Question about 1989 Audi 100

1 Answer

Engine running very rich

I have a 1989 Audi 100 Quattro with a 2.3 5 cylinder engine. Someone replaced the engine with a 1991 2.3 5 cylinder engine. I have rewired all the sensors to work correctly and replaced the o2 sensor. the car runs fine except at idle it runs at 500 rpm for a few seconds then goes up to 1200 rpm then back again all the time. The engine is running very rich and smokes a little bit. What is the problem?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 57 Answers

I had a honda prelude that did the same exact thing and it was unbeleivably it was the altanator!!

Posted on Apr 17, 2009

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 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.
New users get to try the service completely Free afterwhich it costs $6 per call 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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Injectors are cracking the ceramic tops


These are hitachi injectors and are horribly engineered..Replace them with modern bosch injectors:
http://www.034motorsport.com/product_info.php?cPath=24&products_id=329

Jul 16, 2009 | 1991 Audi Quattro

1 Answer

1989 Audi 90 Quattro problem


Try changing the fuel filter, first. If that does not work try replacing the pump. Also make sure you run 91 or higher octane.

Apr 20, 2009 | 1989 Audi 90

1 Answer

1991 Camry running rich


check for vacuum leaks especially around the intake manifold gasket. Although the engine appears to be running rich, it could also be misfiring due to being too lean in one cylinder. When the cylinder doesn't fire the charge, it goes into the exhaust completely unburned and looks like a rich running condition due to the unburned fuel. If it is a vacuum leak causing the problem, the engine will run fine at road speeds but misfire at idle and not pass smog.

Jan 30, 2009 | 1991 Toyota Camry

1 Answer

No spark or fuel in my 1991 audi


without doing a lot of testing to pin point the problem, it's hard to tell, but have the computor checked, it's a start, good luck

Jan 22, 2009 | 1991 Audi Quattro

1 Answer

I am trying to get a workshop manual for an Audi Quatro 100 2.8 l


Check out these 2 websites, eautorepair and alldata, you register your car and pay for access to manual info for a time period u set (eautorepair 1week to 1 year, $11.99- $29.99, u can print any info off your computer). Let me know if u can't find your vehicles info.

Nov 30, 2008 | 1991 Audi Quattro

1 Answer

1991 Audi 90 Quattro 5 cylinder duel head over cam


Audi used a sealant and when i do this job I bang a scrwdriver in between the block and the oil pan and prize it off.

Sep 15, 2008 | 1991 Audi 90

2 Answers

HELP, MISFIRING: 1999 Audi A6 Quattro Avant Wagon


P1127 Long Term Fuel Trim mult.,Bank1 System too Rich

P1129 Long Term Fuel Trim mult.,Bank2 System too Rich

P1250 Fuel Level Too Low

P1300 Misfire detected Reason: Fuel level too low

P0154 02 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)

P0300 Random/Multiple Cylinder Misfire Detected

P0303 Cylinder 3 Misfire Detected

P0304 Cylinder 4 Misfire Detected

It sounds like there is a lot going on.

Good Luck

Brian

Sep 14, 2008 | 1999 Audi A6

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

Related Topics:

329 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audi Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

yadayada
yadayada

Level 3 Expert

76630 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14378 Answers

Are you an Audi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...