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4.2 Engine backfires/sluggish/unstable when accelerating

pavelbarchuk on 01-09-2013

05-20-2015 11:30 AM
by allenst

9

20,370

4.2 V8 Discussion

1995, a4, a6, acceleration, audi, b5, backfire, backfires, days, hot, idle, loses, miata, power, rough, suburban

98 A6 Backfire, rough idle and acceleration problems

silversurfer98 on 06-02-2010

12-23-2014 01:54 PM
by johnkk

6

9,486

A6 / S6 (C5 Platform) Discussion

a4, audi, b5, backfire, backfires, boost, full, hits, misfire, misfires, random, s4, stg

Stg3 A6 Misses and backfires under boost on 4&1.

Li3ny on 07-15-2013

07-23-2013 05:05 PM
by bgc5034

8

1,865

S4 / RS4 (B5 Platform) Discussion

04, 2008, allroad, audi, audi27trunningrough, audi27trunsroughunder3000rpm, backfire, diagnostics, eccelerating, fsi, idle, misfire, rough, running, runs, startup, tt

Audi Allroad running rough, misfiring. Pulled VCDS Codes

zeeborg on 06-06-2013

06-10-2013 06:36 AM
by HWY HNTR

1

4,343

2.7T V6 Discussion

Engine dies when doing test for fault codes???

Gristle on 08-10-2012

08-17-2012 04:12 PM
by yodasfro

2

839

Audi 90 / 80 / Coupe quattro / Cabriolet

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1 2)

carguy200550 on 09-08-2011

01-10-2012 06:03 AM
by carguy200550

15

15,921

2.7T V6 Discussion

backfire when shifting at high rpms

green94urs4 on 11-24-2010

11-29-2010 06:23 AM
by UrS4boy

3

2,156

Audi Original "S" Cars

2010, a4, acceleration, audi, backfire, cabriolet, exaust, lowered, noise, poping, popping, s4, s5, shifts, sound

S5 Cab pop noise

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1 2)

tta4cab on 05-09-2010

05-11-2010 02:15 PM
by dseag2

10

2,298

Audi A5 / S5 / RS5 Coupe & Cabrio (B8)

18, 18t, a4, audi, backfire, boost, idle, logging, logs, maf, misfire, misfires, plugged, randommultiple, stg

'00 1.8T - No Have'm Boost

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1 2)

StaggerLee on 09-01-2009

09-24-2009 12:53 PM
by StaggerLee

11

4,740

A4 (B5 Platform) Discussion

225, a6, audi, backfire, battery, boost, disconnect, hard, hesitation, intermittent, limp, mode, soft, symptoms, tt, vagcom

Boosting issues and limp mode..

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1 2)

silverTTQC on 08-10-2009

08-14-2009 04:31 PM
by silverTTQC

10

8,078

TT (Mk1) Discussion

2200rpm, 5, a6, audi, auto, backfire, block, cylinder, darintake, engine, misfire, mod, p0305, s4, vagcom

Misfire, Backfire, Blinking CEL, VAG-COM Logs...(Please HELP!!!)

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1 2 3)

BurtonJJW on 10-21-2008

02-10-2009 03:59 PM
by BurtonJJW

25

7,414

S4 / RS4 (B5 Platform) Discussion

18t, 28, a3, a6, accelerating, audi, b8, backfire, backfires, backfiring, detected, misfire, misfires, missfire, problems, s5

Misfire / backfire problem - how are misfires detected?

spurtle on 11-03-2008

11-03-2008 10:30 AM
by spurtle

0

1,970

A6 / S6 (C5 Platform) Discussion

2001, audi, backfire, cold, gap, issues, plug, spark, start, starting, tt

Backfire and cold start issues...

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1 2)

iTTaliano on 10-22-2008

10-23-2008 11:42 AM
by CincySpeed

10

4,640

TT (Mk1) Discussion

back, backfire, backfires, backfiring, car, changed, firing, kx, motorcycle, plug, plugs, put, replaced, spark, wires

Changed my spark plugs, now getting some backfiring! :(

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1 2)

A4wheelin on 09-30-2008

10-02-2008 04:27 PM
by A4wheelin

13

2,580

Audi 4000 / Coupe GT Discussion

Think I can use lemmiwinks to reduce my backfires??

spinny201 on 09-12-2008

09-13-2008 08:12 AM
by spinny201

6

814

S4 / RS4 (B5 Platform) Discussion

audi, b7, backfire, engine, milltek, resonated, s4, s5, sounds, start, startup

Anybody have engine backfire on startup?

