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Author Topic: Blinking lights / volt flutter  (Read 2295 times)

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Offline TurboCajun

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Blinking lights / volt flutter
« on: August 11 2014, 12:48:47 PM »
I have always seen the light near the ecm and dome light flicker when at idle, but now it seems to have gotten worse and I can see my fuel pressure gauge flutter also. so if the FP gauge is fluttering that means the pump is also. my voltage is never steady, could it be the alternator?
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85 GN -- Converted to 87 set-up using 66/72 turbo, front mount I/C, 80lb injectors,gn1 heads 14 bolt 1.65 roller rockers stud mount, ported intake with plate, fuel hot wire, 3" dp, running 24psi., alky kit, stroker 20 over, 212/206 roller,  best time 10.995 @ 121 1.56 60ft

Offline Steve Wood

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Re: Blinking lights / volt flutter
« Reply #1 on: August 11 2014, 02:13:42 PM »
Check the voltage coming out of the back of the alternator to see if is erratic
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Steve Wood

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Offline earlbrown

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Re: Blinking lights / volt flutter
« Reply #2 on: August 11 2014, 02:52:35 PM »
and if you're fuel pressure gauge is electric, it could be the gauge giving a false reading.   Or both the gauge or the pump.


since these cars pretty much run on electricity, this is a good warning shot to start investigating bad connections.
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Offline TurboCajun

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Re: Blinking lights / volt flutter
« Reply #3 on: August 11 2014, 04:51:36 PM »
It is NOT steady at the alt. ,it will jump from 13.3 to 14.4 to 13.4 and so on, scan master reading are the same and I think the the flutter is a lil to fast for the scan master digital read out to keep up with, so it is very inconsistent,  and its a steady flutter with the lights,
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85 GN -- Converted to 87 set-up using 66/72 turbo, front mount I/C, 80lb injectors,gn1 heads 14 bolt 1.65 roller rockers stud mount, ported intake with plate, fuel hot wire, 3" dp, running 24psi., alky kit, stroker 20 over, 212/206 roller,  best time 10.995 @ 121 1.56 60ft

Offline Steve Wood

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Re: Blinking lights / volt flutter
« Reply #4 on: August 11 2014, 05:43:58 PM »
If you have a good ground on the alternator case and a good contact to the terminal on the back and see flutter on your voltmeter, then it would appear it's bad
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A lot of broken parts does not make you a racer; it makes you a slow learner.
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