VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: catlin_cava on June 26, 2011, 05:09:13 pm

Title: TDI stumbles and miss fires
Post by: catlin_cava on June 26, 2011, 05:09:13 pm
its an ALH with bosch .216s and a Malone Stage 2 tune, 229K

The Issue, the car gets a boggy feeling, No power below 2000 then it will bog out and ill get a ton of black smoke come out and she'll start stumbling and miss firing. then it will stall out. its done it a few times to me.

Sometimes at an idle the car will idle very rought, and other times Idles great.

today it did it when I restarted it it was missing hard, and would barely idle. I had white smoke with Puffs of Black smoke.

Its not the Actualator I justed replaced it. My father in law thinks its the pump going(hes a diesel mechanic) He thinks its something to do with the advance in the pump.

and Ive had a few people tell me its the flywheel going. Whats going on so I can fix the damn thing lol.

and video you can hear it missing
(http://i734.photobucket.com/albums/ww344/calin_cava/th_09fc3690.jpg) (http://s734.photobucket.com/albums/ww344/calin_cava/?action=view&current=09fc3690.mp4)
Title: Re: TDI stumbles and miss fires
Post by: 8v-of-fury on June 26, 2011, 09:52:20 pm
I didn't hear any miss at all. When my tdi was still in the 98 body and i was driving it, the car would buck and roll the white smoke on take off or just lightly revving it.. yet it runs fine on the dolley in my garage right now..

However mine was an AHU, this is definitely fuel related. I dont know if the pump can be fully blamed, as it should continuously happen if something is mechanically wrong inside the pump you'd think.
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 26, 2011, 10:10:42 pm
http://s734.photobucket.com/albums/ww344/calin_cava/?action=view&current=68dc41f3.mp4 (http://s734.photobucket.com/albums/ww344/calin_cava/?action=view&current=68dc41f3.mp4)

you can hear it missing in that video
Title: Re: TDI stumbles and miss fires
Post by: theman53 on June 26, 2011, 10:15:44 pm
I am no expert on the TDI by any means but mom's needed a flywheel and it sounded somewhat similar.
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 26, 2011, 10:18:14 pm
I am no expert on the TDI by any means but mom's needed a flywheel and it sounded somewhat similar.

I could be but the car stalls and stumbles
Title: Re: TDI stumbles and miss fires
Post by: 8v-of-fury on June 26, 2011, 10:32:11 pm
True. I witnessed that in person, Catlin almost hit a BUS!.. lol

Man I dunno its messed, fuel restriction? There isn't any tests i can think of to test anything either..
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 26, 2011, 10:51:57 pm
True. I witnessed that in person, Catlin almost hit a BUS!.. lol

Man I dunno its messed, fuel restriction? There isn't any tests i can think of to test anything either..

Tomorrow me and Mani G are going to try and break it  ;D to see what the F its doing because shuttign it off kills the problem and erases the codes if there is any. I need the issue to happen to get the code while its running.

and yes that bus was scary no power steering going 50
Title: Re: TDI stumbles and miss fires
Post by: Quantum TD on June 26, 2011, 11:47:00 pm
Impulse sender? They do go bad at higher mileage. If the sensor is not picking up the signal, it would cause a misfire. There really aren't many sensors on the TDI motor: coolant, impulse and vehicle speed. That's about it (and the 3rd injector).

I'd start at the impulse sender, and then go from there.
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 27, 2011, 12:06:25 am
New Injectors, 3K on them lol, and they where built by Giles.
Title: Re: TDI stumbles and miss fires
Post by: rallydiesel on June 27, 2011, 12:22:02 pm
I would second checking the flywheel. In the videos, it sounds like the engine itself is running fine. It's like there's something in the background that is rattling irregularly. If the flywheel is flopping around out of balance, it will affect the way the engine runs. Dual mass flywheels suck. I replaced mine before it even went bad and the clutch feel improved dramatically.

Or you could have a collapsed lifter.
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 27, 2011, 03:29:05 pm
I would second checking the flywheel. In the videos, it sounds like the engine itself is running fine. It's like there's something in the background that is rattling irregularly. If the flywheel is flopping around out of balance, it will affect the way the engine runs. Dual mass flywheels suck. I replaced mine before it even went bad and the clutch feel improved dramatically.

Or you could have a collapsed lifter.