SullyS4 on 08-21-2008

08-22-2008 09:31 AM
by JB_ImolaS4

8

4,350

S4 (B6 & B7 Platforms) Discussion

1992, 525i, backfire, backfires, backfirign, bmw, car, engine, hesitate, hesitates, hesitation, lean, mgb, stalls, starts, warm, warmed, warms

Car starts to hesitate and back fire after warm up and applying gas

chris1 on 07-05-2008

07-06-2008 10:11 AM
by Tony Hoffman-4000Q

7

3,157

Audi 4000 / Coupe GT Discussion

02, 24v, a4, a6, audi, back, backfire, backfires, backfirfe, backfiring, cis, cise, fire, intake, power, quattro, vr6

4000 Quattro backfire through intake

bsowers206 on 02-24-2008

02-29-2008 06:07 PM
by Tony Hoffman-4000Q

3

1,662

Audi 4000 / Coupe GT Discussion

2005, a4, audi, b5, b7, backfire, backfires, backfiring, car, carb, carburetor, downshifting, exhaust, s4, vbb, vespa

Backfire Question

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1 2)

jjgs4 on 11-04-2007

11-04-2007 06:16 PM
by AWD2KS4

18

12,651

S4 / RS4 (B5 Platform) Discussion

18t, 1999, audiworld, backfire, blowby, change, leak, location, maintenance, passat, pcv, problem, vacuum, valve, vw

PCV - does this mean I need a new one?

thewatcher101 on 04-23-2007

04-23-2007 04:54 PM
by n0yxl

4

2,084

A4 (B5 Platform) Discussion

backfire, backfires, downshifting, downshiting, engine

What would cause backfire when down shifting?

polishadonis on 03-10-2007

03-10-2007 05:54 PM
by polishadonis

2

1,009

TT (Mk1) Discussion

backfire, coupe, g35, kai, s4orce, smurf

S4 - 2 G35 Coupe - 0 Just got back from a joyful drive, taught a lesson to a fellow Infiniti = )

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1 2 3)

S40RCE:Smurf on 01-02-2007

01-03-2007 01:21 PM
by vonSol::kinkS4

28

1,408

S4 / RS4 (B5 Platform) Discussion

My timing is waaaayyy off - damaged?

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1 2)

Mr. Ben on 01-21-2006

01-22-2006 03:07 PM
by tonyj

13

967

Audi 5000 / 200 / V8 Discussion

So much for getting dyno'd! Car died in the middle of nowhere at 11pm last night

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1 2)

mmart6545 on 01-21-2006

01-22-2006 02:13 PM
by acidrane-teh jeweler

17

2,481

A4 (B5 Platform) Discussion

Backfire

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1 2 3)

Aquattro on 11-25-2005

11-25-2005 08:27 PM
by jprice@CPS

24

1,825

A4 (B5 Platform) Discussion

20, audi, b5, backfire, bog, s4, sputtering, vw

Sputtering, Backfiring + CEL

LynxZ3r0 on 11-15-2005

11-15-2005 03:41 PM
by LynxZ3r0

4

929

A4 (B5 Platform) Discussion

18t, backfire, backfires, coil, packs, rich, stumbles

Backfiring gone, smooth power on tap...

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1 2)

Don@STaSIS on 07-07-2005

07-08-2005 07:57 AM
by Don@STaSIS

19

1,426

Audi Original "S" Cars

backfire

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a4nik8er on 05-12-2005

05-15-2005 06:18 PM
by Chimpzilla

57

1,829

A4 (B5 Platform) Discussion

After soaking injectors and ISV over night, car idles rock solid. backfires a bit under boost.

selfproclaimedv8buff on 02-08-2005

02-08-2005 09:46 AM
by chefbob

5

678

Audi Original "S" Cars

18, 18t, a4, audi, b5, backfire, backfires, boost, car, heavy, intake, leak, load, symptoms, tt

Backfire under boost. Help! please

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1 2)

cmore on 12-30-2004

12-31-2004 01:29 PM
by cmore

10

5,057

A4 (B5 Platform) Discussion