Question about 1986 Volvo 740

1 Answer

Runs erratically If I have it in park with no foot on the gas pedal it will rev up and drop down to normal continuously. Driving down the highway it will lose power...almost like its coughing or can't get enough air?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 150 Answers

The idle air valve (located below the throttle body) provides the control for constant idle speed. In order to set the correct air valve opening to achieve constant idle speed, the fuel injection control unit uses information from the air mass meter, throttle valve switch and the ignition control unit (RPM signal) to regulate the output current to the idle air valve. This means that the idle valve is not affected by air leaks or a jammed throttle valve.

Posted on Nov 03, 2008

Ad

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 Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My question: what can cause the car to do this?


I assume the car you are talking about is your 1968 Dodge Dart GTS with a 4-speed manual transmission. The engine has a special camshaft, Chrysler P/N 312044, which has a 60 degree overlap in the valve timing, since the engine is built to rev in excess of 6,000 RPM. The problem with your car is obviously a leaky accelerator pump. Why don't you get a car that (1) does not have to run on premium gas (because of its 10.5:1 compression ratio), and (2) uses fuel injectors instead of a wild 4 barrel carburetor made for 1/4 mile drag racing? I happen to know that that is the car you are referring to, because you did NOT say that it WASN'T!

Apr 29, 2017 | Cars & Trucks

1 Answer

I have an 03 Jeep Grand Cherokee v6 2x2 with 170k... I'm having a couple of issues... 1. Occasionally will have trouble with cycling through gears when getting on Hwy causing decreased, sluggish...


I would consider changing the vehicle speed sensor. When they go bad, they can really throw out a lot of bad data to the computer, resulting in unexpected behavior like you're experiencing. They're only around $20-$25. I hope this helps! :)

May 02, 2014 | Cars & Trucks

1 Answer

CAR SHUTS OFF WHILE IM DRIVING


Shuts off, or stalls when letting off the gas pedal? WIll it run down the highway ok?

Apr 02, 2014 | 1999 Dodge Intrepid

1 Answer

Engine rev high by its self


The most common causes of this are a engine vacuum leak and a sticking idle speed control air bypass valve.

Jul 15, 2017 | Cars & Trucks

1 Answer

Vw polo maintains engine revs when foot is off the accelerator.


You need to check the cable the runs from the gas pedal to the engine, it might be rusty and need some drops of penetrating oil at the point it meets with the engine accelerator valve.

Feb 11, 2010 | 2007 Volkswagen Golf

2 Answers

1994 Buick Regal GS 3.8L stalling at idol


Try changing the map sensor it controls idle and it could affect your car like that...........

Jun 27, 2009 | 1994 Buick Park Avenue

Not finding what you are looking for?
Cars & Trucks Logo

1,300 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts

yadayada
yadayada

Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides

Loading...