Just hooked the vag com and when ever thr irregular sound happens the timing is all over the place, and the IQ Jumps like crazy on the irregular sound also
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 27, 2011, 03:49:48 pm
are there any airbubbles in the feed line to the pump when its misfiring?
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 27, 2011, 04:22:14 pm
Nope, fuel line is clear filter was replaced prior to me getting the car
Title: Re: TDI stumbles and miss fires
Post by: CRSMP5 on June 27, 2011, 05:38:19 pm
pull the out line nut.. is there any metal pieces in it?? if so pump going..
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 27, 2011, 06:23:02 pm
check coolant temp in engine with vag-com when misfiring is occuring. possibly a bad CTS?
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 27, 2011, 06:40:55 pm
check coolant temp in engine with vag-com when misfiring is occuring. possibly a bad CTS?

Would it cause the timing?
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 27, 2011, 06:53:35 pm
Very much so. timing is based on inputs to the ECU from things like the CTS and FTS, MAF, pedal position, etc.
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 27, 2011, 07:04:47 pm
I'm pretty sure my buddy looked at the coolant temp on the vag and said it was good,
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 28, 2011, 07:09:22 am
The car was a real pain to start cold, it would crank and crank and crank, we tried to adjust the IQ and no go, I did the hammer mod and the car fires up faster and isn't missfiring when first started, now you can feel the DMF going,

There still seems to be a bit of hesitation after she's syarted and you leave but when it's warm it's got wayyyyy more power
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 28, 2011, 01:12:44 pm
Did this problem start all of the sudden? Was it running fine one day and then the next day it started misfiring and such?
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 28, 2011, 07:53:05 pm
Did this problem start all of the sudden? Was it running fine one day and then the next day it started misfiring and such?

It would changed from 5 minutes to another, i won't be fixing it for a bit, thr turbo over boosted blew an intercooler line and thru it into the powersteering pump blowing a huge hole in it with possibly plastic going into the motor
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 29, 2011, 04:36:29 pm
Was this problem present before blowing off the charge pipe? Is the intake manifold clean?
Title: Re: TDI stumbles and miss fires
Post by: 8v-of-fury on June 29, 2011, 04:37:49 pm
Yes to both questions.
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 29, 2011, 06:27:35 pm
Yes to both questions.

Yea I cleaned the intake my car only has 230,000kms on it, the IQ was out of whack again so I'm positive it's the pump, but no worries I'm tearing thr motor apart soon to start rebuilding it,
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 29, 2011, 10:38:45 pm
Ok, so are you saying nevermind, lets not worry about it anymore? :p
Title: Re: TDI stumbles and miss fires
Post by: 8v-of-fury on June 30, 2011, 10:21:00 pm
he's saying 11mm pump :)
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on June 30, 2011, 10:41:24 pm
he's saying 11mm pump :)

Yes I am,
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on June 30, 2011, 11:22:08 pm
Why not a 12mm?
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on July 01, 2011, 06:36:38 am
Why not a 12mm?

Don't even tempt me lol I would is the worst part just so I can scare the *** out of a few friends lol
Title: Re: TDI stumbles and miss fires
Post by: vanagonturbo on July 01, 2011, 02:58:39 pm
soooo 12mm then? :p
Title: Re: TDI stumbles and miss fires
Post by: catlin_cava on July 03, 2011, 03:36:59 pm
soooo 12mm then? :p

You win im going to get it price out to have one built,
Title: Re: TDI stumbles and miss fires
Post by: gulmat on July 03, 2011, 06:07:12 pm
man up and put that into your car!!

(http://img.photobucket.com/albums/v246/Gulmat/DSC_2149.jpg)
Title: Re: TDI stumbles and miss fires
Post by: R.O.R-2.0 on July 07, 2011, 03:01:24 pm
man up and put that into your car!!

(http://img.photobucket.com/albums/v246/Gulmat/DSC_2149.jpg)

wow... now that is one hell of a diesel..

i wonder how many TDIs we could build out of that if we melted it down?
Title: Re: TDI stumbles and miss fires
Post by: Golfobricolo on July 20, 2011, 08:38:12 am
man up and put that into your car!!

(http://img.photobucket.com/albums/v246/Gulmat/DSC_2149.jpg)
Mdrrr  ;D ;D ;D
It's light motor  ;)