RE: Spark plugs and gaps

["Lewis, Gary M" <Gary.Lewis@West.Boeing.com>]

The 1990 tqa was missing/stumbling  _badly_ at 1.8 bar.  I replaced the
plugs (regular Bosch singles) the P/O put in, cap, rotor, and wires. No more
problems...

BTW, air temp was around 45 this morning here.  I hit second gear so hard
the ashtray flew open.  Turbo's and cold air go well together...


Gary M. Lewis
1990 200tqa Silver/Platinum 146km 1.8 bar P6000 SVR, Bilsteins, BPV
1986 5kcstqa Sapphire/Platinum 180km Stock

Randy said:
 
> Stephane wrote:
> I have had the car (86 5KTQ) for about a year and a half, it is
> totally stock and I have put on about 20,000 km since purchased
> (odometer reads 249000 km).  Dist cap, rotor, plug wires are all new.
> Hunted down and killed a couple of vac leaks.  I have looked at each
> plug and they are a nice even tan color and electrodes visually appear
> in good shape, but I did not measure the plug gap (at the time I thought
> it would be too much of a PITA).  I can hit 1.4 bar but there is a mild
> missing under heavy load (read as WOT!!) which goes away at higher 
> rpm......
> 
> I have a friend who bought an '89 200Q a few years ago that although 
> chipped, it exhibited a similar "mild miss" on WOT as well.  Neither one
> of 
> us up to speed on the Q-list at the time, and we could never chase down
> the 
> miss in the 2 years he had the car.  In his case it was more pronounced, 
> and most noticeable under pedal to the metal loads.  Lee was pretty good
> as 
> a mech, with 20+ years experience in the airline industry, but no luck on 
> tracking that particular problem down.  I have never had the same problem 
> with either of my Type 44 TQ's, the '90 200Q 1.8bar, and the '88 5kCSTQ, 
> but always wondered what was going on.  The dealer took a shot at 
> diagnosing the problem (about a $300 swipe) with no luck either.  I
> suspect 
> that the spark plugs are not a relevant cure, but worth doing for peace of
> 
> mind.  If you are interested I can put you in touch with him to trade 
> anecdotal info, or maybe this will prompt someone else's recollection of 
> frequency valve problems, fuel distributor, or general widget malfunctions
> 
> that might be the real problem(s).  In any case your problem sounds too 
> close to his to ignore.
> 
> -Randy
> '90 200TQ 1.8 bar, Euro's , 2pc EM, and a much better Audi education now!
> 
> 
> 
>