1984 CARBURETOR ADJUSTMENT SPEC. REVISIONS. Buick Riviera 1984

MODELS AFFECTED: ALL 1984 MODELS WITH E4ME AMD E4MC CARBURETORS

Attached is a set of revised 1984 Carburetor Adjustment Specifications dated March '84. Please insert the new page in the original set sent in May, '83.

The asterisk specs indicate latest changes.

1984 ADJUSTMENT SPECIFICATIONS - E4ME - E4MC

SPECIFICATIONS GIVEN IN INCHES

RICH FLOAT LEAN MIXT. IDLE IDLE ENG CARB. SETTING MIXT. SCREW MIXT. AIR ENG. CODE NUMBER +/- 2/32" SCREW +/-2/32" NEEDLE BLEED ---- ---- ------ -------- ----- -------- ------ ----- 4.1L 4 17084240 10/32 1.304G 4/32 Note 1 1.756G 4.1L 4 17084244 10/32 1.304G 4/32 Note 1 1.756G 4.1L 4 17084246 10/32 1.304G 4/32 Note 1 1.756G 5.0L Y 17084252 14/32 1.304G 4/32 Note 1 1.756G 5.0L Y 17084254 14/32 1.304G 4/32 Note 1 1.756G 5.0L Y 17084256 11/32 1.304G 4/32 Note 1 1.756G 5.0L Y 17084258 11/32 1.304G 4/32 Note 1 1.756G

CHOKE VAC. VAC. AIR CHOKE LINK BREAK BREAK VALVE STAT CAM FRONT REAR SPRING LEVER +/- 2.5 DEG. +/- 2.5 DEG. +/- 3.5 DEG. ------ ------ ----------- ------------ ------------ 1 .120G 24.5 DEG. 24 DEG. - 1 .120G 24.5 DEG. 24 DEG. - 1 .120G 24.5 DEG. 22 DEG. 24 DEG. 1/2 .120G 14 DEG. 27 DEG. 41 DEG. 1/2 .120G 14 DEG. 27 DEG. 41 DEG. 1/2 .120G 14 DEG. 25 DEG. 41 DEG. 1/2 .120G 14 DEG. 25 DEG. 41 DEG.

AIR UN- VALVE LOADER LINK +/- 4 DEG. ---- ---------- .025 32 DEG. .025 32 DEG. .025 32 DEG. .025 36 DEG. .025 36 DEG. .025 36 DEG. .025 36 DEG.

MIN.* MAX.* AUTH. AUTH. TPS ENG. ENG. CODE +/- 25 RPM +/- 50 RPM +/- .1 VOLT ---- --------- ---------- ---------- ----------- 4.1L 4 470 In Drive 900 In Drive .57 Volt with ISC retraced and min.auth set to spec.

5.0L Y 500 In Drive 725 In Drive .41 Volt at 500 RPM in drive

Note 1. Preset 3 turns, final adjustment on vehicle

2. G = Gage

3. Secondary look out .015

* Drive wheels locked - parking brake applied (see ISC or ILC adjustment prcedure).

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.