Any help and advice gratefully received. Golf Gti Mk5. EPC and EML.

[MS1]

Cooling fans started going off, two hours after I drove the car! Diagnosed as a faulty coolant sensor. Replaced that and at the same time had a cambelt kit, water pump and thermostat, as well as a Neuspeed crankshaft pulley. Also replaced the throttle body hose, with a Forge one, as the old one looked tired.

Picked the car up on Friday pm. All was well, although I noticed a flat spot in second gear from about 2,800rpm through to 3,500rpm, which it's never suffered from before, usually no hesitation just full boost and crazy acceleration all the way to 7,200rpm.

Noticed a slightly different exhaust note too, especially at low revs, but also throughout the whole rev range. I thought to myself, 'I've had the new engine mounts, dogbone mounts, crankshaft pulley etc, so it must all be related'. Although I hadn't entirely convinced myself.

Yesterday I stopped to let a car pull into a junction. Went to give it some stick in first gear as I pulled away and about a quarter of a second into my take off, the car just died, like I had hit the brakes as hard as I could. EPC and EML came on, car went into severe limp mode, idle was around 1,150rpm, exhaust note was bizarre, juddering all over the place, so much so the tailpipes were rattling around like crazy.

TIA

[r5gtt]

Hi firstly car need scanning for error codes with vagcom vcds.

Someone else had these lights come on and other members said it was the throttle body causing this. I'd probably say it is but get it scanned first. 

[MS1]

Firstly, thanks for replying mate, I appreciate your time and comments. I'm getting it plugged in tonight, hopefully. Won't be VCDS, but Bosch equivalent or similar. In hoping it's an easy fix. As I mentioned I replaced the throttle body hose for a Forge one, basically identical to OEM one, could this have had a knock on effect?

[r5gtt]

If your issue was there from before then I'd very much doubt it.

vcds wouldn't have been better as it's recommended for VAG cars. volkswagen audi group that is including skoda seat.

I get a manifold runner fslp blah blah code too so I'm guessing it's that.

Let us know and good luck. 

[MS1]

Well, fingers crossed it's something simple. I'll report back in good time. Everyone I've spoken to, from what I've depicted, seems to be indicating boost leak of some description, so here's to it being a split pipe or failed jubilee clip!

Obviously well aware of VAG com, living in a remote part of Devon, it's not easy to come by, I'm very friendly with my local independent and they often plug my car in for no cost. The only local garage with VAG com want £90 an hour, minimum charge £45 regardless of duration of diagnostics and they never seem to be particularly helpful.

Can you elaborate on your manifold runner flap code?

[r5gtt]

You may as well buy s clone vag com 

start your car and pull the dip stick out not fully and see see if the car judders if it does your PCV is  if it doesn't replace it.

[MS1]

Ive got a BSH PCV blanking plate, so does that still apply?

[MS1]

Ps. A clone VAG com? Not sure I understand your humour?

[r5gtt]

Ps. A clone VAG com? Not sure I understand your humour?

It's not humour and I was being serious  it will help as you own a vag car so always good to keep a diagnostics cable.

Throttle body has a flap inside and the electronics fail causing this to not fully function. I need one too as I'm getting certain juddering and a lumpy running and also has that fault code. I'll post it up later and a few other issues I need to address if someone can help me with it 

I'd remove that bsh*t and fit on a revised PCV as it will help your car run better and guys have told me not to get what you have or even similar as they aren't good for our cars.

there's one but can't remember the name and it's meant to be a recommendation for pcv delete. ask around the forum.

[MS1]

Okay, understood :)

I've had that BSH PCV Kit on for 60,000 miles. Oil changes every 3,000 miles and flushes every 6,000. Hasn't seemed to cause any issues. I'd be intrigued to know more.

It'll be interesting to see of the throttle body flap is at fault. Will keep you posted in the morning. Cheers for all your help mate.

[MS1]

It's actually a BSH PCV revamp kit I've got.

[r5gtt]

You really need @rich83 or Dan forgot the rest of his user ID me - as they are more of the experts on here.

[MS1]

It would be good to get some more info regarding it. I had read that the blanking plate just allows all the muck to be recircualted back into your engine, hence getting the fix kit. I also explored catch cans, but followed various threads on the GolfGtiForum comparing to the two over many thousands of miles and it seemed there was very little to be gained in an operational sense or in terms of maintenance, especially if you do regular oil changes. Obviously if one chooses to have huge intervals between oil changes and only uses 95 or 97 ron fuel, then I guess that person would need to do everything they could to prevent build up in the engine.

I've looked after my old girl very well and she's had 4.6L of Mobil One 0W40 every 3,000-3,500 miles for nearly 70,000 miles, as well as the Forte engine flushes every second change. Only ever run on V-Power, apart from the occasional £20 fill up on Techron 97 when I'm not near a Shell station. The oil is obviously black every change, but it's never bad so to speak and the filters come out clean everytime, obviously they still get replaced, but clean nonetheless. I also had the inlet valves cleaned manually at 60,000 miles and will be having them done again at the next oil change which falls bang on 100,000 miles. I had Terraclean performed on the car once and the technician who performed the clean said to me, although it's much more beneficial to diesel cars, he'd never seen as clean a results as he did from my car. In fact all it seemed to do for me was cause my car to constantly throw up a post cat faulty o2 sensor, which was duly deleted by my mapper.

Cheers again mate.

[MS1]

Turns out the ecu had muddled it's parameters for the throttle body because the battery was disconnected for four or five days.

[r5gtt]

Are you saying it's fixed now?.