Vehicle - Warm Temperature Driveability Summary
88chevy12Number: 87-286-6E
Section: 6E
Date: April, 1988
Subject: DRIVEABILITY SUMMARY - WARM AMBIENTS
Model and Year: 1982/87 PASSENGER CARS WITH 5.0L LG4
(VIN H) ENGINE OR 5.0L L69 (VIN G) ENGINE
TO: ALL CHEVROLET DEALERS
Some vehicles may exhibit driveability symptoms related to the combination of high ambients, hot soaks and relatively high REED VAPOR PRESSURE (RVP) fuels.
Several bulletins have been issued on this topic and this bulletin is intended as a convenient easy to use summary. As usual, normal service procedures should be utilized to assure that the vehicle is set to specifications before proceeding to use the service procedures recommended on the reverse of this bulletin.
WARM AMBIENT DRIVEABILITY SUMMARY
1. Surge After Hot Soak Which Is Eliminated When The EVAP Canister Is Disconnected. *Use only on applications listed on the appropriate reference bulletin. This delay harness should not be used on 1987 and new model vehicles that are equipped with closed loop purge systems.
SERVICE VEHICLE REFERENCE
PROCEDURE LINE BULLETIN #
* Canister Caprice 86-238
Purge Delay Camaro
Harness Asm. Monte Carlo
El Camino
2. Surge After Hot Soak Which Is Not Eliminated When The EVAP Canister Is Disconnected.
Free Flow Caprice 86-222
Carburetor Camaro
main metering Monte Carlo
Jets El Camino
3. Surge After Hot soak Which Is Not Eliminated When The EVAP Canister Is Disconnected And Free Flow Carb Main Metering Jets Have Been Installed.
Carb. Blower Camaro 87-131
Fan Kit
4. Deep Sag At Wide Open Throttle (WOT) Normally Occurring At High RPM/Or Near Shift Points On Automatics.
In Tank Camaro 84-174
Electric Fuel Pump kit
5. Tip In Hesitation On A Warm Engine.
Accelerator Camaro 87-279-6E
Pump Check Ball Spring Kit
Use Labor Operations and Labor Times Published In Bulletins Referenced.