Question about 1995 Volvo 960

4 Answers

Replaced Idle Air Valve and EGR Valve. Car still runs rough.

Car still has hesitation and I have been told it needs a Mass Air Meter Fault P/MN-8251499. What is approx cost of this part and does it sound like it will solve the rough idle and hestation?

Posted by on

4 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 9 Answers

On my 96 960 I had to replace the intake manifold rubber fittings to achieve a smooth idle.

Posted on Dec 06, 2014

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 115 Answers

I say clean the Mass airflow sensor with mass air flow cleaner, nothing else, then allow to dry. A clogged EGR valve that has not had the pipe totally cleaned will impose poor performance from your vehicle. If your car still runs rough, I am suggesting that you have the coils checked or just replace them, it is indeed prudent to do this since coils are the number one issue most times in non-performance issues. Could be tune-up time or just the need for a air filter and or fuel filter change, this stupid items also are a number one cause of performance troubles.

Posted on Apr 02, 2011

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 8 Answers

There is an *awful lot* of stuff that can cause a car to have hesitation on acceleration.
Have a *good* mechanic read the codes from your vehicle and do the diagnosis.

You might also suspect a crappy or clogged EGR valve.

Like the other post said, you could try buying some MAF cleaner and carefully spray the element inside of the MAF sensor with it according to directions ... that's pretty easy to do. But this only works for the "hot wire" type of MAF sensor. The cold-wire or any other type this will not be possible for.

On the chance that the MAF is contributing to the problem ... here's something you might try.

MAF sensors are very very VERY sensative. Any, and I mean ANY crack or air infiltration in the duct or housing that goes from your MAF sensor to the plenum will cause your car to have problems.
(that is, the section of the air ducting that is *behind* the MAF sensor... in other words, the section of black plastic or rubber ducting that is between the MAF sensor housing and your engine.)

Disconnect the negative battery terminal.
Clean the whole outside of the housing, ducting etc with hot water and something to cut the grease a bit like dishsoap , maybe a couple squirts of carb cleaner and rinse - dry it off with a towel (make it pretty)... this means the whole outside of the rubber or plastic tube or duct between the MAF sensor and the plenum (air intake) on the engine. Then, check that every band-clamp (hose clamp) or any other fastener on that ducting is properly tight ... tighten any that are not. Now get a big roll of duct tape or electrical tape and wrap tape around any and all areas of that run of ducting that has any possibility of being loose or cracked including at any joints ... wrap it as if you were trying to stop a leak from a hose ... round-and-round.

Importantly, if any of the ducting is the hard rubber type that has a sort of "accordion" appearance, duct tape that section where those ridges are really well ... this is a notorious place for hairline cracks.

Finally, hook the battery back up and restart the car ... make sure to drive it for a good 20 or so minutes so that the engine can make any accomodations to it's electronic controls.

If this does not help and you decide to go back to spray your MAF sensor off, you will obviously have to unseal/untape at the joints necessary to access the MAF sensor. (But FIRST make sure you have the hot-wire style MAF that this will work on, eh?)

You may in fact end up taking your tape job back off if it turns out not to be the problem ... but hey it's a shot.

Posted on Dec 19, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 87 Answers

The Mass air flow sensor account for ALL Of the air entering your engine , and controls the amount of fuel the Computer dispenses , prices can range from $400+ to $100 or lower , depending on the year/make/model . You may try cleaning your MAF with cleaner from a parts store , make sure it is specifically designed for MAF's as using the wrong type of cleaner may damage the sensor .

The maf could Definately cause your rough idle/hesitation.

Posted on Dec 19, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Faulty air flow meter


If the idle air control valve is bad, you'll have trouble with rough idle, stalling, surging etc. along with the sluggishness. The Mass Air Flow sensor is more likely the cause. Not sure where you're located but at AutoZone, you can return the part if you have to.

Apr 07, 2014 | Nissan Pickup Cars & Trucks

2 Answers

Idle speed adjustment 1990 Dodge Spirit 2.5


Hi there.Alright I've no the game they play.On top of the throttle body close to where the throttle linkage is you'll see like a little cap.What your looking for here is where the throttle linkage rest when its at idle.You'll see the screw that comes out and the throttle rests on.That you'll want to turn.You probably cant see the screw head because of a cap or little cover thats over it.Try and remove that cap and if you ruin the cap taking it out thats alright it doesnt have to be put back in or you can do what they probably did.Grab a pair of pliers and grag the part thats sticking out and try treading it in a litlle.his should work for ya.thanks for your time and good luck and have a great day

Mar 31, 2009 | 1990 Dodge Spirit

1 Answer

Engen problem and missing


Sir, your question is not very clear, but I will still try to post a solution here. Engine missing could be due to any problem in fuel system, ignition system, engine or ECM as well.

