Volvo RWD 900 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 4/2014 900 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

945T idle / acceleration hesitations 900 1993

posted by  olyh01 on  Wed Jun 22 02:41 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Jul 12 09:22 CST 2013
[RELATED]

After the engine warms to normal temperature, while in D and idling, the engine frequently bogs down to around 400 RPM and recovers for a few seceonds then repeats. Put in Neutral then the problem is almost completely gone. Right after such bogging acceleration is very sluggish as if it's missing a cylinder or two. Normal driving at low or high speed seems normal. Highway gas mileages is around 23 MPG.

I used Sea Foam Deep Creep without any improvement. Then I used FI TB cleaner. I removed TB and IAC and thoroughly cleaned them. TB has light buildup but the IAC was fairly clean. The IAC rotating valve turns smoothly. After cleaning with FI TB cleaner there is some slight improvement. I did notice the idle set screw is completely turned in. Diagnostic code is 1-1-1. Idle speed in Neutral is around 700 RPM.

Q1. Any suggestions as to what to check / suspect next?
Q2. Also, is it possible to test IAC operation? If so how do I do that?

Much TIA,
Lih-Yen






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New 945T idle / acceleration hesitations [900][1993]
posted by  olyh01  on Wed Jun 22 02:41 CST 2005 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.