January 1970 - December 1970

Bulletin No. 141 - May 29, 1970

CARBURETOR AND IGNITION SYSTEM - DRIVEABILITY PROBLEM DIAGNOSIS GUIDE

This guide combines all recent information bearing on driveability problems. It cover diagnosis and adjustment on repairs of hesitation on acceleration, surge, hard hot or cold start and dieseling. note the emphasis on instructing drivers that the ignition must be turned "ON" before pressing accelerator down when starting. Because of increased complexity, correct starting procedures and maintenance to specification is extremely important.

DETAILED CORRECTIVE ARTICLES:
  • Art. 1 - Spark Plug Installation Chart - Revision - (All Cars Equipped with 351-4V Engines - 1970)
  • Art. 2 - Induction System Vacuum Leak with Rocker Arm Covers Removed - (All 429 CID Cobra Jet Engines
  • Art. 3 - Carburetor - 1V Rough Idle or Vacuum Leaks - (All Units with 170 or 200 CID Engine and Carter YF-1V - 1970)
  • Art. 4 - 2V Carburetor Stumble and Hesitation - (All Lines - 1969 w/302, 351, 390 and 429 CID Engines w/2V Carburetors and Automatic Transmissions)
  • Art. 5 - Carburetor - Stalling or Stumbling During the First Few Miles of Cold Weather operation - 351C-2V - (Torino and Mustangs with 351C-2V Engines - 1970)
  • Art. 6 - Carburetor Hesitation on Light Throttle During Warm Weather - 429 CID-4V - (Passenger Cars with Automatic Transmission - early 1970)
  • Art. 7 - Engine - Troubleshooting the Distributor-Modulator System - (Units Equipped with the Disto-Vac System)
  • Art. 8 - Hard Cold Starting - (F100 and Bronco with 6 Cylinder Engine - 1970)
  • Art. 9 - 2V Carburetor - 390 Hard Cold Start - (Ford - 1969)
  • Art. 10 - Engine - 302-390 - "Dieseling" or Engine Continues to Run After Shut-Off - (All units Equipped with A/C - 1968 and 1969)
  • Art. 11 - Engine Detonation and/or Pre-Ignition - (All Engines)
  • Art. 12 - Engine - Spark Knock on Midrange Light Acceleration - (Mustang, Fairlane 2/250 CID and Automatic Transmission - 1969)
  • Art. 13 - Engine Detonation Under Acceleration - (Vehicles Equipped with 429-2V and 429-4V CID Engines except 429 CJ and 429 SCJ - 1970)
  • Art. 14 - Fuel Tank Contamination Due to Rust and/or Corrosion - (190 Passenger Cars Built Prior to December 31, 1969)
  • Art. 15) - Fuel Restriction or Fuel Starvation From Water and/or Dust Entering the Fuel Tank Through the Fuel Filler Vent Notch - (Maverick Without Evaporative Emissions System - 1970)
  • Art. 16 - Accelerator Linkage - Slow Return to Idle - (Maverick, Mustang, Fairlane - 1969)
  • Art. 17 - Carburetor - 250CID - Dashpot Removal - (Fairlane and Mustang with Automatic Transmission - 1969)
  • Art. 18 - Accelerator Pedal Response Improvement - (1968-1969 Fairlane with 302 or 351 CID Engines Regardless of Transmission)

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