« previous next »
Pages: [1]   Go Down

Author Topic: Blinking lights / volt flutter  (Read 2290 times)

0 Members and 1 Guest are viewing this topic.

Offline TurboCajun

  • Keith Theriot
  • Turbo Street Modified
  • *****
  • Posts: 324
  • PSI: 1
  • 6 Packed
    • View Profile
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?
Logged
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

  • Turbo Street Outlaw
  • *******
  • Posts: 9950
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
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
Logged
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline earlbrown

  • Turbo Street Eliminator
  • ******
  • Posts: 1571
  • PSI: 6
    • View Profile
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.
Logged
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline TurboCajun

  • Keith Theriot
  • Turbo Street Modified
  • *****
  • Posts: 324
  • PSI: 1
  • 6 Packed
    • View Profile
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,
Logged
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

  • Turbo Street Outlaw
  • *******
  • Posts: 9950
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
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
Logged
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.
Pages: [1]   Go Up
« previous next »
 
SimplePortal 2.3.7 © 2008-2024, SimplePortal