Diagnostic Procedure 8 — Hesitation when the Engine is Cold
EF & EC-537flowchartSR20DET engine (header tab).
TROUBLE DIAGNOSES
Diagnostic Procedure 8 — Hesitation when the Engine is Cold
1
CHECK SPARK PLUGS. Remove spark plugs and check for fouling, etc.
N.G.
Repair or replace spark plug(s).
O.K.
2
CHECK FOR INTAKE AIR LEAK. When pinching blow-by hose (lowering the blow-by air supply), does the engine speed rise?
Yes
Discover air leak location and repair.
No
3
TRY A KNOWN GOOD AIR FLOW METER.
Trouble is fixed.
Replace air flow meter.
Trouble is not fixed.
4
CHECK FOR INTAKE VALVE DEPOSITS. If there are deposits on intake valves, remove them.
INSPECTION END