My car's recently developed an issue that I'm having a problem solving.
The car is a Mk6 VW Golf 1.6 diesel.
1st start of the day it will either fire up straightaway or fire up & run very rough, rpm dial bouncing from 800 to 1400 rpm then die. When it does this it'll take 3 or 4 attempts to start & be fine for rest of the day.
The car has 126k mls, 10yrs old & regularly serviced.
I put diesel cleaner through every other month
& do about 3k mls a month.
The issue is apparent regardless of season or temperature, wet or dry & is very random
Ideas??!!
sounds like one for
@grog
Have your battery and alternator checked, sounds like a failing battery or faulty regulator on the alternator that's potentially causing inconsistent injector operation. Get a code reader on it and check the DTC's.
You can also do a hard reset by disconnecting the battery terminals from the battery and holding +VE and -VE leads together (away from the battery) for about 30sec, this discharges the capacitors etc in the ECU and resets it.
Also check your intake for any leaks or cracks, false air will confuse the map (manifold air pressure) and maf (mass air flow) sensors.
Don't know if these are turbo diesels, I assume so, so also check the air intake and exhaust connections to the turbo for leaks or damaged gaskets.
Just my thoughts... hope this helps
Check your fuel lines, that sounds like classic air in fuel symptoms. Once it sucks the air through it runs fine till next time.
Thanks for replies, forgot to mention, no fault codes from ecu.
Sounds like air in system, where its coming from the hard part. Crook injectors can leak compression back overnight.
I mean compression can leak into fuel.
Thanks for tips, let you if/when I get it sorted.
Remembered today, when its playing up, give idle control motor a couple of taps with hammer. If it comes good, you know what you need.
Update. Fault traced to Egr valve. Cost of valve & labour prohibitive. Valve now blanked off, seems to be ok for now.
That's interesting, blanking off the EGR. Might look into that for the missus Demio, it's such an arse to get at.
Consider your next MOT before blanking off your EGR valve, as by doing so, it will increase your emissions considerably. Always worthwhile stripping it out and trying to soak/clean it before writing it off. :whistling:
The car'll be gone b4 next mot.
So my question is: Do you tell the next owner what you have done to the EGR valve???🤔🤔🤔
Personally I wouldn't sell it privately unless they were made aware. However, I would happily trade it in with a dealer and say nothing. Not sure what that says about my moral compass🙄
Phil,
It `says` that you don`t want anyone `sending the boys round` for a `chat`..... :rofl2:!
Quote from: Big Phil on Thursday, 15 October 2020, 01:00 AM
So my question is: Do you tell the next owner what you have done to the EGR valve???🤔🤔🤔
Personally I wouldn't sell it privately unless they were made aware. However, I would happily trade it in with a dealer and say nothing. Not sure what that says about my moral compass🙄
The car will be traded coz it'll have iover 170k mls on it by then & not worth a bean.
On a different note I'm considering a Cat C replacement when the time comes because by the time I've finished with a car after 3 years it's not worth owt anyway. Thoughts??
With the mileage you do a Cat C is a very good investment I would say. That's a shed load of hours on the road.
:hat:Check your insurance first:-
1. It`ll cost you more to insure.
2. Many insurers won`t touch Cat "anythings"....!
Never thought about insurance! Could be a deal breaker if it's very expensive. That said, I can't recall ever being asked on a written or internet proposal form if my vehicle was a Cat C or any other insurance right off to be honest. Having said that, never owned a write off so perhaps it's slipped my mind.
Up until recent times it was a rarity for me to own any car that hadn't been a write off...... should buff out :confused1:
Why does a Cat C cost more to insure ?
Technically, a Cat C shouldn`t cost more to insure, however, as many insurance companies won`t touch an ex. write-off (even a quality repaired Cat C), those that do tend to hike their rates `cause they can......
......just another area of the motor trade ripping customers off at every opportunity. :furious:
My mate just bought a 2018 Polo GTI.at auction. Fully hail damaged but low ks and perfect apart from dings. Cant insure it except has 3rd Party Property insurance, thats damage against other car or property. Says he doesnt care, if he crashed it, parts would sell for buying price. Cost him just under 6g, a perfect one around 35. Mighty fine little car, dents wouldnt worry me.