flickering dash - Page 2 - ZR-1 Net Registry Forums

csavaglio · 09-16-2014

Well, a couple days and about 150 miles and I haven't seen the flicker. I don't want to jinx it, but it seems like the battery did it. I'm surprised, because it never didn't have any other issues.....it always started fine and everything.

Chris

Fully Vetted · 09-16-2014

Mine did it until I replaced my battery about a month ago.

Schrade · 09-16-2014

New battery fixes dash flicker.

Sounds good to me; but I'd sure like to know how THAT works

Any electronics gurus here, can 'splain it??? Given ALL grounds are correct.......

Gotta' have somethin' to do with pulse width modulation?

Billy Mild · 09-16-2014

Quote:

Originally Posted by Schrade

New battery fixes dash flicker.

Sounds good to me; but I'd sure like to know how THAT works

Any electronics gurus here, can 'splain it??? Given ALL grounds are correct.......

Gotta' have somethin' to do with pulse width modulation?

Take the battery terminals off and spray them liberally with some battery cleaner. Then spray some of the battery cleaner in the bolt hole. That should give you a nice clean connection.

batchman · 09-16-2014

I have found that when I get dash flickering (remembering I use a battery 1/4 the size of most) if I jiggle the "dimmer" it stabilizes, seems like a noisy pot in a circuit sensitive to signal to noise ie lower signal (battery V) same noise = higher ratio (maybe it is PWM). Moving the pot reduces the noise.

HTH,
- Jeff

csavaglio · 09-17-2014

Well, guys, I just made the move from Las Cruces to Colorado Springs....about 550 miles...in the LT4. The first half was in pouring rain with the lights on. No flicker.....

I'm gonna pronounce the flicker fixed.

Great suggestion on the battery. I've had previous cars do weird things when the headlight switches get iffy too, which I why it was my first thought after checking all the cable connections.

If I were the OP, I'd give the battery a shot. Worst case is it's good peace of mind having a fresh one in the car.

Chris

Franke · 09-17-2014

Quote:

Originally Posted by csavaglio

Well, guys, I just made the move from Las Cruces to Colorado Springs....about 550 miles...in the LT4. The first half was in pouring rain with the lights on. No flicker.....

I'm gonna pronounce the flicker fixed.

Great suggestion on the battery. I've had previous cars do weird things when the headlight switches get iffy too, which I why it was my first thought after checking all the cable connections.

If I were the OP, I'd give the battery a shot. Worst case is it's good peace of mind having a fresh one in the car.

Chris

Welcome back to Colorado O'wise one!

8cam · 09-19-2014

I know I replied to this thread, but apparently it flew into the ether somewhere. My battery is about 18 months old and since I drive the car almost every day, it should be in good shape. I'll check it with a real meter this afternoon. The only time I notice this flicker is at idle, usually when the a/c is running but I have seen it with the a/c off too. I've had voltage regulators fail before, but those really show symptoms when running. I wasn't sure if this flicker might be an early sign.

I have noticed that my a/c compressor creates a LOT of load on the engine, and it does make some noise. For such a big powerful engine, I wouldn't think the compressor would cause much of an impact. But it's definitely noticable - the engine is nowhere near as lively with the a/c on. So my other thought was compressor bearings on the way out, creating too much drag on the engine.

Roadster · 09-20-2014

Quote:

Originally Posted by 8cam

I know I replied to this thread, but apparently it flew into the ether somewhere. My battery is about 18 months old and since I drive the car almost every day, it should be in good shape. I'll check it with a real meter this afternoon. The only time I notice this flicker is at idle, usually when the a/c is running but I have seen it with the a/c off too. I've had voltage regulators fail before, but those really show symptoms when running. I wasn't sure if this flicker might be an early sign.

I have noticed that my a/c compressor creates a LOT of load on the engine, and it does make some noise. For such a big powerful engine, I wouldn't think the compressor would cause much of an impact. But it's definitely noticable - the engine is nowhere near as lively with the a/c on. So my other thought was compressor bearings on the way out, creating too much drag on the engine.

