Question about 1987 Audi 5000 CS

1 Answer

1986 5000 TQ running issue

I have an 86 5000 CS TQ that has a bad hestitation under load. This does not occur when the engine is cold and I drive about 1-2 miles before the engine warms and it starts to hesitate. smooths out a little at higher operating temps and occassionally will run great while driving for a while. Have replaced plugs, O2 sensor and cap and rotor. no help there. No one seems to be able to diagnose the problem, but it has not gotten better with anything i've done. Any suggestions or advice before I just sell it?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 7 Answers

Try cleaning the rubber hoses associated with the idle speed stabilisation valve. If that doesn't help, try disconnecting the wiring plug from the same unit, if there is some improvement then replace the unit. You could also try checking the fuel warm up and cold start valves, these should give specific electrical readings on a meter at set temperatures, (I should be able to produce the relevant values and test procedures if you need them- let me know). It's possible that the injectors aren't opening at the correct pressure or that their spray pattern is poor. A fuel injection workshop should be able to service them for you. You could try running some injector cleaner through the system-you simply add it to the gas tank when you fill up.
Good luck, Bob.

Posted on Dec 28, 2008


1 Suggested Answer

  • 2 Answers

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

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.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Hestitation and bucking about 35 to 5 mph

is car an auto or manual trans.?
if auto, have an experienced person see if that is trany or engine relate
if its not the A/T tranny issues. then its the engine or brakes.
rear brakes can freeze with ice and drag, is it cold there?
engine only boggy , 35 to50 mph, my guess.?
do a tunup, use the 60k tune up list in the operators guide.
spark parts,(plugs,wires, cap,rotor) air filter, fuel filter.
see the list, this is not all parts.

ok, , it bucks, hot, and cold eingine, or both.
hiot idle near 800 RPM,? and if A/T can shift to drive and idle holds RPM?

Dec 06, 2013 | 1993 Geo Prizm

1 Answer

86 el camino stalls under load

As mentioned above, engine could be starving for fuel; but
also consider ignition system - as engine makes more power, maximum cylinder pressures increase. A higher spark voltage is then needed to ignite mixture (at a few degrees before top dead center... top of piston travel).
If coil is weak, plugs fouled, or plug gap too wide, adequate spark may not occur. This may cause missing,
loss of power, sometimes backfiring (backfiring may occur if timing is off, or intake valve leaky, also). If you replace the fuel filter, 'kit' the carb, but problem remains,
look to ignition system.

Diagnostic process - put a fuel pressure gauge in line, where fuel line enters carb. Rig so can see gauge, while driving. Have a passenger watch fuel pressure as you drive; especially while accelerating. If fuel pressure drops during acceleration, then its either fuel pump or filter. If pressure remains stable, consider carb issue.
If possible, test with exhaust gas analyzer, while engine
under load (possibly at an emissions test place). If lean under acceleration, its a carb problem. If not, look at
ignition system (emission test diagnostics should help here, also). Oh, and one thing I did once.... forgot to release parking brake..... duh.

Best of luck !

Dec 28, 2012 | 1986 Chevrolet El Camino

1 Answer

2007 Mazda CX-9 has recently developed a front end vibration under heavy acceleration. Vibration disappears if shift to neutral at highway speed, engine rev's smoothly in neutral. Suspect engine...

Try to rev the engine while at neutral if you get the same vibration to pinpoint if its from the engine or the drive shafts. If the issue occurs at a certain rev it may likely be the variable valve unit. Check if possible if you can get errors from the computer.

Sep 08, 2011 | 2007 Mazda CX-9

1 Answer

I have a 1988 Audi 5000 CS TQ with 173000 miles. Last month the car started to have 2 misses at cold start (cant remember for hot starts) that you could actually HEAR go away after the first 30 seconds of...

Did you notice if there was oil on the spark plug wires after you pulled the wires? If so you may need to replace the valve cover gaskets. They keep oil from going on the spark plug wires which in turn can cause the mis fire.

Dec 05, 2010 | 1988 Audi 5000 CS

1 Answer

Startup hestitation, check engine light 2006 Ion3

Since your "check engine" light is on you can get a free scan at Autozone or Oreillys. They can sell you a part and may have a diagram about where it fits. Just speculating it may be a coolant temperature sensor.

It sounds like you are not getting into the Cold Start mode.

May 07, 2010 | 2006 Saturn ION

1 Answer


has the electronic engine control system been tested for trouble codes? here is how you do this test, if you have a code post it back here on this thread and I will diagnose it for you. Go to the link below to see how to run a troube code test, very easy.

Oct 14, 2009 | 1995 Chevrolet Lumina

2 Answers

1988 f-150 engine knock under load

If I remember correctly, that vehicle may have had a knock sensor, depending on which engine. A quick drive to parts store and ask if they have one, will help you identify & confirm whether your particular engine has one. Another thing I remember is that the 5.0L with O.D. were very often carboning up inside the engine causing "Ping/Rattle" under load & even caused the transmission to shift in & out of overdrive hard & more often at those times. Had older fellow driving it and it very rarely went over 50mph, so it happened quite a bit. Would always find at least 1 or 2 plugs carboned up pretty bad, maybe the odd bad plug wire, and when replaced, pinging & hard, erratic shifting would disappear & run smooth. Just too low of RPM's when at normal driving speeds of 50 mph to clean out the carbon. Anyway, if trouble codes don't indicate knock sensor problem, or other, then I would pull the plugs & take a good look at them for carbon. If they're carbon covered, 1 or 2 or more, I'd be tempted to spray some combustion chamber cleaner into the throttle body as directed on can, and clean it out good, with old plugs still in, then replace plugs with new & see what you get.

Dec 13, 2008 | 2007 Ford F-150 Harley Davidson

1 Answer

'86 honda civic Si fuel issue (sputtering)

Replace the coil pack inside you distributor I believe it will solve a number of headaches for you.


Oct 22, 2008 | 1986 Honda Civic

1 Answer

1992 civic hatch acceleration problem

it might just be your timing i had the same problem with my 94 hatch did have any power on first or second just had a friend adjust the timing and werks just fine.

Oct 02, 2008 | 1993 Honda Civic 4 Door

1 Answer

86 Dodge W150 5.9L problems

i would say check your timing or timing chain(with 100,000 miles it might need to be replaced)and readjust your new carb

Jul 22, 2008 | 1986 Dodge W150

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

139 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audi Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers


Level 3 Expert

77499 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14398 Answers

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

Answer questions

Manuals & User Guides