GTI cutting out, oil light flashes

[b4rks]

Julee, I haven't really got anything that will help you out, but I've been experiencing a very similar sort of thing (This ECU relay business in a royal pain in the ass)....

As my previous posts stated my Mk3 gti 8v was cutting out intermitantly, and after advice from this forum I bought a new ECu relay, and had no further problems up until about a week ago.

Then, the exact same thing happened again, driving along in 4th at about 45mph, and the old girl started judering, oil and water temperatures were both normal but it was a very hot day.  I've permanently removed the fuse board cover so I reached down (can now feel and replace the 30 relay without looking ) and it was so hot that it was painful to keep my finger on it.  Pulled over to the side of the road, and as I dipped the clutch it cut out.  I keep a spare 30 relay in the glove box now so swapped them over, turned the key and off she went again purring like a kitten..... The same thing has happened again since, the relay seems to give me about 40 - 45 minutes of driving time then overheats, swap it for a 'chilled' relay and all's good - so I'm now not getting stranded anywhere but it is annoying cutting out in traffic and having to swap it, looking like a turkey.

My idle valve is on the way out so I don't know if the two are connected in some way, but there's obviously some electrical malfunction somewhere that's causing the ECU relay to overheat.

Anyway, just thought I'd write down my findings incase anybody else can shed further light, or worst case just to let all you 30 relay dubbers out there know you're not alone.

Looking to upgrade to a VR6 in a couple of months cos my 8ver has lost my trust entirely, just hope these don't experience the same problem or i'll be flying out to VW HQ (wherever that is) and giving the first person that walks out the door a proper kicking.

B4.

[STOMMO]

    Give em a kick fer me also!!!! 

[mjoe]

99    [357-955-531]     Front Wipers
72    [191-955-529]     Rear Wipers
30    [165-906-381]     ECU
36    [3A0-951-307]     BUZZER
18    [191-937-503]     load reduction relay
Apparently this part number is not used anymore (PN now is :7m0951253A)
53    [141-951-253B]    Horn
21    [191-953-227A]    Indicators
167   [191-906-383C]    Fuel Pump
 
 
Relay position
 
[72][30][18][  ][21]
[99][36][  ][53][167]
|||||||||||||||||||||    <------ fuse panel

[b4rks]

mjoe,

is that the fuse board layout for a mk3 gti 8v as well???

In mine my ECU '30' relay is to the right of centre....... I wonder if that's why the problem is happeneing!!!!?

[N_GTI_96]

Hi,  This is one huge Thread, god bless the internet eh !!


So I've a 96 GTI 8V horse or a machine, I'm have this engine cut problem and I will fix it god dam it!

Firstly , I think there are two main "known" problems being talked about on this Thread.

A/      Engine cuts out a low revs or when idling

B/      Engine cuts at any rev, cuts out like it was shot, and the oil light comes on


Problem  A/

 is most likely a dirty Ttottle Body, and / or Breather pipe may be blocked with gunk and even frayed a bit.  There is a posting on this forum with a detailed description on how to carry out the cleaning, listed tools, diagrams included, it's a fantastic posting, I did the work on my car a few months ago, and it completly solved that problem. i.e. problem a/  ..
[I can't find this posting at the moment, but I'll put a link up if I do]



Problem B/

I'm having this issue at present, and I've begun the list of suggested fix's, I've already
 
              (i) Replace the ECU  Relay   no30 or my car PN: 165 906 381
                                   NO CHANGE TO THE ISSUE

              (ii) I've just replaced the fuel pump Relay no. 167 PN 191 906 383C
                                  WAITING TO SEE IF IT REPEATS

I will post an update soon, if the fuel pup relay is not the case then, I'll move onto the other suggestion posted.

Many thanks !!!!
N




 

[N_GTI_96]

hi again..

I've psted that TB cleaning instructions under

"how to clean the Trottle Body"


Thanks to who ever originall wrote it!!!!!!!!!!!!!

I hope this other engine cut problem will be solved also..

thansk again !!
N

[b4rks]

don't we all mate!! But i've now become so efficiant at changing the ecu relay that i can do it whilst driving (let the engine cut out, and while coasting swap em over then bump start the old girl!!)

But that still doesn't help out with why it's overheating in the first place......


Only got to last me till october then i'm upgrading to a mk2gti16v

Much better.

Good luck all

[SL56]

@ N_GTI_96


Any developments with the fuel pump relay yet m8?

[Damo74]

AAAAAAAARRRRRGGGGGGGHHHHHHHHHHHHHHH !
Mine's gone from cutting out momentarily a few months ago, to doing it regularly at random intervals. Tearing my bloody hair out. Had to wait around 40mins for it to 'fix' itslef last night. When it used to cut out i could turn the engine over but it wouldn't catch. Leave it 10mins and it would fire up. Changed the coil, Hall senser. worked fine for a while. But it's progressed to something new now. Cut out on me last night, Oil light came on, then when i tried to start up - absolutely nothing. No lights on the dash, no charge going to the starter, nothing. left it for a while (40mins), then - no problem.
I've swapped no. 30 relay, new fuel pump relay and was about about to replace the crank sensor (can you get to it without undoing the engine mount?) but figured it might be a problem with the immobilizer. That might explain why i can't even turn it over. Has anyone else had their immobilizer looked at? Can anyone stop me falling into this eternal pit of despair....please...

[Bazzer]

Just to add my 2 pennies, my beast was running oddly this morning. I noticed when I started it up it wouldn't idle. But I could restart straight away, if I kept the throttle pressed a bit. Every time I let off though, it was stalling. At junctions etc...
After 5 mins, the car was warm enough to idle very low (850rpm) so I tested the aircon - normally, when it's switched on the revs rise a bit, this time they went down a bit. Seems like the car's 'anti stalling' thing isn't working.
So after reading this here, I'll see if I can get a #30 relay and clean the TB out. But I do have to say I don't feel like it's a TB issue, as it's started doing it for the first time. Not gradual - it was fine yesterday...