Autotech internals and the recent failure trends

[Janner_Sy]

well its come to note over the last few weeks that there are people experiencing issues with stage 2+ and uprated fuel pump internals.

Mainly the faults seem to be a result of the fuel pump seal failing under pressure due to the stepped design on the pistons.  This means the oil and petrol can mix in your engine which is obviously not good.

From what I gather APR HPFPs dont suffer from this as they uprate this seal, and dont use a stepped piston.  Also they are all tested prior to being distributed.

Forum rumour has it that this seal led to REVOs own demo leon ruining an engine, and there are numerous other guys across the forums with the uprated internals that luckily have caught the failed pump before it went really wrong.  

if you could all state the type of internals you have used ie KMD,  Autotech etc, and whether it was fitted by yourself or a specialist.

[Janner_Sy]

i had my autotech HPFP internals fitted 10k, done by AMD essex.  now being used on CupraK1s motor.  not heard of any issues since.

[KRL]

Autotech Internals fitted at TTS Roadsport and so far have covered 8k with no known problems.

[danishmkvgti]

APR rebuild my extra pump, and been running it for 40.000km, no problems 

[bacillus]

No issues with my APR pump...   

[djhorace]

I ran mine for over 20k and suspected a failure prior to selling the car - I used KMD internals.

Was planning to fix and sell the pump, but putting it to APR to be converted instead.

[vRSAlex]

Ive had over 5 KMD internals seize, destroying followers, pump housings and cams.  We dont touch them now.  Also had 1 or 2 autotechs seize.  Never had an issue with an APR pump.  With the KMD/AT pumps, they use the standard spring and never seem to be able to hold full fuel pressure even on fuel 9 on Revo.  APR pumps always can.

Ive been running APR for around 6-8K now.

[KRL]

KMD internals seem to have seizure failures all the time from reading across the forums.  Not heard of any recent seizure problems with Autotech though, were the seizures you experienced with the older revision pumps - i.e. v1s?

[Janner_Sy]

alex did the autotech pumps seize or was it seal related?

[SteveP]

40K+ on KMD internals for me with no problems 

[yin]

No issues with my APR pump 10k now

[vRS Carl]

53K on Autotech.

Changed to APR

724 miles on APR - No probs so far

[PDT]

20k+ miles on my Autotech internal kit with no problems.

Have sold 60+ Autotech kits in 2010 and not had 1 back under warranty, have fitted probably more than 100 kits over the years, again not one warranty issue. In this time we have had 5-6 cars come in with failed original fuel pumps/pump components on 100% standard cars.


The problem seems to be the actual seal not the internals, and again, only when the software demands a higher pressure.

So seal+software is the problem, the pump internals themselfes are just a stepping stone. Regardless, as a UK distributor of Autotech parts I am today sending them an email, I will update you with their response 

[KRL]

20k+ miles on my Autotech internal kit with no problems.

Have sold 60+ Autotech kits in 2010 and not had 1 back under warranty, have fitted probably more than 100 kits over the years, again not one warranty issue. In this time we have had 5-6 cars come in with failed original fuel pumps/pump components on 100% standard cars.


The problem seems to be the actual seal not the internals, and again, only when the software demands a higher pressure.

So seal+software is the problem, the pump internals themselfes are just a stepping stone. Regardless, as a UK distributor of Autotech parts I am today sending them an email, I will update you with their response  

Thanks Dave, I also sent Autotech an email yesterday asking for their thoughts on this.

With regard to the OEM seal and the sw requesting too much fuel pressure as far as I know all 2+ maps request 130 bar.  One thing which crossed my mind is that maybe the RS4 valve could make this issue more likely to happen as this will allow the pump pressure to go up to 136 bar.

As you said above I think people need to bear in mind how many pump internals have been fine for 10s of thousands of miles versus the number that have failed.  I bet in reality the failure percentage is less than 1%.

What is of interest to me is for the pumps with seals that have failed I would like to know a few things:
1.  What SW were they running and for how many miles?
2.  How were the internals installed?
3.  How has the car been driven?
4.  How many miles did the pump have on it before the internals were installed?

On a separate note I would like to know if the spring engergised seal (the failing seal) can be replaced?  There does not seem to be VAG part number for it but it does not mean it can't be done.  Perhaps this is something you could look into and maybe offer as a service?

[micky 32]

I bought my Autotech second hand, i have done 65k with no probs.