Cutting out getting worse

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Cutting out getting worse; Time to get it sorted
Topic Started: Sun Nov 1, 2009 12:18 pm (376 Views)
Snake	Sun Nov 1, 2009 12:18 pm Post #1
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	Like most 16v owners the dreaded cold start issue has reared its ugly head again, the car starts first turn of the key and idles perfectly but when you take off she runs fine until the first junction you come to and as soon as you slow down and push the clutch in the revs drop to zero and she just dies, this will happen for the first 5 mins or so but as i live in an estate its a bit of a problem with so many junctions before i hit the main road. So i will be leaving it in when i get the time to the guy Michael uses and get it sorted once and for all as when she has been out for 10mins she drives like a dream and the problem is'nt there any more...



RobertE	Sun Nov 1, 2009 12:39 pm Post #2
Serial victim... Posts: 6,880 Group: Members Member #1,403 Joined: June 13, 2007	I suspect that the little square microswitch at the end of the throttle cable needs adjusting/replacing. Dirt can get in under the roller pivot and stop it working. Is there a slight stutter on acceleration? I'm looking at one now: A 002 545 68 14 About �16...



Jay	Sun Nov 1, 2009 12:42 pm Post #3
Member Posts: 288 Group: Members Member #278 Joined: May 6, 2006	RobertE Sun Nov 1, 2009 12:39 pm I suspect that the little square microswitch at the end of the throttle cable needs adjusting/replacing. Dirt can get in under the roller pivot and stop it working. Is there a slight stutter on acceleration? I'm looking at one now: A 002 545 68 14 About �16... Dont mean to highjack thread but what is the actual purpose of the microswitch?



Snake	Sun Nov 1, 2009 12:43 pm Post #4
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	RobertE Sun Nov 1, 2009 12:39 pm I suspect that the little square microswitch at the end of the throttle cable needs adjusting/replacing. Dirt can get in under the roller pivot and stop it working. Is there a slight stutter on acceleration? I'm looking at one now: A 002 545 68 14 About �16... Yes there is sometimes Robert,i adjusted the switch before and it seemed to help but given the age of the car the contacts inside could be worn so its worth a try for that price before i start spending out on specialist mechanics.



balamb37	Sun Nov 1, 2009 12:53 pm Post #5
Member Posts: 569 Group: Members Member #3,881 Joined: February 25, 2009	I think I would check the 'Cold Start Valve' could be blocked or not functioning correctly.



Snake	Sun Nov 1, 2009 12:56 pm Post #6
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	balamb37 Sun Nov 1, 2009 12:53 pm I think I would check the 'Cold Start Valve' could be blocked or not functioning correctly. So how do i do that, being about as use as a chocolate teapot when it comes to anything other than the most simple things under the bonnet, the micro sw is no problem because its in front of you...



cossie connoisseur	Sun Nov 1, 2009 2:08 pm Post #7
fat tits Posts: 9,674 Group: Members Member #110 Joined: December 18, 2005	best to replace, they can go tits internally and for �16 its not worth the agro!



Marv	Sun Nov 1, 2009 4:19 pm Post #8
Evo II Wheel Posts: 2,671 Group: Members Member #642 Joined: November 3, 2006	�16 they come down a little. I bought one in April when i got my 16v and they were �23 i think then. Could be a faulty throttle body or Vacum leak aswell. Mine was cutting out everytime i stopped or lifted off at low speed. Turned out the throttle body was the main fault, the ones on the 2.5's are alot more likley to go than the 2.3's as they changed the design slightley. Mine also had a vucum leak underneath the Fuel Dizzy the main pipe had split.



mazza	Sun Nov 1, 2009 4:25 pm Post #9
Member Posts: 620 Group: Members Member #151 Joined: January 24, 2006	Snake Sun Nov 1, 2009 12:56 pm balamb37 Sun Nov 1, 2009 12:53 pm I think I would check the 'Cold Start Valve' could be blocked or not functioning correctly. So how do i do that, being about as use as a chocolate teapot when it comes to anything other than the most simple things under the bonnet, the micro sw is no problem because its in front of you... Hi folks I dont think its the "cold start valve" as the engine fires up with no problems. I still reckon its the micro switch. mazza



Snake	Sun Nov 1, 2009 5:17 pm Post #10
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	Iv'e sent a request to my local MB dealer through their parts query on their web site but if anybody has a micro switch going begging i would buy it..



balamb37	Sun Nov 1, 2009 5:29 pm Post #11
Member Posts: 569 Group: Members Member #3,881 Joined: February 25, 2009	@ Mazza, you mean the same as Robert ? that is the 'Idling Switch' and Snake says it idles Ok. So I still reckon the cold start valve is restricted, as it wouldn't neccesarily stop it starting on the first go, but if restricted it would give intermittant running as long as the engine is cold, but it could be a number of things including the OVPR. @Snake the CSV on mine is just on the front of the inlet manifold with a blue plug on it.



RobertE	Sun Nov 1, 2009 5:30 pm Post #12
Serial victim... Posts: 6,880 Group: Members Member #1,403 Joined: June 13, 2007	According to the label on the little plastic scrotum in which this one arrived, they have over 100 at Milton Keynes...



