K- series problems- won’t run..

[Dannyboy]

following Matts spin at Rockingham the car was running incredibly roughly. I aborted my final run and bought the car home.

k-series 1800 supersport-EU1- stepper motor TB so very early car. 

at home the symptoms were:
would start but wouldn’t idle
it was running incredibly rich - I couldn’t be in the garage with it running
plugs sooty.

To start checking the fault i’ve Gone through the following

i’ve started With CAM timing- set that to 150thou inlet, 125 exhaust as per DVA’s recommendation.
 Checked compression- all roughly the same.
changed the TB for a spare and cleaned the old one.
removed injectors
checked wiring continuity on all wiring / sensors back to the ECU - only the inlet vacuum (green plug) didn’t give me continuity- I will address that. 
Put in more fuel
checked fuel pump primes, checked injectors all operate with engine turning over.

starting- with starter cables attached to my road car- ensuring decent voltage

the car starts, but won’t rev and dies after 5-10 seconds. 

I’ve tried swapping TB’s back.

Anyone have any ideas on what to check next? I’m more than a little stuck. 

Dan 

[Jonathan Kay]

Did it get drowned at any point?

Have the plug leads been disconnected and reconnected?

starting- with starter cables attached to my road car- ensuring decent voltage

the car starts, but won’t rev and dies after 5-10 seconds. 

What's the battery voltage in that period? / Was that with the jump leads still attached?

Jonathan

[Dannyboy]

Jump leads still attached. 

Havent had time to check voltage.. revs rise then die as you open throttle 

[revilla]

When it does run, is it firing on all cylinders (do all the exhaust primaries get similarly hot after a few seconds) and does it soot up all the plugs similarly?

[p.mole1]

I would check the Lambda sensor, and the water temperature sensor for the ECU,make sure it is giving the correct resistance.

[grumpy the 7th]

Is your throttle air intake wet, dirty, blocked?

I've had a thoroughly wet foam filter that caused the same symptoms. Just like having the choke fully out on an old car.

 

[Englishmaninwales]

Danny,

Tried swapping the ECU ? - I can send you my EU1 spare if you need one.

Malcolm

edit to add I guess you have checked the vacuum from TB to ECU and the flame trap?

[SM25T]

Reread your original post ... too early for lambda sensor. Suggestion deleted.

[Nick Chan]

Throttle pot sensor?  Had one go when I refuelled R500 during a quick run and it was running perfectly up to that point.  Limped home with similar symptoms as described and tested another one and miraculously fine.

[Dannyboy]

Makcolm

not checked or changed ECU, I don’t have a spare. If you could send yours it would be a great help. 

I’ve ordered new sensors for TPS, Crank, ECU, water temp, spark plugs and new leads. 

I’ll re- check cam timing again (1.5mm inlet, 1.25mm exhaust) at TDC ( I don’t have an imperial dial gauge) reset everything and see how it goes when the parts arrive. 

Battery is on trickle charge.

 

From there.. who knows 

[Englishmaninwales]

Dan, you have a PM for your address.

I recall 2 occasions with difficult running, one was a dead TPS and the other responded to cleaning and lubricating the gears in the TB stepper motor drive. 

Malcolm