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Author Topic: If it's not the DV or the coil packs what is it? - Update and confused!  (Read 20821 times)

Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #30 on: October 01, 2011, 06:15:05 pm »
Surely if it was a sensor it would give me fault codes?

Would a loose spark plug or a boost leak give me this pulsing effect at higher revs?
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Offline Tfsi_Mike

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Re: If it's not the DV or the coil packs what is it?
« Reply #31 on: October 01, 2011, 06:24:52 pm »
What software do you have?
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Saint Steve

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Re: If it's not the DV or the coil packs what is it?
« Reply #32 on: October 01, 2011, 09:00:51 pm »
Does your car do the fault in stock mode with no map installed mike?
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Offline Tfsi_Mike

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Re: If it's not the DV or the coil packs what is it?
« Reply #33 on: October 01, 2011, 09:04:44 pm »
Quote from: Saint Steve on October 01, 2011, 09:00:51 pm
Does your car do the fault in stock mode with no map installed mike?

After re reading John_o's thread about the duff APR map from Awesome I thought my ongoing disatisfaction with the mapping has more reasoning but.....

Yes it misfires on stock settings too....

Although I dont know if 'Stock' is genuinely OEM stock settings or APRs 'stock settings'...?
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Saint Steve

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Re: If it's not the DV or the coil packs what is it?
« Reply #34 on: October 01, 2011, 09:10:31 pm »
Have you done a compression test mike?

This does sound like your looking at a mechanical failure rather then a electrical issue, when you remove your dipstick with no difference in engine idle is most concerning , and the pcv is one thing to do before getting out the compression tester IMO.
« Last Edit: October 01, 2011, 09:16:49 pm by Saint Steve »
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Offline Tfsi_Mike

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Re: If it's not the DV or the coil packs what is it?
« Reply #35 on: October 01, 2011, 09:13:52 pm »
Quote from: Saint Steve on October 01, 2011, 09:10:31 pm
Have you done a compression test mike?



However, PDT Dave was asking Robdf2 about the extent of testing and it seems for a propper result the compression testing needs to be more in depth.

I dont know to what extent the above test was done, only know it only took them 30 - 40 mins...
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Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #36 on: October 01, 2011, 10:30:52 pm »
Well after what you said about dipstick noise Mike, I went out to the garage, started it up and tried to pull dipstick out, it nearly stalled and would have done if I hadn't stuck it back in... Is yours not doing this? That mean I can rule out this Pcv?
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Offline Tfsi_Mike

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Re: If it's not the DV or the coil packs what is it?
« Reply #37 on: October 01, 2011, 10:35:07 pm »
Quote from: E30Dom on October 01, 2011, 10:30:52 pm
Well after what you said about dipstick noise Mike, I went out to the garage, started it up and tried to pull dipstick out, it nearly stalled and would have done if I hadn't stuck it back in... Is yours not doing this? That mean I can rule out this Pcv?

Pulling my dipstick out makes next to no difference  :confused: :scared:

The Seat tech said thids morning it was nothing to worry about???  :confused:  He said on the Audi 5cyl Engine hunting would happen but not neceserilly on my engine?
Im still going to try the new PCV...
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Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #38 on: October 02, 2011, 10:02:54 am »
I'm running Revo but hopefully the garage will flash back to stock to see if still happening...

Did find this though, sounds similar symptoms...

http://golfmkv.com/forums/showthread.php?p=2262963
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Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #39 on: October 02, 2011, 10:18:02 am »
Mike,

I'm sure my garage is gonna do some more logging... but a question for you...

When you open the drivers door and you hear the fuel pump prime. which I believe is a low pressure pump from the tank, how does it sound, smooth or lumpy? Mind sounds a bit wheezy...
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Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #40 on: October 02, 2011, 10:25:50 am »
Cam lobe wear
Background:
Excessive wear of intake camshaft lobe that drives the high pressure fuel pump. The wear limits maximum pump piston lift, causing fuel rail pressure fluctuations. The intake cam drives the fuel pump:

Symptom:
-Fuel cut-out when driving, esp. under WOT.
-Fuel cut-out symptoms range from soft pulsations of power to long-pulse bucking while in high-gear high-load situations (high gear at WOT, or up a grade). MIL may flash if cut-out is severe. Car will also go into hard-limp (no boost, 4500RPM limit) if severe enough.
-MIL ON
-P0087 Fuel Rail / System Pressure - Too Low
-P1093 Fuel Trim 2, Bank 1 Malfunction
-P2293 Fuel Pressure Regulator 2 Performance

Solution:
Increase surface hardening of camshaft lobe for the high pressure fuel pump. Improved intake camshafts have Part No. 06F109101B. Refer to TSB# 15 07 04
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Offline Tfsi_Mike

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Re: If it's not the DV or the coil packs what is it?
« Reply #41 on: October 02, 2011, 10:49:29 am »
Quote from: E30Dom on October 02, 2011, 10:18:02 am
Mike,

I'm sure my garage is gonna do some more logging... but a question for you...

When you open the drivers door and you hear the fuel pump prime. which I believe is a low pressure pump from the tank, how does it sound, smooth or lumpy? Mind sounds a bit wheezy...

Errm, sounds can be hard to describe I'll see if a video will capture it later on  :happy2:
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Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #42 on: October 02, 2011, 05:17:41 pm »
Not sure how the DV works but should it be open or shut under boost?

And does this look right? The last bit of travel looks/feels a bit stiff...?



Comments appreciated...

(sorry to hijack OP post but seems he could have a similar prob to me...)
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Offline Tfsi_Mike

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Re: If it's not the DV or the coil packs what is it?
« Reply #43 on: October 02, 2011, 05:21:30 pm »

It's all relevant & constructive though  :happy2:
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Offline E30Dom

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Re: If it's not the DV or the coil packs what is it?
« Reply #44 on: October 02, 2011, 05:56:33 pm »
I hope so...

Another helpful video... not sure if my turbo drops boost this much, but then again i have no gauage...



I'm now thinking bad DV or boost leak... Hopefully garage will EVAP smoke test it...
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