Polo 1.4 TDi engine shaking

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tau86
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Polo 1.4 TDi engine shaking

Post by tau86 »

Hi Everyone,
I am from Maseru, Lesotho and new in the forum, thanks for welcoming me. I have a polo 1.4 tdi which is at a mechanic now I drove for a day and the parked, after about 30 mins when I started it the engine started to shake very bad. There is no smoke coming out at exhaust but idling is not constant...goes po-porr...po-porr. Took it for diagnosis and says short curcuit/injector valve not opening for cylinder 1. Took injector to Pretoria to be checked and they said its fine. Put it again back..drove for a day and snap back again. diagnosis read same thing again. What could be happening here? by the way, revs are okay
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panic-mechanic
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Re: Polo 1.4 TDi engine shaking

Post by panic-mechanic »

wiring harnass error. Is it the 3 cyl PD tdi?
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
tau86
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Re: Polo 1.4 TDi engine shaking

Post by tau86 »

Yes...its a 3 cylinder... AMF engine
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panic-mechanic
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Re: Polo 1.4 TDi engine shaking

Post by panic-mechanic »

check or replace the wiring harnass in the head leading to the injectors. Common issue on them.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
tau86
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Re: Polo 1.4 TDi engine shaking

Post by tau86 »

Okay, will do so. Can also the injector pump on the right side of the engine cause this issue?
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panic-mechanic
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Re: Polo 1.4 TDi engine shaking

Post by panic-mechanic »

no the pump just makes pressure and the injectors are fired electrically. If the other 2 are working the pump is fine.

go read this to get a better understanding of the system
http://pics.tdiclub.com/data/516/VW_TDI ... peDuse.pdf
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
tau86
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Registered for: 6 years 10 months

Re: Polo 1.4 TDi engine shaking

Post by tau86 »

I am back, i cleaned the harness with Q20 and it didn't change. However, we found that the injector seal was the one with issues. There is no shaking now, we just did a small fix on the seal so I still need to get a new one with o-rings (machenic recommended). So all in all the engine runs perfectly apart from now I hear a qha qha qha sound when I drive...but its not there whn i rev engine on neutral or car idling...only whn i drive
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