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Author Topic: Rough idle  (Read 6033 times)

Offline corradovr6

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Re: Rough idle
« Reply #30 on: January 09, 2020, 08:08:31 am »
I had a rough idle caused by the dipstick seal believe it or not- new one sorted it

Offline St282

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Re: Rough idle
« Reply #31 on: January 09, 2020, 08:40:04 am »
I had a rough idle caused by the dipstick seal believe it or not- new one sorted it
That would be vacuum leak. Another culprit those things lol


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Offline fahim4094

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Re: Rough idle
« Reply #32 on: February 06, 2020, 07:37:29 am »
Hi Guys
@St282 @titchy @Pudding

Got my inlet clean yesterday (Inlet was dirty) and injectors tested (Injectors are fine) by ASK tuning - unfortunately, my cylinder 2 is misfiring because the ring/piston is damaged  :sad1:

Thinking if I should just sell the car as it is as I have spent so much money on it, the last 2 months I spent near £2k on it.

or should I do a CDL engine refurb someone is asking for £2k. This is what they are going to do below

Engine block thoroughly cleaned & surfaces treated
Engine block surfaces machined flat
Tolerances checked on wearable items
Oil pumps inspected/replaced if necessary
Cylinder head skimmed or replaced if necessary
New OEM oil seals installed
New OEM valve seals installed
Valve seats machined
Valve lapped to ensure a tight seal
Block cylinders inspected for cracks
New cylinder liners fitted
Cylinders machined to factory specification
New upgraded gas nitride ion piston rings fitted
Connecting rods inspected & machined if necessary
Crank shaft crack tested, ground & polished to specifications
New OEM big end bearings fitted
New OEM main bearings fitted
New OEM spec Eristic head gasket fitted
All bolts torqued to specification in accordance with Auto data
Assembled units oil pressure tested
Assembled units compression tested

Offline titchy

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Re: Rough idle
« Reply #33 on: February 06, 2020, 08:56:40 am »
Is it running if so is it o.k?

Offline fahim4094

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Re: Rough idle
« Reply #34 on: February 06, 2020, 11:34:10 am »
Hi @titchy

Car starts fine, drives okay, you can hear and feel the misfire still judders and engine light flashing


Offline bobby_fodge

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Re: Rough idle
« Reply #35 on: February 06, 2020, 12:33:00 pm »
How was the ring/piston damage identified?

Offline titchy

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Re: Rough idle
« Reply #36 on: February 06, 2020, 12:41:58 pm »
Fahim if you send your email address I can send you pics of the part that caused my problems. Kevin

Offline fahim4094

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Re: Rough idle
« Reply #37 on: February 06, 2020, 05:00:58 pm »
Hi

@bobby_fodge AKS tuning used a camera and a cylinder compression test

Offline fahim4094

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Re: Rough idle
« Reply #38 on: February 06, 2020, 05:02:42 pm »
Hi @titchy sent you a PM

Offline bobby_fodge

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Re: Rough idle
« Reply #39 on: February 06, 2020, 08:28:08 pm »
Hi

@bobby_fodge AKS tuning used a camera and a cylinder compression test

Have you asked Aks for a quote just to replace the piston?

You could then compare that cost against the cdl engine swap

Offline fahim4094

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Re: Rough idle
« Reply #40 on: February 06, 2020, 10:11:46 pm »
@bobby_fodge

I think it would be more complicated because there could be other issues if they start stripping it, so they said engine swap or rebuild is the best options

Offline Pudding

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Re: Rough idle
« Reply #41 on: February 07, 2020, 04:54:12 pm »
Oh no, sorry to hear that mate.  Breaking a piston is a very real possibility with aggressive Stage 2+ tunes unfortunately, especially if you pick up a bad tank of fuel or accidentally put 95 RON in it.

It was going to be my next suggestion if injectors didn't solve it.

You could opt for just a single piston and ring set but chances are the cylinder bore is scored, which will need an oversize rebore and matching piston/ring set.  A nice set of Wossner forged pistons will set you back £600ish, and a cylinder hone shouldn't be more a few hundred at a competent machinist.

A CDL is a good option but I'd personally go with a good low mileage one over a refurb tbh.

Obviously if you sell the car as it is, it will limit your prospective buyers and value sadly.   Catch 22.






2007 ED30 | Ohlins Coilovers | Revo Map | Plus some other stuff | Is all a GTI needs :-)

Offline fahim4094

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Re: Rough idle
« Reply #42 on: February 07, 2020, 05:44:49 pm »
HI @Pudding

I found someone near me who said they can refurbish my whole engine (£2.1k) so I might do that, I called R-tech to confirm if that's okay they said refurbishing would be fine, I believe the company will sort the piston issue also.

I would of forged the engine, but i'm on a budget spent loads on this car already, almost had the car for 2 months

The guys that I am going to are well known with refurbishing engines, a lot of people that I spoke to said refurbishing it is a good idea.  I guess if it's refurbed, back of my mind I know the engine is new in a way.
« Last Edit: February 07, 2020, 05:58:46 pm by fahim4094 »

Offline Pudding

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Re: Rough idle
« Reply #43 on: February 07, 2020, 06:22:17 pm »
I don't see how they can do it for that cost when a set of genuine pistons, rings, bearings, valve stems/seals, gaskets, chain gear etc etc is over half that......plus machining labour. 

If it were me, I'd be looking for something like this instead.  Trust me, no refurbished engine is ever as good as a factory one.  I speak from experience.

https://www.ebay.co.uk/itm/COMPLETE-CDL-ENGINE-VW-R20-AUDI-S3-2-0-TFSI-CDL-COMPLETE-ENGINE-WITH-TURBO-ECT-/274021948069











2007 ED30 | Ohlins Coilovers | Revo Map | Plus some other stuff | Is all a GTI needs :-)

Offline akbarirfan

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Re: Rough idle
« Reply #44 on: November 25, 2020, 04:06:25 pm »
@fahim4094

How did you get on here?