Maxima Wagon V6-2960cc 3.0L SOHC MFI (VG30E) (1986)
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Valve: All Technical Service Bulletins
Engine - Off-Idle Hesitation or Backfire Diagnosis
Reference:
TS89-005
Classification:
EC89-001
Date:
February 6, 1989
VG30E/VG30ET HESITATION, BACKFIRE
APPLIED VEHICLE(S):
1984-87 300ZX (Z31)
1985-87 Maxima (U11)
1987 200SX (S12) (VG30E)
SERVICE INFORMATION
An off-idle hesitation or backfire may be caused by intake valve deposits on some of the Applied Models listed above. The intake valve deposits are
caused by a combination of fuel quality and driving conditions.
The diagnostic procedure outlined below determines whether or not incident symptoms are the result of intake valve deposits.
SERVICE PROCEDURE
It is important for the Service Writer to obtain the following information (questions 1-5) from the customer so the proper diagnostic method can be used:
1.
Was the hesitation experienced during the first few thousand miles?
2.
Did the hesitation increase with mileage?
3.
Is the hesitation affected by weather (eg. rain, fog, high humidity, etc.)?
4.
Does the hesitation always occur? (Is this incident intermittent?)
5.
Is the hesitation worse during acceleration from a stop or is it worse when accelerating while cruising?
