A4 B5 1.8T Stalls While Driving

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funky_lemon
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A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

Hey All,

I was hoping that you guys would be able to assist.
My Audi B5 is driving me insane.
its a 1.8T (APU engine code) DBW

Heat guage was behaving erratic and would sometimes just drop and it would strangely trigger the oil light.

None the less, the vehicle used to also refuse to start after it was parked off for 5 minutes, if you went into a shop perhaps and came back.
it would swing, but not start.
You would have to wait at least 5 or so minutes and then start.

Ran the diagnostic when its service was done with a friends diagnostic machine, and coolant temp sensor came up as an issue.
I replaced this with a Goldwagen part, heat guage started behaving again, no oil light and no more non start......... or so I thought.

Well the vehicle has recently been doing the same thing again with regards to the non start, the only problem now is that it also happens while you driving.
Car just looses power and dies.
No engine light, nothing, and it cant even be kickstarted if you rolling.

I have to park off on the side of the road, and swing it it, but it still wont start.
Wait 5 to 10 minutes and she fires up no issues.
This used to happen once every 4 or 5 days, but now its has become a daily occurence and just today its stalled while driving 3 times.

Thought it could have been transponder, but the light with key on dashboard does not light up.
Thought maybe fuel pump, but I can hear it clearly when the igniition is turned on.

Have any of you experienced anything like this and perhaps have any thoughts on the problem?

I have been told that it could be the crank angle sensor
15 VW Tiguan 2.0TDi BMT - Current
06 BMW 320D M-Sport - Current
98 Toyota Corolla 180i - Sold
01 AUDI A4 (B5) 1.8T - Written Off
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Re: A4 B5 1.8T Stalls While Driving

Post by jtm »

If you see my post on the same page regarding my Mk4 GTI intermittent starting issues, i guess the best advice is to scan the car first and get an idea.

Given the common issue though regarding crank angle sensor, i replaced it yesterday, before getting the car scanned.
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

jtm wrote:If you see my post on the same page regarding my Mk4 GTI intermittent starting issues, i guess the best advice is to scan the car first and get an idea.

Given the common issue though regarding crank angle sensor, i replaced it yesterday, before getting the car scanned.
Appreciate the response, and has the vehicle behaved from yesterday until today with the Crank Angle Sensor?
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Re: A4 B5 1.8T Stalls While Driving

Post by jtm »

funky_lemon wrote:
jtm wrote:If you see my post on the same page regarding my Mk4 GTI intermittent starting issues, i guess the best advice is to scan the car first and get an idea.

Given the common issue though regarding crank angle sensor, i replaced it yesterday, before getting the car scanned.
Appreciate the response, and has the vehicle behaved from yesterday until today with the Crank Angle Sensor?
Yup, so far so good. Hope it stays that way :smile:
VW MK7 GTI DSG. White.
MB C200 Avantgarde A. Palladium Silver.


Ex's
2006Mk5 Jetta 2.0 TFSI DSG. Silver
2002Mk4 Gti. Silver
2008 MB C180k Avantgarde A. Silver
2011 6R Polo Gti. Silver.
2005 9N TDI Sportline. White
2001 MK4 GTI. Black. Sunroof.
1996 MK3 GTI. White. S3 wheels.
2000 MK4 2.0 Highline.GTI Wheels.
1991 MK2 GTI. White. (Best car owned ever)
1991 MK1 CTI. White. Momo EVO1's
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

Update:

:bang: :bang: :bang: Replaced Crank Angle Sensor, and it behaved for a while.
Thought I had the problem sorted, now the same story again.

I am at my wits end with this car!

Any help would be appreciated guys..... anybody had similar issues?
15 VW Tiguan 2.0TDi BMT - Current
06 BMW 320D M-Sport - Current
98 Toyota Corolla 180i - Sold
01 AUDI A4 (B5) 1.8T - Written Off
91 MK2 GTI 2.0 16V - ABF (Yeah baby!!!) - SOLD
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Re: A4 B5 1.8T Stalls While Driving

Post by jtm »

Maybe MAF sensor?
VW MK7 GTI DSG. White.
MB C200 Avantgarde A. Palladium Silver.


