Hi,

What’s up with the new thread now? The other one was last week.
Art put a graph chart in the other thread.
No pulling the intake allowed, that’s cheating! (:)
No really, the ECU connector is more comfortable and back probing the wire back out to the sensor checks for more possibilities.

I would say it should run very rich “if not connected up” to the fuel management system.
They can failed in a “high resistance mode” which is almost the same as it’s thinks it’s in Alaska.
If there were any “shorted wires in the connection” or in “the component to read an almost zero ohms,” it would run very lean.
This would make hard to start when cold for the lack of a longer pluse enrichment cycle across all the injectors.

I’m not sure if your car has a cold start injector and how or when it got used on other earlier LH’s.
Something triggered it to turn on in other make cars. In fact, in Minnesota it’s a problem that it floods a cars engine, so consequently, owners disconnect them in the coldest part of winter!
Nothing vaporizes well, in long intake runners, even with block heaters.
Starting Either for engines and deicer for windshields, if their critter of an automobile, is outside!

As ECTs heat up from warming coolant, the resistance drops and the ECU has a program that fits the warmup cycle that includes the AMM input.
So, for the most part, it’s going to start and warmup.
The ECU always has a limp home mode, even if your AMM gets removed, but the drive will not be nice! That limp mode is subject to interpretation! It’s more like a very crippled mode and it wants you out of the car as soon as possible.

In order to get an engine to burn something like air and fuel, you need the third part of that triangle of fire! That heat from a spark or in diesels heat of compression!
A dead engine is the lack of one or more! No adjustment of coolant temperature will put those three into place.
Check ignition first! It’s a hundred year old system that still fails the most because it seems to simple to fail. Hardly any moving parts! Wrong!

The real old ones are valves and piston compression in the cycle of age. It has almost as many failures but people usually catch on to what they can see and hear.
What hits home here is timing!

The newest monkey to play with humans and their internal combustion engines, is the introduction to fuel or the management of it. Actually, because it’s so new, it’s failure rate is the lowest!

So, if you are hunting in the woooods ... go try the other older trees first!

Get your self a can of starting fluid, bypass the fuel system and check for the other two to see if the other sides of the triangle are joining up!
There have been posts recently on this very thing!
Art provided a nice picture of how he does it!
https://www.brickboard.com/RWD/volvo/1660584/220/240/260/280/unusual_start_issue.html

Phil