revs too high while driving / coasting

Asked by Jul 28, 2015 at 05:06 PM about the 1995 Volvo 850 Turbo Wagon

Question type: Maintenance & Repair

1995 850 Turbo Wagon started to rev too high. Below is a list of symptoms.

1. Rough start:
a. On cold start, may not start immediately on first try
b. Idle after start is rough at first, becomes smoother after gas pedal is pressed first time
2. Idle RPM choking then recovering after pushing gas pedal at stop sign
3. RPMs not going down on coasting, e.g. when going 40 mph and releasing the gas pedal (not always); sometimes revs up and accelerates
4. RPMs going up without notice (rarely); had RPMs go from 800 to >3000 when in parked and idling
5. Guzzling more gas than usual (estimate: now under 20 miles to gallon, used to be above 21)

1 Answer

19,840

Check air filter and clean throttle body and also clean or replace (IAC) Idle Air Control valve replace fuel filter if have not done so in a while add fuel injector cleaner to gas tank and use middle grade or high test gas to help clean out the gum and carbon build up.

Your Answer

Volvo 850 Experts

  • #1
    Tom Demyan
    Reputation
    180
  • #2
    Guttermonk
    Reputation
    80
  • #3
    Mike Mettrick
    Reputation
    60
View All

Related Models For Sale

Used Volvo 940
11 listings
Used Volvo 960
18 listings
Used BMW 3 Series
1,151 Great Deals out of 32,993 listings starting at $1,000

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.