Ex's
2006Mk5 Jetta 2.0 TFSI DSG. Silver
2002Mk4 Gti. Silver
2008 MB C180k Avantgarde A. Silver
2011 6R Polo Gti. Silver.
2005 9N TDI Sportline. White
2001 MK4 GTI. Black. Sunroof.
1996 MK3 GTI. White. S3 wheels.
2000 MK4 2.0 Highline.GTI Wheels.
1991 MK2 GTI. White. (Best car owned ever)
1991 MK1 CTI. White. Momo EVO1's
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

jtm wrote:Maybe MAF sensor?
I dunno hey.... maybe a possibility

I'll switch it on later and unplug the MAF.
If the idling goes wonky, then its fine, if it stays the same, maybe I'll have the culprit.
Pynoxim wrote:Happened to me today as well, for some reason when I get to 1/4 tank of fuel my car does weird stuff.
You know, that could be with mine as well. Usually when the tank has fuel, it seems to behave.
The problem - I THINK - occurs when the vehicle is on quarter and below.

Could that be a fuel pump problem - it does prime, and I hear it when i switch the ignition on - but im not sure if its supposed to prime everytime ou turn ignition?
The reason I say this is becuase if the vehicle stalls, I switch off completely.
When I turn the key to the ON position, I hear the prime.
I then attempt to start and nothing.
I turn the key off again and immediately try to start again - So when I start immeadiately again, is the pump supposed to prime again or not.
Becuase if it is, then it doesnt?
15 VW Tiguan 2.0TDi BMT - Current
06 BMW 320D M-Sport - Current
98 Toyota Corolla 180i - Sold
01 AUDI A4 (B5) 1.8T - Written Off
91 MK2 GTI 2.0 16V - ABF (Yeah baby!!!) - SOLD
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Re: A4 B5 1.8T Stalls While Driving

Post by missioner »

Pynoxim wrote:Mine would prime everytime after a failed attempt at starting the car and I could hear the fuel pump priming however it wasn't really getting any fuel so it wasn't able to provide the correct amount of fuel at the correct amount of pressure and therefore the car wouldn't start.
A running pump and a pumping pump can be two different things.

get hold of a pressure gauge and plug it into the fuel rail, normal is 3.5bar and if you remove the fuel pressure regulator fuel pipe it should go over 4 bar at idle speed. Anything below 3, new pump Bro.
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Re: A4 B5 1.8T Stalls While Driving

Post by Smok3X »

missioner wrote:
Pynoxim wrote:Mine would prime everytime after a failed attempt at starting the car and I could hear the fuel pump priming however it wasn't really getting any fuel so it wasn't able to provide the correct amount of fuel at the correct amount of pressure and therefore the car wouldn't start.
A running pump and a pumping pump can be two different things.

get hold of a pressure gauge and plug it into the fuel rail, normal is 3.5bar and if you remove the fuel pressure regulator fuel pipe it should go over 4 bar at idle speed. Anything below 3, new pump Bro.
+1

This sounds like faulty FPR to me.

A QUICK easy test.

Take a pliers and squash the fuel RETURN hose after the fuel rail and if it starts then you know its Fuel Pressure related.
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funky_lemon
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

UPDATE - checked MAF, unplugged it and idle goes wonky, so I know its working.

Fuel pump pumping

I did however see while cleaning out MAF that the igniter module on the airbox has a crack.
Now, I'm certain that if there was an issue with it, it would cause a misfire and then cause the vehicle to die? Wouldn't it?

The vehicle just dies with no warning.

Would a scan be able to pinpoint the issue, becuase a friend of mine had an issue on his MK4 Gti, and the faulty module was never picked up on the scan.
However, his symptoms were different to mine, in that his vehicle used to misfire and even after replacing coils it would sputter and die.
Replaced the igniter modeule and Bobs your Uncle it was sorted.

So the question is, do you guys think that my cracked module would cause the vehicle dying or am I just on a fruitless money spending exercise and rather have it scanned.
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

bump -Anyone?
15 VW Tiguan 2.0TDi BMT - Current
06 BMW 320D M-Sport - Current
98 Toyota Corolla 180i - Sold
01 AUDI A4 (B5) 1.8T - Written Off
91 MK2 GTI 2.0 16V - ABF (Yeah baby!!!) - SOLD
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Re: A4 B5 1.8T Stalls While Driving

Post by missioner »

igniter module may be a possibility. on many vehicles ignition circuits often are NOT diagnosable. testing on a tester (if available) or swop out a working one from an identical vehicle and see what happens.
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

Update - Could not get anyone with a scanner to come to me since the vehicle couldn't be driven in case it died on the highway, so didn't have the car scanned, but removed the number 30 ECU relay in the ECU box, and replaced it.

