Question about Cars & Trucks

2 Answers

1990 BMW 525i stalling, ruff idel.

Just bought this car, 1990 BMW 525i w/ 2.5 6 cyl, & auto, 159,xxx miles. Initial start up is OK, but when you give it some gas or put it in gear idel gets ruff, wants to stall. Has a ruff idel & stalls at stop lights. Hard to get it to start up again (cranks well, but takes awhile to start up again, ruff idle). Engine bogs down, runns porly. Have to keep RPM above 2000 to keep it running. First thought is idel control valve, any other sugestions for me? Check engine light is on, possibly due to large cracks in air filter box (letting to much air into engine?).

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Passionate:

    Visited the website for 10 consecutive days.

    Habit-Forming:

    Visited the website for 3 consecutive days.

  • Expert
  • 83 Answers

Can be a lot of things causing a rough idle. The first thing I would do would be to pull the code/s and see what it's saying. That will save you a lot of money. Other possible causes are vacuum leak, valve cover gasket leak, blown head gasket, MAF (mass air flow sensor), CCV (crank case ventilation), O2 sensor(pre-cat), IAC (idle air control valve), definitely the air box crack or filter, cam shaft position sensor, seals (VANOS), coils, fuel filter.

Again, I would get the code read and replace your air box before anything else. You don't want to be wasting money just guessing, remember also that even though the code may say something is wrong your going to want to take a multimeter and confirm that something is wrong. Test everything before you change.

Posted on Apr 25, 2017

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 14,243 Answers

Your fuel injectors maybe clogged up,have them cleaned.

Posted on Apr 25, 2017

6 Suggested Answers

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

emissionwiz
  • 75117 Answers

SOURCE: car idles low, stalls after start

Common issue at the shop (i'm a ford technician), here is what I do to correct it.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Mar 11, 2009

teezay731
  • 1 Answer

SOURCE: rough idle stalls at low rpm's

check your transmission fluid,the motor will stall when fluid is low

Posted on Mar 24, 2009

  • 218 Answers

SOURCE: 2001 toyota echo engine light is on. Car idle is rough and sometimes stalls. Is there a way to clean the idle air control valve without removing it?

NO U HAVE TO REMOVE THE IAC TO CLEAN.DO U KNOW WHET CODE THE LIGHT IS SETTING?

Posted on May 05, 2009

  • 62 Answers

SOURCE: Car hesitates/stalls when engine is warm and car starts to move.

Sounds like a bad motor mount, pop the hood and see if the motor shakes or moves rapidly when u put it in gear holding down the brake.

Posted on May 10, 2009

  • 101 Answers

SOURCE: 1989 VW cabriolet, fuel odor, engine stalls in 1st and 2nd gear

Ignition system sounds probable on vhicle when everything gets warmed up. High pitched hum could be bad tire or worse bearing.

Posted on Oct 02, 2009

Testimonial: "Thank You for your response. The huming sound is present on idle from start-up,tires have just been replaced, would fuel pump be suspect?"

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...
Cars & Trucks Logo

Related Topics:

99 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...