TROUBLESHOOTING MANUAL
Contents
1. PRECTEIGN AIRMOTIVE CORPORATION FORM 15 901C 4 30 02 1 of 3 Issued Page INSTALLATION TROUBLESHOOTING CHART RS RSA FUEL INJECTION SYSTEMS NOTES INSTALLATION It Is Absolutely Necessary To Install Servo Flow Divider And Nozzles Per The Engine And Or Airframe Manual For Proper Operation Failure To Do So May Result In Unsatisfactory Operation REMOVAL Before Removing Fuel Injection Components From Engine For Warranty Consideration And After Verifying All Other Components Work Properly Troubleshoot The Following Symptoms PROBLEM PROBABLE CAUSE REMEDY HIGH FUEL FLOW READING STAGGERED MIXTURE CONTROL LEVERS POOR CUT OFF ROUGH ENGINE TURBO CHARGED AND POOR CUT OFF ENGINE WILL NOT ACCELERATE PAST A GIVEN RPM PLUGGED NOZZLE IF HIGH FUEL FLOW IS ACCOMANIED BY LOSS OF POWER AND ROUGHNESS FAULTY GAGE IF TAKEOFF IS SATISFACTORY DO NOT BE TOO CONCERNED ABOUT STAGGERED LEVERS BECAUSE SOME MISALIGNMENT IS NORMAL WITH TWIN ENGINE INSTALLATION IMPROPER RIGGING OF AIRCRAFT LINKAGE TO MIXTURE CONTROL NOZZLE AIR BLEED HOLE S CLOGGED OIL IN AIR CHAMBER REMOVE AND CLEAN NOZZLES A 20 MINUTE SOAK IN HOPPES 9 GUN CLEANING SOLVENT A STODDARD SOLVENT RINSE AND BLOW DRY CHECK SYSTEM FOR SOURCE OF CONTAMINATION CRISS CROSS GAGES AND REPLACE IF NECESSARY IF SINGLE ENGINE REPLACE GAGE CHECK RIGGING ADJUST CLEAN OR REPLACE NOZZLES REFER TO P A C SERVICE INFORM2. REPAIR AS NECESSARY ROUGH ENGINE MIXTURE TOO RICH OR TOO CONFIRM WITH MIXTURE CONTROL A LEAN TOO RICH MIXTURE WILL BE CORRECTED AND ROUGHNESS DECREASED DURING LEAN OUT WHILE A TOO LEAN MIXTURE WILL BE AGGRAVATED AND ROUGHNESS INCREASED ADJUST IDLE TO GIVE A 25 50 RPM RISE 700 RPM PRECTEIGN AIRMOTIVE CORPORATION FORM 15 901C Issued 4 30 02 Page 3 of 3 INSTALLATION TROUBLESHOOTING CHART RS RSA FUEL INJECTION SYSTEMS PROBLEM PROBABLE CAUSE REMEDY ROUGH ENGINE CONTINUED PLUGGED NOZZLE S USUALLY ACCOMPANIED BY HIGH TAKE OFF FUEL FLOW READINGS SLIGHT AIR LEAK INTO INDUCTON SYSTEM THROUGH MANIFOLD DRAIN CHECK VALVE USUALLY ABLE TO ADJUST INITIAL IDLE BUT ROUGH IN 1 000 1 500 RPM RANGE AIR LEAK IN FUEL LINE FROM TANK TO SERVO REMOVE AND CLEAN NOZZLES A 20 MINUTE SOAK IN HOPPES 9 GUN CLEANING SOLVENT RINSE WITH STODDARD SOLVENT AND BLOW DRY CHECK SYSTEM FOR SOURCE OF CONTAMINATION CONFIRM BY TEMPORARILY PLUGGING DRAIN LINE REPLACE CHECK VALVE AS NECESSARY CONFIRM BY CONNECTING CLEAR TUBING BETWEEN SERVO AND FLOW DIVIDER AND WATCH FOR AIR BUBBLES LOCATE AND CORRECT SOURCE OF LEAKAGE MAY INCLUDE BOOST PUMP OR MAIN PUMP SEAL LEAKAGE IF ALL THE ABOVE ITEMS HAVE BEEN ELIMINATED AND THE SERVO IS UNDER WARRANTY IT MUST BE SENT TO AN AUTHORIZED PRECISION AIRMOTIVE PRODUCT SUPPORT CENTERS FOR REPAIRS SEE SIL PAC 1 OR VISIT OUR WEB SITE AT vww precisionairmotive com FOR
3. A COMPLETE LISTING NOTE THE USE OF NON AVIATION GRADE FUEL VOIDS ALL WARRANTIES FOR FURTHER ASSISTANCE PHONE FAX OR WRITE PRECISION AIRMOTIVE CORPORATION PRODUCT SUPPORT DEPARTMENT 14800 40 AVENUE N E MARYSVILLE WA 98271 PH 360 651 8282 FAX 360 651 8080
4. ATION LETTER RS 40 FORM 15 901C PRECTEIGN Issued 4 30 02 AIRMOTIVE CORPORATION Page 2 of 3 INSTALLATION TROUBLESHOOTING CHART RS RSA FUEL INJECTION SYSTEMS PROBLEM PROBABLE CAUSE REMEDY ROUGH IDLE SLIGHT AIR LEAKS INTO REPAIR AS NECESSARY INDUCTION SYSTEM THROUGH LOOSE INTAKE PIPES OR DAMAGED O RINGS USUALLY ABLE TO ADJUST INITIAL IDLE BUT ROUGH IN 1 000 1 500 RPM RANGE LARGE AIR LEAKS INTO INDUCTION SYSTEM SUCH AS MISSING PIPE PLUGS ETC USUALLY UNABLE TO THROTTLE ENGINE DOWN BELOW 800 900 RPM FUEL VAPORIZING IN FUEL KEEP TEMPERATURES LOW BY LINES OR DISTRIBUTOR AVOID EXCESSIVE GROUND RUN ENCOUNTERED ONLY UNDER RPM S AS HIGH AS PRACTICAL HIGH AMBIENT COWL FLAPS OPEN WHEN PRACTICAL TEMPERATURE CONDITIONS UPON RESTARTING HOT ENGINE OR FOLLOWING PROLONGED OPERATE AT 1 200 1 500 RPM FOR OPERATION AT LOW IDLE SEVERAL MINUTES TO REDUCE RPM S RESIDUAL HEAT IN ENGINE COMPARTMENT LOW TAKE OFF FUEL FLOW FAULTY GAGE IN TWIN ENGINE INSTALLATION CRISS CROSS GAGES REPLACE AS NECESSARY SINGLE ENGINE CHANGE GAGE STICKY FLOW DIVIDER CLEAN FLOW DIVIDER HARD STARTING TECHNIQUE REFER TO AIRCRAFT MANUFACTURER S RECOMMENDED STARTING PROCEDURE FLOODED CLEAR ENGINE BY CRANKING WITH THROTTLE OPEN AND MIXTURE IN ICO THROTTLE VALVE OPENED OPEN THROTTLE TO POSITION TOO FAR APPROXIMATING 800 RPM INSUFFICIENT PRIME INCREASE AMOUNT OF PRIMING USUALLY ACCOMPANIED BY A BACKFIRE
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