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Model specific boards => Golf mk2 => Topic started by: Deefadog on 20 January 2006, 13:04

Title: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 20 January 2006, 13:04

Got a strange cold start problem, everything has been tested and replaced, head sensors, WUR, Accumulator, fuel relay & pump, leads, plugs,alternator,battery,injectors etc - mixture and fuel pressures are spot on!

Basically from cold it will struggle to start ( it will turn over fine), once started it will rev at around 100 rpm, i hit the accelerator and it idles fine, i can turn her off staright away and re-start and she starts on the button (nothing has had a chance to warm up), no problems! i can tuen of and on all day, she starts fine, leave over night or all day and the same thing happens

Any ideas? I am at a loss :(

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Veedub1989 on 20 January 2006, 14:04

the bentley manual suggests cold start valve problems  :wink:

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 20 January 2006, 14:21

Do you mean the 5th injector?

Title: Re: what makes a KR 16V engine rev on start up?
Post by: shaft69 on 20 January 2006, 22:22

Did your inj get checked or were they replaced? If they weren't changed i would poss go for them. Has similar prob with my 16v. had them fully checked at camco held pressure to 4bar. But lad at my work said they leak of when turning over causing hard start. How i checked tried to start first thing in morning as soon as started turned off car and pulled out all inj they were wet (leaking off) Will run sh!te when started as it has then over fuelled. I replaced all inj sorted.

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 21 January 2006, 09:34

The injectors are new, i have checked them and they are fine!

I am going to check the 5th injector again! - to be sure

Title: Re: what makes a KR 16V engine rev on start up?
Post by: shaft69 on 21 January 2006, 11:34

Check the 5th inj again then and if poss try a ecu.

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 21 January 2006, 14:22

Thanks, yeah i was thinking another ecu, just to rule this one out!

Anyone got a spare? LoL

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 21 January 2006, 17:38

Getting somewhere! the 5th injectors is not firing at all (that explains alot).

Now, how do i rule out a faulty injector or is it the elctircs or thermotimeswitch?

On cranking i get 3.4V, once she starts there is no voltage!

Any ideas?

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 23 January 2006, 13:02

Bump :)

Getting somewhere! the 5th injectors is not firing at all (that explains alot).

Now, how do i rule out a faulty injector or is it the elctircs or thermotimeswitch?

On cranking i get 3.4V, once she starts there is no voltage!

Also - Can someone please tell me if the black wire on the cold start valve is an earth? if so i have checked continuity between this and the earth on the battery! and there is none. Should it be a constant earth or is it switched earth of some kind?

Just trying to figure out if the wire has broken somewhere

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Judderi on 23 January 2006, 14:16

These pages may help.

http://www.auto-solve.com/mech_inj.htm

http://www.users.bigpond.com/INTERJECT/KJETRON.HTM#RPM%20LOSS%20ON%20HIGH

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 23 January 2006, 14:34

Thanks mate, good stuff, but not what i need to know :)

Which i had another Valver to test these things out on LoL

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Judderi on 23 January 2006, 14:55

Sorry i though it was a valver for some reason.

Title: Re: what makes a KR 16V engine rev on start up?
Post by: Deefadog on 23 January 2006, 15:34

It is a Valver :) i just which i had 2 of them LoL