145E running problem - FIXED

Rob

So I have a 145E here that I am trying to get to run properly, Apparently it was running fine until about 12 months ago when it was parked up. I have attempted to start it by simply hooking up a set of jumper leads and hitting the key, after a fair bit of cranking it fired up.. on 3 cylinders. It ran roughly for about 5 minutes and stopped. It would not restart. I let it cool down for about an hour and hit the key, off it went again for another 5 minutes and stopped. Once again it would not restart.

The fuel gauge read empty, so I added 25L of fresh fuel. By now it had been sitting for a couple of hours so when I hit the key 3 cylinders fired up as usual, I pulled the lead to cylinder 1, no difference. I Shut it down, replaced the spark plug and hit the key again.. This time all 4 cylinders were pulling their weight. It was running nice and smooth for 5 minutes or so and then it stopped again and wouldn't restart.

I have found that i can do this over and over and over and it doesn't change, by now I am certain it is running on its fresh fuel... and all 4 cylinders are working evenly.

To add to this. If, after it has shut itself off, I crank the engine for a long time with NO throttle applied it will start and idle (a little roughly). It will only run in this state for 30 seconds or so and if the throttle is touched during this time it will stall.

Of course If I leave it alone for an hour It will start again no problems.

I have had little to no experience on these K-jet systems... any tips.

volvodriverman

Is it kjet or djet?

Rob

it is k-jet.

egads (she/her)

Kjet? Might be the injector as the cold start injector runs for ~5 mins after cold start.

Rob

Yes.... I thought all 145E's would have D'jet. But this is clearly not D-jet.

I cannot even find another B20 on the internet with K-jet.

Rob

It appears kjet is unique to the '74

egads (she/her)

Later 74 cars were kjet but I thought this would be early year. Anyhoo, injectors flowing? Pull and tape it to a plastic bottle then start and run and see how it goes. I will see if 240 kjet injectors are compatible and if so, nick some and send them up.

egads (she/her)

@volvohordz has a bunch of kjet experience if memory serves.

egads (she/her)

W00t, 74 is on kjet.forg, reading up now.

http://www.k-jet.org/documents/greenbooks/100-series/?browse=1974+Service+Manual

egads (she/her)

Is it the front cylinder? Cold start flows most down there from the look of the manifold shown in the green book.

egads (she/her)

Ooh, if it is unplug power from cold start and see how it goes.

Rob

:D i will do some experimenting tomorrow...

egads (she/her)

74 is the year I am missing on paper so really happy it is on kjet.org too.

Nosi

hi
I am new here and will post a bit of info later.
however. I have recently had the please of learning about Volvos with Kjet, that have been parked for a while.
can I suggest you start with the fuel pump relay ( bypass it ) and secondly try replacing the coil.
both of these can overheat whilst the car is running, and then cool down enough for a restart.
I would not worry about the cold start injector ( effectively an electric choke), as it is clearly working ok, if you can start the car cold. ( it only runs whilst the starter is turning)
hope that helps.

egads (she/her)

Cold start runs til engine is at 35c on these and has a flow that would hit the first 2 cylinders more as the djet intake was adapted to kjet.
Could be the lead or dist points/cap though, good call.
Perhaps 1 of the fuel pumps overheats and turns off?

Nosi

Sorry if I misinformed. And I would hate to be a nuisance on my first post.
However the way I read the wiring diagrams is that the power to the cold start injector is supplied by the starter, and amount of time only is controlled by the thermal time switch. Hence this separate injector acts like a 'choke', which can only ever supply fuel whilst the starter is engaged. If your car is running for more than a few seconds after the starter is disengaged, then I would personally look at something other than the cold start injector. My bet is on the coil, given the symptoms described, and without further info. all the best with it. Regards Nosi

egads (she/her)

I suck at wiring diagrams, makes sense.

Rob

SORTED..

fuel pump was F'd

Replaced with second hand jobbie. All is good.

Rob

@egads

We have 4 cylinders that work,
We have an engine that doesn't stall
We have 3 forward gears and 1 backwards gear
We have headlights, indicators, brake lights and wipers.
I have checked underneath and the suspension/steering seems to be serviceable
We have 4 tyres that hold air and don't have steel hanging out of them.

I even gave it a bath.

It is ready to go.

egads (she/her)

Yay, tops! You sir, are a legend!