MICHAEL	Sun Nov 1, 2009 5:44 pm Post #13
Member Posts: 5,633 Group: Members Member #555 Joined: September 28, 2006	Snake, it's not easy to identify that sort of fault. Better taking it to your local man or Merc-Tech and save yourself the hassle. Michael



Snake	Sun Nov 1, 2009 6:31 pm Post #14
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	Hopefully it will be the micro switch because thats an easy fix, Michael i have heard that the guy in merc-tech can get the arm in up to the shoulder so i'm a bit hesitant in going near him.



MICHAEL	Sun Nov 1, 2009 6:35 pm Post #15
Member Posts: 5,633 Group: Members Member #555 Joined: September 28, 2006	Snake Sun Nov 1, 2009 6:31 pm Hopefully it will be the micro switch because thats an easy fix, Michael i have heard that the guy in merc-tech can get the arm in up to the shoulder so i'm a bit hesitant in going near him. I don't think so, could be a garage, not so far away though.



Snake	Sun Nov 1, 2009 6:49 pm Post #16
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	It was a couple of the guys at the last get together mentioned Philip tended to charge the earth for the labour costs.



MICHAEL	Sun Nov 1, 2009 6:56 pm Post #17
Member Posts: 5,633 Group: Members Member #555 Joined: September 28, 2006	Snake Sun Nov 1, 2009 6:49 pm It was a couple of the guys at the last get together mentioned Philip tended to charge the earth for the labour costs. I think I know who they are and neither drives a 2.5-16.



Snake	Sun Nov 1, 2009 9:03 pm Post #18
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	MICHAEL Sun Nov 1, 2009 6:56 pm Snake Sun Nov 1, 2009 6:49 pm It was a couple of the guys at the last get together mentioned Philip tended to charge the earth for the labour costs. I think I know who they are and neither drives a 2.5-16. So what is his labour charge..



cossie connoisseur	Sun Nov 1, 2009 10:48 pm Post #19
fat tits Posts: 9,674 Group: Members Member #110 Joined: December 18, 2005	change the switch bud, its a 2 minuite job from coming in the post and being on your car. if that dont work then you go from there....no point wasting money on a diagosis of a problem that dont need diagnosing lol



Snake	Sun Nov 1, 2009 11:04 pm Post #20
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	cossie connoisseur Sun Nov 1, 2009 10:48 pm change the switch bud, its a 2 minuite job from coming in the post and being on your car. if that dont work then you go from there....no point wasting money on a diagosis of a problem that dont need diagnosing lol Thanks Nick thats the plan,i have the parts request with MB Belfast and its an easy job and as you say i'll take it from there, i'm in no hurry so that car can sit as long as it takes but i would love it to run well enough to use as my daily..



stwat	Sun Nov 1, 2009 11:13 pm Post #21
Moderator Posts: 12,434 Group: Moderator Member #28 Joined: November 11, 2005	Have you checked whether your throttle is adjusted correctly and clicking the switch when you lift off?



jeremy	Mon Nov 2, 2009 7:28 am Post #22
Member Posts: 6,575 Group: Members Member #2,018 Joined: December 9, 2007	I've got a similar problem to this one on my 2.5-16V , if , when on a long journey there is always a point on it when the revs drop completely , and it wont even tick-over , but just as suddenly the problem goes away again , not to return on that particular journey .....go figure ? Jeremy



cossie connoisseur	Mon Nov 2, 2009 7:43 am Post #23
fat tits Posts: 9,674 Group: Members Member #110 Joined: December 18, 2005	its a sensitive switch anyway let alone after 20 years, the new ones are slightly different desing and better built too! if it dont click when you put ur foot on the throttle it will never kick in



mazza	Mon Nov 2, 2009 7:43 am Post #24
Member Posts: 620 Group: Members Member #151 Joined: January 24, 2006	balamb37 Sun Nov 1, 2009 5:29 pm @ Mazza, you mean the same as Robert ? that is the 'Idling Switch' and Snake says it idles Ok. So I still reckon the cold start valve is restricted, as it wouldn't neccesarily stop it starting on the first go, but if restricted it would give intermittant running as long as the engine is cold, but it could be a number of things including the OVPR. @Snake the CSV on mine is just on the front of the inlet manifold with a blue plug on it. Morning! I mean the same as Robert! its the "micro switch" it has 2 functions, tell the ecu when the throttle is open and tells the ecu when the throttle is shut so that injection goes to idle mode. mazza



Snake	Mon Nov 2, 2009 9:21 am Post #25
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	stwat Sun Nov 1, 2009 11:13 pm Have you checked whether your throttle is adjusted correctly and clicking the switch when you lift off? Yes i checked it but thats not to say the contacts inside the unit are good after this length of time..



Snake	Wed Nov 4, 2009 5:53 pm Post #26
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	New micro switch ordered from MB Belfast �19.40 + vat and they are posting out to me so i should have it for the weekend..



Marv	Wed Nov 4, 2009 6:06 pm Post #27
Evo II Wheel Posts: 2,671 Group: Members Member #642 Joined: November 3, 2006	Happy days, hopefully it will cure it.



Snake	Wed Nov 4, 2009 6:47 pm Post #28
Old free and tattooed Posts: 6,542 Group: Members Member #5 Joined: November 2, 2005	Marv Wed Nov 4, 2009 6:06 pm Happy days, hopefully it will cure it. I hope so Marv and i'll check the obvious while i'm fitting it , i love the car but need it to be more reliable at this time of year before i would consider it as my daily cos when its warmed up its a brilliant car to drive..



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