Econoline E250 3/4 Ton V6-4.2L VIN 2 (1998)
EGR Valve: Customer Interest
EGR Valve - MIL ON/DTC's P0306 Set/Hesitation
ARTICLE NO.
00-6-8
DATE:
March 20, 2000
SUBJECT:
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HESITATION/MISFIRE - DURING ACCELERATION OFF IDLE - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH
DIAGNOSTIC TROUBLE CODE (DTC) P0305 AND/OR P0306 STORED IN MEMORY - 4.2L VEHICLES
^
MALFUNCTION INDICATOR LAMP (MIL) - ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE (DTC) P0305 AND/OR P0306
STORED IN MEMORY - 4.2L VEHICLES
^
LAMP-MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE (DTC) P0305 AND/OR P0306
STORED IN MEMORY - 4.2L VEHICLES
FORD:
1998-1999 ECONOLINE
ISSUE
A hesitation on acceleration just off idle and/or misfire concerns may be present on some vehicles accompanied with a Malfunction Indicator Lamp
(MIL) illuminated and Diagnostic Trouble Codes (DTCs) P0305 or P0306 stored in memory. This condition may be the result of carbon contamination
in the Exhaust Gas Recirculation (EGR) ports in the lower intake manifold. This is NOT a low odometer issue and most vehicles have accumulated well
over 80,000 kilometers (50,000 miles) before this condition is exhibited. This condition has been observed mostly on vehicles used in commercial
applications that are subjected to extended idle conditions, high sulfur content fuel, and/or extended oil change intervals.
ACTION
Follow normal diagnostics for misfire codes and hesitation in the appropriate year Powertrain Control/Emissions Diagnosis (PC/ED) Service Manual to
ensure that all other systems are operating normally. If the concern is not resolved after normal diagnosis, refer to the following Service Procedure.
SERVICE PROCEDURE
1.
Perform normal diagnostics for misfire codes and for hesitation concerns including Pinpoint Tests found in the PC/ED Service Manual. Take
corrective action as indicated by diagnostics.
2.
If concern has not been corrected in Step 1, remove vacuum signal hose to the EGR valve, cap off hose, and increase engine rpm off idle to
determine if condition is corrected.
3.
If Step 2 corrects the condition with EGR disconnected, remove the upper intake manifold ONLY and inspect EGR ports for carbon
contamination. If contamination is present that could disrupt EGR flow (some contamination is normal), clean all ports using a pick and solvent.
To service the upper and lower intake manifolds, refer to the appropriate year Econoline Workshop Manual.
NOTE:
DO NOT REMOVE UPPER INTAKE MANIFOLD UNTIL SERVICE PROCEDURE HAS BEEN COMPLETED. FIELD EXPERIENCE SHOWS
THAT CARBON CONTAMINATION OCCURS IN ONLY A FEW INSTANCES.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage
OPERATION
DESCRIPTION
TIME
000608A
Clean EGR Ports (Includes
1.3 Hr.
Time To Remove Upper
Intake Manifold)
DEALER CODING
CONDITION
BASIC PART NO.
CODE
9424
42
OASIS CODES: 609000, 609400, 609500, 609600, 611000, 611500, 698298
