2003 Volvo 850 Heating / Cooling System Happens always Always
New User Asked -
I recently moved to Michigan from Southern California, where I rarely used my heater. Now I notice that the heater does not warm the car up as much as I think it should. I have a 2001 Jeep Cherokee and it puts out heat very well on a low setting. The Volvo puts out weak heat at the highest setting. I know that even if you don't use heat/air conditioning that you should "exercise" it once in a while, and while I lived in California I did run the heat 3-4 times a year for 10-15 minutes to "exercise" it. Where do you think the weakness is coming from?
A 2003 should still be under warranty and any concerns should be resolved by the Volvo dealership.
What is the problem with your heater? Is it to little airflow? Or is it a problem with the actual temperature of the heat? If it's a problem with the temperature look on the heater core inlet hose to see if it's equipped with a water control valve. This valve will have a vacuum hose or cable attached. With a fully warmed engine, check to see the temperature is equal on both sides of the valve. If not the problem is here. If the temperature is lacklust on both sides you may need a new thermostat.
BTW, did you mean a '2003 Volvo' '850'? The designations can be confusing on the informaion systems we use.
New User -
Maybe I typed in a mistake (wrong decade). My car is a 1993. The problem is not with air volume, it's temperature. If your answer about the heater is the same for a 1993 as you spelled out for a 2003, I'll check that out.
Take a look and see if your car has the water control valve. I had looked up a 96 or 97 as it was the newest 850 listed.
If the inlet hose is hot going into the heater core, it should also be hot coming out. If not suspect a restricted heater core (assuming coolant level is okay).
1994 Volvo 850 Engine Malfunction When starting Always
New User Asked -
i had a mechanic change my radiator and now when i start the car it revs up to 3000rpm for 15-20 secs and then it drops down to on how and it idles like it is on its last horse leg can you help
Make sure the coolant level is full and no air is trapped in the cooling system.
Inspect wiring near the radiator, anything that may have been damaged in the installation.
Did you call the mechanic and explain to him the problem. An honest mechanic should at least look at the car to see if he may have inadvertently caused the problem. The shadiest of mechanics would create the problem trying to make some fast money.
when i first put my car in drive it wont pull,in low gear it pulls fine.after driving for a few miles drive is fine.and if i drive it several times a day,its fine.if i dont drive itr for a few days it starts doing it again.
Bruce Kit -
First check is the fluid level and cleanliness.
Recommend doing a trans fluid flush and change filter in the trans.
It sounds like some of the rubber internal seals are drying out and getting hard. Driving the car for a short period of time warms and softens the seals and then enables tnem to do their job.
A minimun thing you might try (if a fluid flush is not done) is to add a good quality additive to the trans fluid.The chemically soften the seals and help somewhat. A particular product that I have sucess using is from a company called BG. It might not be avail in your area, and if that is the case, try using a name brand trans additive.
What would make my car accelerate when my foot is on the brake pedal and not on the gas pedal. Even sitting still in a parking spot, the engine will rev up to 400 RPM without me touching the brake pedal. It's weird that when I take my foot off the gas and apply the brake, the engine speeds up. It's like it's trying to stop and go forward at the same time. Is it dangerous?
Yes this is dangerous because the vehicle may lurch/launch forward (or backwards), while in gear, without warning.
Is the vehicle actually revving up to 4000 rpm's?
What does the engine do if you start it and allow to idle while in park? Any change if you press the brake pedal?
New User -
In Park, it will rev up to 3 or 3.5, go back down to just below 1, then go back up to 3.5 or 4, without me even touching the gas pedal. When I put it into gear, I feel a "kick" and the engine gets louder and a bit rougher, but it does not necessarily rev up. It doesn't seem to do anything in Neutral. The 3 or 4 times it has happened have been when I was pulling into the neighborhood and slowing way down, and when I was pulling into a driveway or parking space. But today, it will do it in Park if I just start it up and sit in the parking spot without moving, and I noticed it will rev up whether my foot is on the brake pedal or not. I had a tune-up done recently, so it seems it would be running more smoothly now. It seemed like it was "missing" a little before I did the tune-up, but it still feels that way. The automatic revving up did not happen when I was driving 50-55 on the highway this morning. When it's just idling normally it goes up and down a little, above and below 1 on the RPM dial. After a tune up I thought it would be smoother. I had the timing belt and a leaky fuel line replaced this week, but the "revving up" on its own problem started just before I took it in for that work. I hope this makes some sense.
It revs because air is entering somewhere. Could be a major vacuum leak- intake gasket, throttle body gasket, vacuum hose, air intake hose (check thoroughly for leaks here), etc.
It could also be the IAC (idle control valve) being commanded on. Unplug this and see if idle speed stabilizes, or drops low enough that the engine stalls (in this case raise the rpm's slightly with the accelerator to see if you can maintain a steady idle.
The egr valve could also be sticking open, this will usually cause the engine to stall but can cause the situation you mentioned.
New User -
Thanks. I have an appointment with a mechanic tomorrow morning and will ask him to check all of these. I'm hoping it won't be an expensive repair, because I've had to put a lot of $$ into the car lately. I keep hoping that I've taken care of everything, and then something else breaks. Is it worth hanging on to a 94 850, even with all the repairs, or should I be looking for another car?
Well, I'd give it one last chance.
What have you done so far?
Also, rough prices. You may want to find something that uses less expensive parts.