The message to which you are about to reply is shown first. GO TO REPLY FORM



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

surging idle, the hunt continues 200 1992

posted by  cn52x5hg on  Sat Apr 1 14:57 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat May 11 17:37 CST 2013
[RELATED]

i have posted a few times on this issue, so i hope im not irritating anyone!

i did a bunch of additional tests today all to no avail.

summary of problem: engine idles progressively higher as it warms up...after its warm, the idle races high, and then drops down for a second...over and over again...the problem began after a TB cleaning and replacement of several badly torn or missing vacuum hoses.

what ive done:
-rechecked all electrical connections
-disconnect throttle linkage to ensure TB is closed
-removed, tested, and cleaned IAC
-tested TPS signals at ECU
-replaced intake hose. actually found a crack in old one. didnt fix it :(
-tested temp sensor at ECU
-checked for codes, none present
-cut power to ECU to clear any adaptive history

during my ECU testing, the only thing that came back amiss, was the cold start valve test registered an open circuit. bentley claims i should see about 10 ohms resistance. is it possible this could be stuck open and dumping fuel in even after it warms up?

when i was at the pnp today, i also picked up a spare fuel pressure regulator. is this worth swapping out? has a bad FPR ever been known to cause a surging idle?

short of replacing the intake manifold gasket, which id prefer to avoid, i am running out of options?

thanks!






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©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.