Update On Lumpy Start

[smoggy7]

hi all ive had the car looked at by a friend of mine and he thinks this lumpy cold start is there is a miss in the engine when starting from cold and very lump unti it warms up any ideas as to what may be causing it to miss would be greatfull for any suggestions, i am going to put in some injector cleaner in the morning to see if it may be a dirty injector, thanks smoggy7

[jimjamjo]

I took my injectors off and a local injection specialist checked them for free - you might want to do that - it's very easy.

 

I got a mtr of new braided fuel pipe from eBay also for

[seatkid]

Lumpy/difficult cold start is often a problem with the glowplugs.

1st check you have 12 volts for a few seconds at your glowplugs when the ignition is turned on when cold. (Note though the indicator may go out after less than a second, the glowplugs should stay on for several seconds even after you start). If you have no 12v then its either the glowplug fuse or relay. If you do have 12v then one or more of the glowplugs may have gone - use a meter to check for them not being open circuit or high resistance.

[smoggy7]

hi thanks guys but i spoke to a diesel fitter today and it could be a thousand and one things this could be so phoned the garage where i had the car from and have agreed to get the car tested for more than half the price that frauds was going to charge me, i could change or have all these things tested but to do all this i rather go to the testing and get to the sole of the problem, unless someone is solid about what it is thats causing this to happen then i am going with the garage and i also get a car to borrow while it there so thanks anyway guys will post back soon as i get the result back ta smoggy7

 

i will go through the things that have been thrown at me,

injectors;;; well if it was this i would have a fault all day but the car drives wonderfull all day with no jerks or poor running.

timing --if the timing was out a small bit it would be there all the time not just on start up

glow plugs my light on the dash for this glows for about 5 secs thenwhen it goes off i turn the key and it starts

these are things i have had a chat today with a diesel garage but without them looking at it and hearing it from cold it is hard to say what it is. so as you can gather here lads but i think the test will be better they have a better chance to hear it from cold and to read the cdes if any are found.

 

ok when asked if my car had a management light i told them i havent seen this light up in the screen told the guy the year it is a 200l 19 tdi he told me there should be one on it, unless the bulb has failed or someone had disconnected it for a reason this however threw me a little does my car have one or not, and has someone disconnected it for some reason? anyway thanks for the feedback guys speak soon smoggy7

[seatkid]

hi thanks guys but i spoke to a diesel fitter today and it could be a thousand and one things

:ph34r: ....like lumpy fuel.....

when asked if my car had a management light i told them i havent seen this light up in the screen told the guy the year it is a 200l 19 tdi he told me there should be one on it, unless the bulb has failed or someone had disconnected it

:lol: ....whatever you do, don't press the red button!......

have agreed to get the car tested for more than half the price that frauds was going to charge me

:lol: how much more .....cheap at half the price guv....

 

this sounds like the start of a yet another bad american sitcom......

 

just because your glowplug lamp works and it starts doesnt mean all your glowplugs are working.

[smoggy7]

hi seatkid, ok we got new plugs today but the weather hasnt inproved but had a quick look can you tell me the best and easiest way to get at them as i think they are at the back of the engine cant see them at front, would this be a job from underneath the car to do these not much room fro the top end many thanks smoggy7

[seatkid]

I take it you went through the procedure I outlined and established that one or more of the glow plugs were faulty.........

 

to remind you ....+12v is supplied by a 60A fuse (F103) located in the battery junction box to a relay (K70) located in the central juction box. This relay is engerised at startup by the ecu and is protected by a 10A fuse F34 also in the central junction box.

 

The glow plugs are located in the cylinder head

 

2001 TDI - Glow Plugs...

 

to Remove

 

1. Disconnect the battery negative lead.

 

2. Detach the engine coolant hose from the engine cover

 

3. Remove the engine cover -i.e. remove the retaining screw covers then remove the retaining screws and lift off the cover.

 

4. Disconnect the glow plug wiring

 

5. Remove the glow plugs

 

to Install

 

5 Refit the components in the reverse order

[smoggy7]

hi,ok we have changed the glow plugs today will check now in the morning from cold to see if has cleared the fault will report back tomorrow with the news thanks

[smoggy7]

HI ALL, WELL WE CHECKED THE CAR THIS MORNING FROM COLD OVERNIGHT AND IT HAS STARTED GREAT AND AS FAR AS WE CAN TELL THE THUMPING HAS GONE SO I GUESS THE GLOW PLUGS WERE AT FAULT THERE, WILL KEEP AN EYE ON IT FOR THIS WEEK BUT I THINK IT MAY WELL HAVE BEEN THIS THANKS FOR ALL THE REPLYS AND SUGGESTIONS SMOGGY