LOW ENGINE IDLE SPEED (Poor idling):
-Throttle body (do the cleaning and idle speed learning)
-A /C signal circuit
-Fuel pump control circuit
-Fuel pump
-Intake system
-P C V valve (clogged or open) and hose

ROUGH IDLING:
-Cylinder Compression
-Ignition system (Igniters, spark plugs, wiring harness)
-Spark plug fouled, gap too wide or too short. (1.00-1.1 mm)
-Fuel injector circuit
-E C M power source circuit
-Fuel pump control circuit
-Fuel pump (required pressure 44 psi - 49 psi)
-Throttle body (cleaning)
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Heated oxygen s ens or
-Mass air flow meter
-Idle hunting
-Throttle body
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Mass air flow meter

HESITATION/ POOR ACCELERATION:
-Fuel pump control circuit
-Fuel pump
-Spark plug
-Ignition system
-Fuel injector circuit
-E C M power source circuit
-Mass air flow meter
-Throttle body (do cleaning)
-Intake system
-Valve timing
-Cylinder Compression


Jan 18, 2014 | 2008 Toyota Corolla

1 Answer

No Idle - dies. Truck has been sitting for six years. Had 2nd cylinder miss and rough Idle. Replaced plugs, hoses, adjusted TPS to Spec, and adjusted timming. I had to take vaccum line from Cruise...


I would check the EGR valve diaphragm to see if it will hold a vacuum. The VSV associated with the EGR valve is controlled by the computer and is probably what is kicking in at 1700 rpm. When the VSV opens, a leaky EGR diaphragm will let air into the intake manifold just ahead of the throttle body. This air will not be measured by the mass air flow meter/sensor and the resulting mixture will be very lean and lead to misfires.

Feb 25, 2011 | 1986 Toyota Pickup 4WD

1 Answer

2001 kia optima hesitates on acceleration gets better when warm, but still does it, has 2.4 engine


3 possible problems your mass are flow meter/senso could be going bad but not bad enough to register a fault, the same for your idle air valve and also your throttle position sensor. all 3 of these are on your throttle body .
with the engine running tap the side of the mass air flow with the back of a screw driver, if the engine sputers mass air flow needs replaced.you can try cleaning it with some mass air flow cleaner if you cant find that at your auto parts store get some electrical parts wash. your idle air valve needs to be cleaned or replaced there hard to get off. your throttle position sensor , you need to know the setting ,if the auto parts store cant give you aprint out of instuctions best to let a kia dealership do it and pay out the ****.

Aug 04, 2010 | 2001 Kia Optima

2 Answers

Nissan Xterra EGR valve troubleshoot


check the EGR by disconnecting it to see if there is a change in the engine at idle

Oct 03, 2009 | 2006 Nissan Xterra

1 Answer

What are the symptoms of a faulty oxygen sensor?


bad oxygen sensor will make a car run rough.also mass air flow sensor egr valve sticking open or pvc valve open.idle speed control problems.have your car scan.because there are many sensor causes it to run rough.

Apr 16, 2009 | 1999 Pontiac Grand Prix

1 Answer

Tick over problem


Sounds like it could be a bad EGR valve, the trans fault codes of p1775 is nothing really, it could even be the fact that you are putting the car in gear at 3,000 revs.
If this is an intermittant problem then it goes right back to the egr valve. They clog and stick and will cause bad/rough idle issues especially on start up and also will cause spiratic idle problems.
JPTCAT

Jan 28, 2009 | 1995 Jaguar XJ6

1 Answer

1989 Grand Marquis 5.0 hesitation under load at 25, 40, 50 mph and slightly rough idle


What happens when you unplug and cap the vacuum line at the EGR valve? Does the problem go away? Before doing this does the car idle rough? If so perhaps the EGR is stuck open...

Jun 30, 2008 | 1989 Ford Crown Victoria

Not finding what you are looking for?
1995 Volvo 960 Logo

1,136 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts

yadayada
yadayada

Level 3 Expert

63661 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Mark Jones

Level 2 Expert

76 Answers

Are you a Volvo Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...