The car seems to be behaving for the last 2 weeks normally, so I think I may have sorted it.

So just thought I would update in case someone experiences the same issue ever, since it drove me insane.

Strange thing though is that when I removed the casing of the original relay it didn't show any signs of dry solder joints or anything, so it still begs the question if the car may still die again, since the relay showed no signs of failure?........ I guess I will just have to wait and see.
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Re: A4 B5 1.8T Stalls While Driving

Post by funky_lemon »

Update: So the dreaded switch off while driving is back.

To put it in perspective:
Service - Done
Plugs - Replaced
Vacuum Leaks - Checked and replaced one hose
Fuel Pump - Checked - Pumping
MAF Checked - Working
Throttle Body - Cleaned
Coolant Temp Sensor - Replaced
Crank Angle Sensor - Replaced
No 30 ECU Relay - Replaced

Matches & Paraffin - So tempting

So anymore input from you guys would help before I try the Matches and Paraffin please?
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98 Toyota Corolla 180i - Sold
01 AUDI A4 (B5) 1.8T - Written Off
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Re: A4 B5 1.8T Stalls While Driving

Post by 22irwin.mercure »

Engine speed sensor?

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Re: A4 B5 1.8T Stalls While Driving

Post by THANAS »

How did you check the pump?
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Re: A4 B5 1.8T Stalls While Driving

Post by panic-mechanic »

Whoo hoo another newbie thread revival.
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Re: A4 B5 1.8T Stalls While Driving

Post by xXSiLENt_kiLLAXx »

Hi!

Were you able to fix your intermittent issues?
Sorry I'm reviving the thread but having the same issues. Before it would start up within 15 min. Now it hasn't started in 3 days.... :crazy: :crazy: :crazy:

Any information would gladly be appreciated.

Thanks
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Re: A4 B5 1.8T Stalls While Driving

Post by panic-mechanic »

What have you done to diagnose the issue.
Is there spark?
Is there fuel - pressure and does the injectors fire.
Is there compression
Is the timing belt intact
Have you scanned it for faults
Do you see rpm on the cluster when it cranks.
Does it crank?

You give absolutely NO data but want a reply to fix it.
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Re: A4 B5 1.8T Stalls While Driving

Post by xXSiLENt_kiLLAXx »

Hi boss,

My knowledge isn't as vast as most guys who work on their cars but I do know a little bit. Sorry for the delayed response.

Basically we checked the fuel pump, fuel filter, spark plugs(first time had issues because it was full of oil/petrol) smelled like petrol and looked like oil
Changed the spark plugs
When we do a diagnostics, it says CO2 sensor but that was the code for years and.never cleared it. Basically no other codes pop up.
It cranks but doesnt start and when it does start you can drive it for a bit then it dies out on you and you might have to wait 15 min or sometimes 3 hours to get it back up and running.
Timing belt are all in tact
Thank you once again for the reply.

Best wishes.
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Re: A4 B5 1.8T Stalls While Driving

Post by panic-mechanic »

sounds like no or bad spark or very much overfueling
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Re: A4 B5 1.8T Stalls While Driving

Post by xXSiLENt_kiLLAXx »

It probably is over fueling. My buddy said that the tapper cover gasket could be leaking but besides that.... the car was running. And now it is totally dead. The mechanic cant seem to find the cause of what makes the starting intrrmittenet
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Re: A4 B5 1.8T Stalls While Driving

Post by panic-mechanic »

Get another mechanic. The things I mentioned are the basics. If you can't test and figure out which one is absent or incorrect then he should not be a mechanic.
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'05 Touareg v10

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Re: A4 B5 1.8T Stalls While Driving

Post by xXSiLENt_kiLLAXx »

Hi,

Just an update.

It was the Fuel Relay 30 that was giving issues. As soon as you move the copper plate down it starts.
So it wasnt making proper contact.
Thank you once again for all your help.
Current: Audi A4 B5 1.8T 2001

Ex: Golf MkIII GTi 2e 1994
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