Engine - Spark Knock During Acceleration
84chrysler8Models
1982-1/2 Federal & All 1983-1984 2.2L-2BBL Passenger Cars (Except Shelby); 1983-1984 California & 1984 Federal High Altitude Trucks
Subject
Acceleration Spark Knock
Index
ELECTRICAL
Date
April 9, 1984
No..
14-03-84
P-1424-C
SYMPTOM/CONDITION
Spark knock during light to medium acceleration
PARTS REOUIRED
1 - Driveability Package PN 4293900
Package contains the following parts:
1 - 1.5" Vacuum Reducer Valve PN 4275688
1 - Foam Pad NPN
2 - Tie Wraps NPN
1 - Hose Routing Label PN 4179824
Must be ordered separately:
1 - Authorized Modification Label PN 4275086
INSTALLATION PROCEDURE
1. Remove air cleaner crossover and air filter element. Remove air cleaner box from engine.
FIGURE 1-B:
2. Drill two 3/8" diameter holes in the air cleaner box per attached drawing (Figure 1B). Hole locations must be as close to drawing dimensions as possible.
3. Remove the backing paper from the foam pad to expose adhesive.
Install foam pad in the air cleaner box per the attached drawing. The pads should cover the previously drilled hole in the air cleaner front face and provide a cushion for the reducer valve.
Make a hole in the foam pad large enough to pass a 3/16" vacuum hose through.
4. Remove existing hose from manifold vacuum supply to ESA/EFC module (or on models with a vacuum tee near the module, just remove hose up to the inlet of tee).
5. Measure the distance from the hole in the air cleaner (with the foam pad) to the manifold vacuum supply connection and cut a suitable length of 3/16" Bulk Vacuum Hose, PN 4105167, making sure there will be enough hose for proper routing.
6. Place the 1-1/2" Vacuum Reducer Valve, PN 4275688, inside the air cleaner box.
Route the 3/16" vacuum hose from the manifold vacuum supply through the 3/8" hole and foam pad into the nipple marked "Vac" of the vacuum reducer valve.
FIGURE 1-A:
FIGURE 1-B:
Draw the vacuum hose from the air cleaner until the reducer valve is firmly against the foam pad. Secure outside air cleaner box with a tie wrap (Figures 1A and 1B).
7. Measure the distance from the ESA/EFC vacuum nipple (or from the vacuum tee near the module) to the other nipple of the vacuum reducer (next to the foam filter) valve.
8. Cut a suitable length of 3/16" Bulk Vacuum Hose, PN 4105167, making sure there will be enough hose for proper routing. Connect the 3/16" vacuum hose at the ESA (or the "tee" near the module) and route it through the other 3/8" hole drilled into the air cleaner box (Figures 1A and 1B).
Secure vacuum hose onto the vacuum reducer valve at the nipple next to the vacuum reducer foam filter (Figure 1A).
Rotate the reducer valve if necessary. Route the vacuum hose and secure with a tie wrap on the inside of the air cleaner as shown on the attached drawing (Figures 1A and 1B).
9. Replace air cleaner box, filter element, and crossover assembly. Be sure the vacuum reducer valve is secure and there is no interference inside the air cleaner box.
10. Start engine and allow to fully warm up.
Reduce VECI label basic timing by 4~. Set basic timing to the new reduced specification using correct service manual procedures.
11. California Emission Only: Wipe existing vacuum hose routing label clean and install supplied label (PN 4179824) over it.
FIGURE 2:
12. Type the following information on the Authorized Modification Label PN 4275086 (Figure 2).
Upper Section
"Driveability Kit PN 4293900 Installed."
"Reduced Basic Timing 4~."
Lower Section
Change Authority - TSB 14-03-84.
Dealer Code - your dealer code.
Date - date this service performed.
13. Install this label next to or near the original VECI label.
This bulletin is released in advance of parts availability. The parts listed in this bulletin will be available in early May, 1984.
POLICY: Reimbursable within the provisions of the warranty
TIME ALLOWANCE:
Labor Operation No. 08-15-01-90..................... 0.6 Hrs.
FAILURE CODE: AM - Authorized Modification