Question about 2001 Audi A4

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My 2004 Audi A4 1.8T just started running rough. At idle it cutting out and wont go over 20mph. Had the timing belt replaced 20,000 miles ago. Any ideas?

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Check for catalitic converter restriction causing exhaust back pressure on engine

Posted on Oct 02, 2009

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Check the catylitic convertor, it may be rstricted disconect the exhaust down pipe from manifold and strat engine, if the problem goes, replace the unit.

Posted on Oct 02, 2009

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1 Answer

1999 GMC Sierra 4.8l running rough now wont start


Recommend starting simple. If you suspect fuel pressure, it might be easier to start with replacing the fuel filter first, and checking fuel pressure at the filter while your there. It will give you a better chance to determine if the problem is at the pump or closer to the intake. If for some reason you have to replace the fuel pump...very common in this model truck because fuel gauge problems, the easiest way to access the pump is to unbolt the truck bed, block it up wood (Significantly easier than dropping the tank. I tilted mine to the passenger side), then you will have easy access to the pump. CAUTION!!! The connectors on the pump are brittle and break easily, especially in a vehicle this old. It's very difficult to get replacements, so take your time to prevent breaking fuel connections.

Dec 11, 2013 | 1999 GMC Suburban

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Squeeling noise, very rough idle (sometimes stalling), no engine code


Rough idle / stall at idle Check for vacume leaks & split intake tube or loose clamps on intake. Noise put spot of grease on drive belts if noise goes you may need new belts or a tighten up.

Jun 16, 2012 | 2004 Ford Freestar

1 Answer

5.4 triton. starts up rough 3 out of 5 times. did


I would check the fuel filter. They should be replaced every 20,000 miles. Also check the air filter. You could also do a fuel pressure check.

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2 Answers

I just had the 60,000 service on my 2004 volvo S60 the timing belt was adjusted but not replaced is this the right thing to do


Yes it is ok till there is no problem with the belt...You can carry on for another 20,000 miles and then replace it..

Feb 10, 2010 | 2004 Volvo S60

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Having DTC 0300 intermittant error code with rough idle and stumbling acceration on 2002 corvette with 20,000 miles just started, worse at idle and acceleration


iwould say try some octane booster sounds like poor quality fuel p0300 is a multiple misfire so start with that and i believe vettes are supposed to run 89 or better octane

Aug 05, 2009 | Chevrolet Corvette Cars & Trucks

1 Answer

1999 passat, sat for 2 yrs. Replaced battery and drove approx 20 miles no prob. Now car wont idle, runs super rough, must hold gas a little to keep running. Car wont go more than 20mph seems like it is...


power stage for ignition system is bad and the throttle needs adapted there is nothing wrong with the transmission the power stage is what fires the coils it usually stops firing cyl#2

Aug 03, 2009 | 1999 Volkswagen Passat

1 Answer

I have 2002 audit quattro TT with 180k miles. When I do a normal acceleration the car surges and rpm drop but pick back up. If I accel hard it runs fine. Also at idle at times it varies 200 rpm like a


this sounds similar to a problem i had. as the rpm went over 2000 the engine would stop for a split second and then kick back in.
after a few days looking my garage finally found the problem was a faulty air mass meter.
this cost me £200 in total to be repaired.

May 06, 2009 | 2002 Audi TT

1 Answer

Rough running not all the time


recycle it,do you need a 6 lt engine pollouting the planet

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