POWER LOSS, HESITATION,LOSS OF CRUISE(CORR. OBVIOUS PINCHING)

SUBJECT: LOSS OF POWER, HESITATION, LOSS OF CRUISE SET SPEED ON HIGHWAY

MODELS AFFECTED: 1993 ELDORADOS AND SEVILLES

Some 1993 Eldorados and Sevilles may exhibit loss of power, hesitation, or loss of cruise set speed during driving. This condition may be caused by a reduction in fuel supply. This reduction in fuel supply may be verified by monitoring fuel pressure during the condition. A drop in fuel pressure will be noted.

Examination of the modular fuel sender may reveal evidence of the convoluted fuel feed tube having been pinched or restricted. This is caused by excessive vacuum level in the fuel tank which results in fuel tank collapse.

Inspect the canister fresh air vent pipe for restriction or pinching as follows:

Northstar Equipped Vehicle - At the air/water separator (mounted on the rear suspension) check the rubber elbow for either the separator nipple or nylon vent pipe being inserted too-far into the elbow. Adjust nipple or pipe as necessary to eliminate the restriction. Refer to Figure 1.

4.9L Equipped Vehicle - Correct any obvious pinching or restriction in the vent pipe. Refer to Figure 2.

Replace the sender assembly with revised sender, P/N 25028545.

Parts are currently available from GMSPO.

For warranty purposes use Labor Operation T6707 at 1.4 hours.

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.