We just got back from a 300 mile trip from Gettysburg with the ZR-1 and the flicker is still there slightly but once I am moving, it goes away, and doesn't seem to return. The A/C works great and my engine runs just as good with the A/C on or off, I haven't notice a difference in power or performance either way. It just gets up and goes when needed......

09-16-2014	#11
csavaglio Join Date: Oct 2013 Location: Colorado Springs, CO Posts: 160	Re: flickering dash Well, a couple days and about 150 miles and I haven't seen the flicker. I don't want to jinx it, but it seems like the battery did it. I'm surprised, because it never didn't have any other issues.....it always started fine and everything. Chris

09-16-2014	#12
Fully Vetted Join Date: Sep 2012 Location: Rockwall, Tx Posts: 1,510	Re: flickering dash Mine did it until I replaced my battery about a month ago. __________________ _________________ 1994 AB/Grey #141 430 RWHP/392 RWTQ FBI Lyposuction / Secondaries relieved of duty / SW Long Tube Headers / Corsa Exhaust / FIC SS Injectors / MSD Coils / Lightweight Pulleys / Corey tuned B & M Shifter / Aluminum Flywheel / Samco Hoses / Shelby Series One's / C4 No Flex Frame Stiffener BBC - Bling By Carter: Custom ZR-1 Center Caps / Custom Plenum Plate / Air Box Knobs / TB Cover / Oil Filter Cover

09-16-2014	#13
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: flickering dash New battery fixes dash flicker. Sounds good to me; but I'd sure like to know how *THAT* works Any electronics gurus here, can 'splain it??? Given ALL grounds are correct....... Gotta' have somethin' to do with pulse width modulation? __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

09-16-2014	#15
batchman Join Date: Jun 2009 Location: I live at Devens, one run at a time Posts: 455	Re: flickering dash I have found that when I get dash flickering (remembering I use a battery 1/4 the size of most) if I jiggle the "dimmer" it stabilizes, seems like a noisy pot in a circuit sensitive to signal to noise ie lower signal (battery V) same noise = higher ratio (maybe it is PWM). Moving the pot reduces the noise. HTH, - Jeff __________________ [I]91 ZR-1 #1840, autocrossing in SCCA BSP. FIC S/S's DRM chip/Watson/Borla/lid/LW batt&headlights, springs, shocks, pads & lines, quick rack & Turn One, camber brace, 32/22mm sways, A/C halfway deleted 17x11 & 12 CCW's, 315 & 335 Hoosier A6s [/I]

09-17-2014	#16
csavaglio Join Date: Oct 2013 Location: Colorado Springs, CO Posts: 160	Re: flickering dash Well, guys, I just made the move from Las Cruces to Colorado Springs....about 550 miles...in the LT4. The first half was in pouring rain with the lights on. No flicker..... I'm gonna pronounce the flicker fixed. Great suggestion on the battery. I've had previous cars do weird things when the headlight switches get iffy too, which I why it was my first thought after checking all the cable connections. If I were the OP, I'd give the battery a shot. Worst case is it's good peace of mind having a fresh one in the car. Chris

09-19-2014	#18
8cam Join Date: Jul 2013 Location: Atlanta Posts: 451	Re: flickering dash I know I replied to this thread, but apparently it flew into the ether somewhere. My battery is about 18 months old and since I drive the car almost every day, it should be in good shape. I'll check it with a real meter this afternoon. The only time I notice this flicker is at idle, usually when the a/c is running but I have seen it with the a/c off too. I've had voltage regulators fail before, but those really show symptoms when running. I wasn't sure if this flicker might be an early sign. I have noticed that my a/c compressor creates a LOT of load on the engine, and it does make some noise. For such a big powerful engine, I wouldn't think the compressor would cause much of an impact. But it's definitely noticable - the engine is nowhere near as lively with the a/c on. So my other thought was compressor bearings on the way out, creating too much drag on the engine. __________________ Mark '90 ZR-1 #1322 Daily Driver, 64k and counting Black/Gray [IMG]http://i208.photobucket.com/albums/bb49/mlitherland/IMG_0326_zps3d50d8cb.jpg[/IMG]