Main IndexAuto Repair Home Search Posts SEARCH
POSTS 		Who's Online WHO'S
ONLINE 		Log in LOG
IN




Automotive Repair
Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:   
  Login
  Sign up here!



Latest Forum Post
with_replies.gif image   Camshaft Adjuster - Car not starting
Mercedes s500 2017 - I am reaching out t...

with_replies.gif image   Door locked shut
Hello, New here and really nee...

with_replies.gif image   Hey, I'm Brandon – Questions About Keyless Ignition
Hey all, I’m Brandon! Just a car enthu...

with_replies.gif image   Can't drive out nut from steering knuckle
2005 FORD MONDEO III Stationwagen (BWY) ...

hot_with_replies.gif image   2001 Chevy Cavalier 2.2L automatic radiator fan not running
2001 Chevy Cavalier 2.2 L , radiator coo...

no_replies.gif image   SPRING TIME. TIME TO CHECK YOUR SPARE TIRE
Take your tire out, inspect the tire and...

with_replies.gif image   2011 Honda Pilot Sideview Mirror Compatibility
Hello, I just bought a 2011 Honda Pilot...

with_replies.gif image   Mitsubishi Lancer 2008 2.0 DID Fuel Pump Problem
I moved my car and after 2-3 hours I sta...

with_replies.gif image   Question about my Alternator on a Nissan
2002 Nissan Sentra 1.8L, 210,435 miles ...

with_replies.gif image   Going to school to become a mechanic. I need help understanding the vacuum modulator.
I've done my research and asked my teach...




1998 Volvo S90 revving issue

Search for (search options)
 



anash715
New User

Aug 5, 2012, 7:22 PM

Post #1 of 4 (2470 views)
1998 Volvo S90 revving issue Sign In
So yesterday morning when I was leaving for work when I started my car it just started revving up to about 3500rpm it did it a few more times and then stopped and now it starts fine but when I tap the gas pedal in park it revs to about 4000rpms on its own and drops. Could to be my TPS or maybe the MAF


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Aug 5, 2012, 7:30 PM

Post #2 of 4 (2459 views)
Re: 1998 Volvo S90 revving issue Sign In
Not sure without testing.

The idle speed is determined by the engine computer based on readings it gets from the engine coolant temperature sensor, TPS, engine speed, pressure switch signals, etc. All those things would have to monitored along with the how the PCM is controlling the idle air control motor to give you an idea what is going on and where to look for the problem.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


anash715
New User

Aug 5, 2012, 7:33 PM

Post #3 of 4 (2452 views)
Re: 1998 Volvo S90 revving issue Sign In
I'm taking it to the mechanics in the morning but right now I unplugged the battery hoping that reseting the computer could fix the problem


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 6, 2012, 3:20 AM

Post #4 of 4 (2407 views)
Re: 1998 Volvo S90 revving issue Sign In
Quote
I'm taking it to the mechanics in the morning but right now I unplugged the battery hoping that reseting the computer could fix the problem
So when you arrive at the mechanics he has to send you away because you already erased all the valuable diagnostic info from the computer. You need to decide who is fixing this car, you or them and them stick with it because you don't want to mess with it yourself and then ask a mechanic to look at it. He won't be real happy about that or able to help much.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.






 
 
 






Search for (options) Privacy Sitemap