[s-cars] Fuel Injectors ultra-sonically Cleaned

[Devon]

Nathan,
You have too much free time on your hands.  Very industrious of you "das
motor" head.
 
Devon T. James
RE/MAX MUTUAL Realty
Senior Broker Associate
Voice & Fax: 206-515-1771
www.1remax.com
 
  _____  

From: Nathan Belo [mailto:nathan at license2sell.com] 
Sent: Sunday, April 13, 2008 3:30 PM
To: northwest Audi Enthusiasts
Cc: s-car-list at audifans.com; Eric Marr
Subject: Fuel Injectors ultra-sonically Cleaned
 
I had a misfire due to a bad #3 coil, so I bought the coil ($149.85) from
Scott Mockry after using his advice to diagnose said misfire
http://www.sjmautotechnik.com/trouble_shooting/S4_Ignition.htm  .  This is
the 4th time I've had a misfire since 89K miles when I bought the car in
2000.  First 2 times was a bad Power Output Stage (POS/ignition control
module), last 2 times #4 coil & now #3 coil.  I had 204,500 miles so I put
in 5 new Bosch F5DPOR plugs ($13.75 ea.) in while I was at it.  To install
the new coil we (my high school buddy, Curtis of CMarr Automotive helped me)
cut the wire under the coil cover & soldered the wire & shrink-wrapped it
using a mini-butane torch (creme brulee anyone?).  Since the OEM coil lasted
204,500 miles I'd rather stay with the OEM set-up rather than mess with
cheaper $35/piece coils from a 1.8T & have to run without the coil cover &
not know how long the coils will last?

I also got the notice in the mail that my license plate was expiring in May
& that I needed an emission test so I figured why not get the fuel injectors
with 204,722 miles ultra-sonically cleaned.  Eliot Lim recommended the BG
vacuum system carbon clean service ($279)
http://www.bgprod.com/products/fuelair.html at the local dealer, University
Audi, but I declined since it left the injectors on the car, which meant the
old deteriorating seals & o-rings would be still be deteriorating on the car
(see pictures).  So I began my investigation on where to get my injectors
cleaned.  I located 2 local firms:  http://www.docinjector.com/
http://www.witchhunter.com/index.php4   I went with Doctor Injector in
Renton on advice of CMarr Automotive (710 S. Jackson, Seattle, WA
206-405-4402) that used them & was charged $23 ea. (supposedly wholesale
price, told him I was from the Audi Club & a referral from CMarr).  I picked
Dr. Injector because I could have my plugs back the same day & watch the
process.  Witchhunter wanted $18 for the service ($5 cheaper) but would need
the plugs for 2-3 days & I couldn't watch the process.  Some firms just swap
out the plugs with already cleaned ones they have on stock.

The manager, Art Pipkin, of Dr. Injector Renton was very friendly and a
go-kart racer labeled each injector because I gave him the order they came
out of the engine.  When I pulled out #5 injector the pintle cap broke off
fortunately it didn't fall in the chamber (see picture).  There are 4 holes
under the pintle caps and during the spray test I could see that some were
clogged with only 2 holes functioning (Hmmm, I wonder what that does for my
gas mileage & hp with expensive cost of gas?).  Art said Techron & other
cleaners only maintain an already clean injector & the only way to remove
the hard deposits is via ultra-sonic cleaning. Here's the slide show:
http://s242.photobucket.com/albums/ff107/belikeh20/Fuel%20Injectors/

Test A Injector Test before cleaning: (40 PSI pressure setting)
Injector#   OHMS  Voltage-Drop Flow-Rate
  1               15.8            7.94            65ml
  2                 "                7.89            66ml
  3                 "                7.90             "
  4               15.9            7.93             "
  5               15.8            7.90             "

Test B Injector Test After cleaning: (Comments: Cleaned & Flow matched)
Injector #                                       Flow-Rate
Flow-Rate-Increase
  1                                                      72ml
10.8% 
  2                                                      72ml
9.1%                         
  3                                                      73ml
10.6%
  4                                                      72ml
9.1%
  5                                                      72ml
9.1%   

Car runs really smooth now.  While testing I got a speeding ticket 57 in a
40mph on HWY 99 North just after the Aurora Bridge.  Passed emissions & paid
my $54 for license renewal ($3 filing fee, $13 RTA Tax, $38 Gross Weight Fee
for commercial/truck plates).  Some may ask why not go RS2 turbo &
injectors...well I have a '05 Ducati M1000s for speed & it gets 45mpg & is
more fun on the track.

Nathan Belo
Seattle, WA
'92 Pearl/Ecru //S4 IAIII+, CGR 6-spd, 2B BR brakes, 17x8 Ronal R38, RED
Samco hoses, 710n BPV