Nissan Skyline R34 workshop service manual page 41

text version of content this owner's manual page from owners manual to the vehicle Nissan Skyline, year of production 1998 - 2002:

TROUBLE DIAGNOSES Symptom Matrix Chart (Cont'd) Engine mechanical-related malfunction I Symptom characteristics and inspection hints Air sucked in at oil filler cap Airffuel ratio becomes lean. Aidfuel ratio compensation factor becomes higher. a Intake manifold induction vacuum becomes lower. Misconnection of canister piping Use an induction vacuum (pressure) gauge for check. ' Common to all air sucking conditions from air intake system. I Cracked intake manifold I - PCV valve stuck open Abnormal noise (peep) may be heard. Clogged fuel strainer Symptoms vary with the condition how they are clogged. However, the Air/fuel . symptoms tend to occur when the vehicle is driving at high speed and mixture Clogged air cleaner element under high load. I Malfunctioning pressure regulator I Various symptoms occur depending on the fuel pressure. Improper gasoline properties Various symptoms occur depending on the properties. IEGRiale stuck open I Deposits on valve Air/fuel ratio becomes lean. Airfluel ratio compensation factor becomes r higher. I Excessive canister purge volume Engine may stall when the accelerator pedal is lightly pressed. (Especially in summertime.) I Misconnection of high-tension wire Check if the ignition timing is correct. 1 Improperly adjusted ignition timing 1 Malfunctioning spark plug 1 High-tension wire leaks Symptoms vary with the degree of leaks. Distributor cap leaks Corn- I Improper valve contact I Symptoms vary with the degree of contact and the number of cylinders. ' pression I pressure Worn piston ring Symptoms vary with the degree of wear and the number of cylinders. Clogged catalytic converter or exhaust sys- I l tem , In many cases, engine stalls and then restarts after a while. I ' Low base idle speed Engine may stall while the vehicle is decelerating or when the power steering load or electrical load is applied. I Dragging brake Others Belt tension too high Air conditioner load too heavy I Too much refrigerant in the system. 1 j ArJ load too heavy Insufficient A/T fluid (FR model) Foreign material (vinyl, etc.) in fuel tank Symptom tends to occur when fuel level in the tank becomes lower. I Clogged radiator or capacitor I

owners manual Nissan Skyline

owners manual Nissan Skyline - year of production: 1998, 1999, 2000, 2001, 2002 - Nissan Skyline R34 workshop service manual EN