5.8l. Why is timing erratic?

Change the fuel pump its faulty.

Provided that the engine is in good condition (nothing like a pulled stud) Start with the points (0.4mm) Now reset the timing to 5 degrees advance - static. Then Set the valves (0.15mm) Make sure the carburetor is clean and correctly set. To set it, warm up the motor to operating temperature, set the idle at 750 rpm an screw the volume control screw out a few turns. Then screw it back in slowly till you notice the rpms start to drop. Then back it out an 1/8 of a turn to a 1/4 of a turn. Now set the idle at 700 rpm again. It may be wise to check that the butterfly valve shaft has not worn the carburetor. If that happens the engine will run erratically due to the motor receiving a false air supply.

serial number/keygen for registry reviver

EW-32 Timer BLUE BUTTONS only
Generic/Chevron/Sansai/Belkin/Essentials etc
Functions/buttons may differ if not blue.

Simplified instructions

A-Pre Setup
1.Charge for 12 hours before setup
or unused for a long time
2.Press "R" (pinhole) to reset

B-Set current day/time
1.Press "SET" for 3 seconds
2.Press "+" or "-" to select
3.Press "SET" to save
4.Repeat for Hours & Minutes

C-Daylight Saving Time
1.Press "Time" and "-"

D-12/24hr mode
1.Press "Time" for 3 seconds

E-Program ON Time
1.Press "+"
2.Press "SET"
3.Press "+" or "-" to set Day
4.Press "SET" to save
5.Repeat for Hours & Minutes

F-Program OFF Time
1.Press "+" within 10 seconds and
repeat as above"
2.Press Auto/On/Off to start/stop program.


G-Count Down Timer
1.Press "-"
2.Press "CDT"
3.Press "SET"
4.Press "+" or "-" to set
5.Repeat for Minutes & Seconds
6.Press "CDT" to display AUTO ON
7.Press "CDT" again to Pause/Stop

H-RANDOM timer
1.Press "RND"
2 to 32 Minutes timer and also
depends on settings above

I-Manual ON/OFF/OVERRIDE
1.Press "ON/AUTO/OFF"

Mine is Chevron 2400 watts (10A)switching capacity and about 10 years old, and still works perfectly, including original back-up battery.

Good Luck.

Hello lysiphlebus2,

((My thoughts: cold START valve IAC at very bottom))

Plenty of places will do FREE diagnostic code reads.

I would rather suggest it be a muffler shop than
AUTOZONE... but either is better than guessing.

AUTOZONE will likely make you buy OXYGEN
sensors... (but that makes about as much sense as
buying a new THERMOMETER every-time you
have a FEVER.

What you are describing sounds (from an old
mechanic's perspective) like a collapsing
catalytic convertor or rotted muffler baffle
(a slightly better blockage will halt operation
completely)...

((again speculation... get your codes read))...

Do not buy OXYGEN SENSORS....

Know your prices before waltzing into any
exhaust shop.

AMAZON
1 24 of 108 results for Automotive 1995 riviera catalytic 1995 riviera...

rockauto
1995 BUICK RIVIERA 3 8L V6 Supercharged Catalytic Converter RockAuto

IAC (cold start valve)
1995 BUICK RIVIERA 3 8L V6 Supercharged Idle Air Control IAC Valve RockAuto

Hope this helps

Carnac the Magnificent

There are three buttons, let's call them 1, 2, and 3, from left to right.


Clock
Time setting

A. 12 AM, PM or 24.00 h
With the clock in the time readout mode, keep
button (2) depressed for 4 seconds -12 AM, PM
or 24.00 flashing. After pushing button (1), either
a 12-hour (AM + PM) or a 24-hour setting
program can be selected. If you only want to
change the display mode, push button (3). The
clock then returns to its normal timekeeping
function.

B. Hours
Push button (2) a second time - hour display
flashes. Set hour by pushing button (1). After
pushing button (3)*, the clock returns to the time
readout mode with new hour setting.

C. Minutes
Push button (2) once more - minute display
flashes. Set minute by pushing button (1). Upon
pushing button (3)*, the clock is started -
accurate to within 1 second.

Stop watch function
The stop watch can only be set in motion if the
clock is in its normal timekeeping mode and not
during setting operations.
A. Push button (3) - 00:00 display appears;
B. Push button (1) - stop watch is on;
C. Push button (1) a second time - watch stops.
(Additional times can be added by pushing button
(1) again - stop watch keeps running. Push button
(1) once more to stop timing.)
D. Push button (2) - 00:00 display appears;
E. Push button (3) - normal timekeeping mode.

If button (3) is pushed during operation A and
B, the setting procedure must be restarted
(push button (2)).

for the oil pressure guage issue you need to change the oil pressure sending unit.

sound like your getting water in the gas, or out of time. check the timming.