Welcome to the world's #1 Volvo forum!

Volvo Fixes & Advice since 2001.

Login Register

High Idle when car has been running for a while Topic is solved

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Post Reply
lcc014
Posts: 163
Joined: Mon Jul 05, 2010 5:41 pm
Year and Model: 855, 1995
Location: Boston
Been thanked: 2 times

Re: High Idle when car has been running for a while

Post by lcc014 »

I lubed the cable with 3-in-one oil, more than 3 drops, about 7 drops and hung the cable to the hood for about 30 minutes. Then I stepped on gas pedal a few times to exercise the cable moving in and out. Reconnected it back to throttle pulley and test drove this afternoon. I drove for about 24 miles,12 miles one way. Outside temperature was not that hot, about 70 degree F in Boston. Initially, when I stopped at traffic light, I saw the idle dropped below 850 and back went back up to 850 rpm. After about 11 miles of highway driving, and parked the car, idle was at about 850 rpm. On my way back home (another 12 miles), I stuck at highway traffic jam. Idle speed stayed at 850 rpm. When I got home and parked my car on driveway, idle speed was a little bit above 850. I looked that the throttle valve spring and stopper, no gap.

So the lube of cable seems to work. I need to test drive again in hot day, 80s or 90s to really see the lube fix the high idle issue or not.

Thanks,

Ching-Ho Cheng

scot850
Posts: 6638
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 22 times
Been thanked: 317 times

Post by scot850 »

Here's hoping!

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

User avatar
abscate
MVS Moderator
Posts: 24542
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99: V70s S70s,05 V70
Location: NYC, ALBANY NY
Has thanked: 482 times
Been thanked: 1418 times

Post by abscate »

I like the way Ching-Ho works a problem until it is absolutely dead, shot, buried, dug up, and buried again.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

lcc014
Posts: 163
Joined: Mon Jul 05, 2010 5:41 pm
Year and Model: 855, 1995
Location: Boston
Been thanked: 2 times

Post by lcc014 »

:) If the lube doesn't work at hot summer day then new cable will be next (it is on it's way to Volvo dealer).

Thanks,

Ching-Ho Cheng

lcc014
Posts: 163
Joined: Mon Jul 05, 2010 5:41 pm
Year and Model: 855, 1995
Location: Boston
Been thanked: 2 times

Post by lcc014 »

I checked on the throttle cable early this morning and found that it just broke off by itself.

IMG_20200718_162400242.jpg

Fortunately, the new throttle cable was in on Thursday. I followed the instruction in YouTube to try to replace the cable. Everything went well except the clips on the cable attached to the firewall. I didn't want to cut the foam under the dash so I tried to pull it out but no luck. The rubber boot after the kickdown switch connector came off.


IMG_20200718_162432021.jpg

Then I used an 1 inch flat blade screwdriver and inserted it between the firewall and the rubber base of the cable then turned/twisted, not pried and pulling the cable at the same time. After a couple twists/turns, one side of the cable came out. Then I pulled the cable with the screwdriver twisted in the other side. Cable came out with the withe plastic clips inside the firewall hole. I was lucky that the total time was about 15 minutes.

IMG_20200718_162425707.jpg

New and old cables:

IMG_20200718_162532312.jpg

Before installing the new cable, I made sure that the adjustment end length of the new cable matched with the old cable. I also applied some grease on the kickdown switch connector to make it easy to go in and out. I test drove the car, outside temperature was about 86 degree but humid. Idle speed at 850 rpm all the times (in front of traffic light, parking in the driveway, etc). Hopefully, this fixes the idling issue. Thank you everyone for suggestions/comments.

IMG_20200718_163800912.jpg

Thanks,

Ching-Ho Cheng

Post Reply
  • Similar Topics
    Replies
    Views
    Last post