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Old 01-07-2015, 12:36 PM   #1
Michael T
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Question Can someone take a peak under their hood for me and tell me where this is plugged.



I would have to guess it is something for the ignition. It's been unplugged since I bought the car. Cars cranks and runs, but its missing and not idling great. I've done maintenance items that should of cleared this problem up but it hasn't so now I'm moving on to the mystery wiring I have around the engine bay.
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Old 01-07-2015, 12:43 PM   #2
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Simply put, nothing.
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Old 01-07-2015, 12:53 PM   #3
Michael T
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Simply put, nothing.
Thanks! I'll keep searching for the problem.
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Old 01-07-2015, 01:21 PM   #4
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How bad is your idle?
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Old 01-07-2015, 01:25 PM   #5
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Originally Posted by Michael T View Post


I would have to guess it is something for the ignition. It's been unplugged since I bought the car. Cars cranks and runs, but its missing and not idling great. I've done maintenance items that should of cleared this problem up but it hasn't so now I'm moving on to the mystery wiring I have around the engine bay.

It isn't plugged into anything because it never was. It is a system test lead used to diagnose problems.
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Old 01-07-2015, 01:41 PM   #6
Michael T
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How bad is your idle?
It goes between very nice to being annoyingly rough.
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Old 01-07-2015, 02:20 PM   #7
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Originally Posted by Michael T View Post


I would have to guess it is something for the ignition. It's been unplugged since I bought the car. Cars cranks and runs, but its missing and not idling great. I've done maintenance items that should of cleared this problem up but it hasn't so now I'm moving on to the mystery wiring I have around the engine bay.
Looking at the picture 1 wire (white) isn't connected to coil and if all your electrical connections and grounds look that bad they all need to be cleaned up. Check for vacuum leaks(dry rot hoses)intake gasket,injector O rings.Check by spraying break cleaner on them but not on exhaust side.
I guess what we need to know is what have you done so far.
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Old 01-07-2015, 02:25 PM   #8
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Originally Posted by dobber13 View Post
Looking at the picture 1 wire (white) isn't connected to coil and if all your electrical connections and grounds look that bad they all need to be cleaned up. Check for vacuum leaks(dry rot hoses)intake gasket,injector O rings.Check by spraying break cleaner on them but not on exhaust side.
I guess what we need to know is what have you done so far.
Charlie
I just ASSUMED that the OP had that (grey, not white) wire off in the pic, but, has it hooked up now. If not, that is the problem. That is what triggers the coil. It is coming from the ignition box and also goes back to the computer to turn on the fuel pumps via. an RPM signal. The engine won't even run if that wire is disconnected. If it is off and just resting against the coil terminal, that would cause the symptoms the OP is experiencing.
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Old 01-07-2015, 02:58 PM   #9
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I have no idea what car the picture came from.

On my 1988 244 GL, a similar plug is the test point for the AMM adjustment and a ground that that closes down the IAC.
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Old 01-07-2015, 03:29 PM   #10
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I have no idea what car the picture came from.

On my 1988 244 GL, a similar plug is the test point for the AMM adjustment and a ground that that closes down the IAC.
That's what I recall as well, from my '87. Back when it was stock, I used that method to set idle once.

I believe there was also a pink plug like that, which when grounded, would fry the ECU. It was meant for testing, but if not used properly, could do damage.

Read the manual before you ground any unused plug.
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Old 01-07-2015, 07:33 PM   #11
Michael T
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Quote:
Originally Posted by dobber13 View Post
Looking at the picture 1 wire (white) isn't connected to coil and if all your electrical connections and grounds look that bad they all need to be cleaned up. Check for vacuum leaks(dry rot hoses)intake gasket,injector O rings.Check by spraying break cleaner on them but not on exhaust side.
I guess what we need to know is what have you done so far.
Charlie
Quote:
Originally Posted by 2manyturbos View Post
I just ASSUMED that the OP had that (grey, not white) wire off in the pic, but, has it hooked up now. If not, that is the problem. That is what triggers the coil. It is coming from the ignition box and also goes back to the computer to turn on the fuel pumps via. an RPM signal. The engine won't even run if that wire is disconnected. If it is off and just resting against the coil terminal, that would cause the symptoms the OP is experiencing.
Thanks, I'll check it out tomorrow.

I've done

Air Filter
Spark plugs
Spark plug wires
Distributor cap

Most of the vacuum lines look redone to me. They are way too new looking to be original.
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