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Drew
Drew, Super Mazda Tech.
Category: Mazda
Satisfied Customers: 2518
Experience:  19 yrs. experience. Mazda Senior Certified Tech, with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.
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Mazda B2500: 98 mazda b2500 pick up. manual transmission. when

Customer Question

98 mazda b2500 pick up. manual transmission. when shifting gears engine rpm is slow in coming down. if stopped and in neutral engine rpm drops quicker after you step on the throttle
Submitted: 2 years ago.
Category: Mazda
Expert:  Drew replied 2 years ago.

Welcome to Just Answer. My name is XXXXX XXXXX X will be glad to assist you.

 

Here is a couple TSB's that relate to your concern. You will need to start with these procedures first.

 

Please let me know if you have any additional questions by hitting the reply button.

 

Thanks
Drew

 

PCM - Delayed Idle Return/MIL ON/DTC P0320 Set
Bulletin No.: 002/99
Issued: 02/16/99
Revised

 

Applicable Model/s
1998-99 B-Series

 

Subject
DELAYED RETURN TO IDLE AND/OR MIL "ON"
DTC P0320

 

APPLICABLE MODEL(S)/VINS

All 1998-99 B-2500 with manual transmission (3.73 axle ratio only).

DESCRIPTION

Some vehicles may exhibit a delay at 1300-2000 engine rpms before returning to normal idle. The condition occurs on closed throttle deceleration in neutral or with the clutch depressed. There may also be illumination of the Malfunction Indicator Lamp (MIL) and Diagnostic Trouble Code (DTC) P0320 may be stored in memory. These conditions may be caused by the Powertrain Control Module (PCM).

Customers having this concern should have their vehicle repaired using the following procedure.

Note
^This modification will only correct this specific condition.

 

Warning
^This modification is authorized only for the listed engine(s). Performing this modification on other engine calibrations is unauthorized and could create liability under applicable federal or local laws.

 

REPAIR PROCEDURE

Note
^This modification should only be performed if all other components related to idle control have been verified to be working properly. (See diagnostic index in section 01 of Workshop Manual)

 

1.Verify customer complaint.

 

 

 

2.Select the appropriate card (SST part number 49G0-88-016) and reprogram the PCM using one of the following calibrations. Refer to the "In-Car Flash Procedure" in this bulletin.

 

^9B1M-AB (Federal)
^9B1M-BA (California)

 

Note

^PCM replacement is not authorized by this Service Bulletin. Refer to section (01) of the Workshop Manual for diagnostic procedures if PCM hardware concerns exist.

 

3.Verify repair.

 

 

Bulletin No.: 011/00R
Issued: 06/23/00
Revised: 07/28/00

 

Section
01

 

Applicable Model/s
1998-2000 B-2500

 

Subject
HIGH IDLE - MANUAL TRANSMISSION

 

BULLETIN NOTE
^This bulletin supersedes 01-011/00. The REPAIR PROCEDURE section has been revised.

 

APPLICABLE MODEL(S)VINS
All 1998-2000 B-2500 with manual transmission.

 

DESCRIPTION

 

 

Some vehicles may exhibit a high idle. This may be caused by a poor electrical connection at the wire harness to the Throttle Position Sensor (TPS). A service kit is available to resolve this concern. Customers having this concern should have their vehicle repaired using the following procedure.

REPAIR PROCEDURE

1.Verify customer concern.

 

2.Install service kit per the instructions.

 

3.Verify repair.

 

 

 

PART(S) INFORMATION

 

Note:
^This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.

 

 

 

THROTTLE POSITION SENSOR (TPS) CONNECTOR INSTALLATION INSTRUCTIONS.

1.Unhook TPS connector.

 

2.Cut TPS connector off at connector and remove plastic sheathing.

 

3.Install sheathing on new TPS connector pigtail.

 

4.Locate the brown/white wire at location A.

 

^Cut and splice in a butt connector (provided in kit) approximately 45 mm from the TPS connector.

 

^Crimp butt splice connector and shrink tubing with heat gun of an acceptable heat source.

 

5.Locate the gray/white wire at location B.

 

^Cut and splice in a butt connector (provided in kit) approximately 85 mm from the TPS connector using the above procedure.

 

6.Locate the gray/red wire at location C.

 

^Cut and splice in a butt connector (provided in kit) approximately 125 mm from the TPS connector using the above procedure.

 

7.Reinstall plastic sheating.

 

8.Tape over all wiring and sheathing with electrical tape or equivalent.

 

9.Install TPS connector to TPS sensor.
Drew, Super Mazda Tech.
Category: Mazda
Satisfied Customers: 2518
Experience: 19 yrs. experience. Mazda Senior Certified Tech, with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.
Drew and 5 other Mazda Specialists are ready to help you
Customer: replied 2 years ago.
will replacing the tps wiring end will solve the problem?
Expert:  Drew replied 2 years ago.

According to Mazda, replacing the TSP wiring and reprogramming the computer should resolve your concern. If there is ever a TSB related to a concern, you always have to preform the TSB before any other repairs.

 

If the concern is still present after the repairs, then we will have to dig deeper into some diagnosis.

 

 

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