...if so, it is only a tach lead.

 

stangman16

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Nov 16, 2004

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San Antonio, TX

Dec 31, 2006

#6

• Dec 31, 2006

• #6

k - thanks! Now that I think about it, it's gotta be the tach lead.

Where do you hook up the test light to test the PIP ?

 

S

superhuaman

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Nov 8, 2004

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Harrisburg, PA

Dec 31, 2006

#7

• Dec 31, 2006

• #7

search on ebay for a tool made by thexton to r&r the dist gear. its like 50 bucks. when you remove the tfi module, there are three terminals to the pip. i am not sure how to test it with a light. it is best tested with an oscilloscope.

 

stangman16

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Nov 16, 2004

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San Antonio, TX

Dec 31, 2006

#8

• Dec 31, 2006

• #8

okay, so I have to take off the TFI to test the PIP terminals?

($50!? for that price I might as well spend more and get a new dizzy... - think the parts store could press the thing back on for me?)

 

S

superhuaman

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Nov 8, 2004

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Harrisburg, PA

Dec 31, 2006

#9

• Dec 31, 2006

• #9

yes you must take off the tfi to test the pip. and dont worry about the old dist - if you buy a rebuilt one, you will have to return a core. most times parts stores wont have this tool.

 

stangman16

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Nov 16, 2004

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San Antonio, TX

Dec 31, 2006

#10

• Dec 31, 2006

• #10

hmm... do you know how to test it with a volt-ohm-meter instead of a light or oscilloscope?

 

S

superhuaman

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Nov 8, 2004

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Harrisburg, PA

Dec 31, 2006

#11

• Dec 31, 2006

• #11

here is how to test the tfi with a meter...still looking for the pip
http://www.therangerstation.com/tech_library/TFI_Diagnostic.html

EDIT:
Hall effect crankshaft position sensors typically have three terminals; one for current feed, one for ground and one for the output signal. The sensor must have voltage and ground to produce a signal, so check these terminals first with an analog voltmeter. Sensor output can be checked by unplugging the DIS module and cranking the engine to see if the sensor produces a voltage signal. The voltmeter needle should jump each time a shutter blade passes through the Hall effect switch. If observed on an oscilloscope, you should see a square waveform. No signal would tell you the sensor has failed.

Now all we need is a wiring diagram...

EDIT: thanks to tmoss for the diagram!

So just give it power and ground and hook up the meter to the other terminal and see if you get a signal in volts when you spin it.

 

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#12

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• #12

The pip sensor also provides the pulse to fire the injectors. Get a noid light form AutoZone or other auto parts store, or even better a set of them

This set is from http://www.toolking.com/ProductInfo.aspx?productid=12492 and costs $12.
Plug the noid light into any one of the fuel injector wiring sockets and try to start the engine. If the pip is working, it will cause the noid light(s) to flash.