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Author Topic: what makes a KR 16V engine rev on start up?  (Read 2187 times)

Offline Deefadog

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what makes a KR 16V engine rev on start up?
« 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 :(
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Offline Veedub1989

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Re: what makes a KR 16V engine rev on start up?
« Reply #1 on: 20 January 2006, 14:04 »
the bentley manual suggests cold start valve problems  :wink:
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Offline Deefadog

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Re: what makes a KR 16V engine rev on start up?
« Reply #2 on: 20 January 2006, 14:21 »
Do you mean the 5th injector?
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Offline shaft69

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Re: what makes a KR 16V engine rev on start up?
« Reply #3 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.
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MK4 1.8t bored/stroked 2.0lt AEG crank, 83mm supertech pistons, intergrated rods, ACL race brgs, Flowed large port head, Supertech valves, All ARP bolts, GTX2871r turbo, Tial wastegate, 3" pipewerx dp, REVO stage 3 tune, Direct port water meth, MORE TO COME!!! Ready to go racing
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Offline Deefadog

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Re: what makes a KR 16V engine rev on start up?
« Reply #4 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
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Offline shaft69

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Re: what makes a KR 16V engine rev on start up?
« Reply #5 on: 21 January 2006, 11:34 »
Check the 5th inj again then and if poss try a ecu.
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MK4 1.8t bored/stroked 2.0lt AEG crank, 83mm supertech pistons, intergrated rods, ACL race brgs, Flowed large port head, Supertech valves, All ARP bolts, GTX2871r turbo, Tial wastegate, 3" pipewerx dp, REVO stage 3 tune, Direct port water meth, MORE TO COME!!! Ready to go racing
Owner of bndynamix ltd. BMW and mini specialist
184 Wallgate, Wigan
WN3 4AL
07966492823.

Offline Deefadog

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Re: what makes a KR 16V engine rev on start up?
« Reply #6 on: 21 January 2006, 14:22 »
Thanks, yeah i was thinking another ecu, just to rule this one out!

Anyone got a spare? LoL
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Offline Deefadog

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Re: what makes a KR 16V engine rev on start up?
« Reply #7 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?
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Offline Deefadog

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Re: what makes a KR 16V engine rev on start up?
« Reply #8 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
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Judderi

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Re: what makes a KR 16V engine rev on start up?
« Reply #9 on: 23 January 2006, 14:16 »
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