Alternator R/R-Gaskets - ZR-1 Net Registry Forums

ZR1HOTC4 · 08-27-2006

Looks like I have the flickering lights, bouncing amp meter gauge syndrome. I did a test on the alternator and it appears to be bad. I just R/R'ed the plenum for a tuneup and replacement of some bad injectors. The plenum has been on only one week. Would I need to get new plenum gaskets, again? or can I carefully lift the plenum, do the alternator swap and reuse the gaskets? Any recommendations on Alternators or should I try to rebuild it and the voltage regulator?
Thanks, Dave

We Gone · 08-28-2006

I changed the one on the 90 I used to have and only removed the horn from the front of the TB

Bill · 08-28-2006

Mine quit while on a cross country trip. Like We Gone the mechanic was able to replace it by removing the front section. Be careful there is a gasket there also.
Good Luck

ZR1HOTC4 · 08-29-2006

I just took the air horn off (carefully), took the bolts out of both brackets and removed them completely from the engine. Then came the oil sensor. It has to be removed with an extra long 27mm socket. The correct tool would make it a snap, but some channel locks were just enough to loosen it to take it out by hand. Disconnected all the wiring and out it came from the front. Thanks for the suggestions.

I hope this fixes the flickering and the bouncing voltmeter.

We shall see!

ZR1HOTC4 · 08-29-2006

Ok, had the alternator bench tested and it tested GOOD. Great, now I'm an expert at alternator R/R.

So, to add to the indications... the flickering lights are now not flickering - they are out completely. When the ignition switch is turned ON the system goes through it's preparatory sequence and the dash instruments are bright as usual, but when they are suppose to go to the dim normal intensity after the sequence they all go out!

The car does run. Am I now looking for the elusive Body Control Module or Central Control Module as its listed in the manual? Hummmmm... Suggestions. Thanks Dave

Bill · 08-29-2006

Are you noticing the problem while in the garage? This got my attention also, it was the ambient light in the garage was to low. Does the dash light up when you turn the head lights on? If so try this, With the head lights off shine a flash light into the light sensor. On my â€™90 it is just to the left of the words â€œtrip monitorâ€ on the IP. I hope this is all it is.
Good Luck

08-27-2006	#1
ZR1HOTC4 Join Date: Jun 2006 Location: Santa Maria, Ca Posts: 8	Alternator R/R-Gaskets Looks like I have the flickering lights, bouncing amp meter gauge syndrome. I did a test on the alternator and it appears to be bad. I just R/R'ed the plenum for a tuneup and replacement of some bad injectors. The plenum has been on only one week. Would I need to get new plenum gaskets, again? or can I carefully lift the plenum, do the alternator swap and reuse the gaskets? Any recommendations on Alternators or should I try to rebuild it and the voltage regulator? Thanks, Dave

08-28-2006	#2
We Gone Join Date: Apr 2004 Location: Atlanta, GA Posts: 2,170	Re: Alternator R/R-Gaskets I changed the one on the 90 I used to have and only removed the horn from the front of the TB __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

08-28-2006	#3
Bill Join Date: Mar 2004 Location: Sacramento, CA. Posts: 141	Re: Alternator R/R-Gaskets Mine quit while on a cross country trip. Like We Gone the mechanic was able to replace it by removing the front section. Be careful there is a gasket there also. Good Luck

08-29-2006	#4
ZR1HOTC4 Join Date: Jun 2006 Location: Santa Maria, Ca Posts: 8	Re: Alternator R/R-Gaskets I just took the air horn off (carefully), took the bolts out of both brackets and removed them completely from the engine. Then came the oil sensor. It has to be removed with an extra long 27mm socket. The correct tool would make it a snap, but some channel locks were just enough to loosen it to take it out by hand. Disconnected all the wiring and out it came from the front. Thanks for the suggestions. I hope this fixes the flickering and the bouncing voltmeter. We shall see!

08-29-2006	#5
ZR1HOTC4 Join Date: Jun 2006 Location: Santa Maria, Ca Posts: 8	Re: Alternator R/R-Gaskets Ok, had the alternator bench tested and it tested GOOD. Great, now I'm an expert at alternator R/R. So, to add to the indications... the flickering lights are now not flickering - they are out completely. When the ignition switch is turned ON the system goes through it's preparatory sequence and the dash instruments are bright as usual, but when they are suppose to go to the dim normal intensity after the sequence they all go out! The car does run. Am I now looking for the elusive Body Control Module or Central Control Module as its listed in the manual? Hummmmm... Suggestions. Thanks Dave

08-29-2006	#6
Bill Join Date: Mar 2004 Location: Sacramento, CA. Posts: 141	Re: Alternator R/R-Gaskets Are you noticing the problem while in the garage? This got my attention also, it was the ambient light in the garage was to low. Does the dash light up when you turn the head lights on? If so try this, With the head lights off shine a flash light into the light sensor. On my â€™90 it is just to the left of the words â€œtrip monitorâ€ on the IP. I hope this is all it is. Good Luck