Hello again,

For the last two years my 91 240 had been stalling when the
temperature was 92 degrees or higher. Yesterday the temperature
reached 75 and I began to feel the stalls coming on, but I
was close to home and limped home (about 3 blocks). This afternoon
again it was in the 70's and she began to stall out. I limped
home with my fingers crossed (about 5 blocks. Recently my main
fuel pump has been sounding different and louder than normal.

I jumped both fuel pumps and only the main comes on.
Fuse 4 and 6, #4 fuse removed, left side to left side ran main and
left of six to right of 4 and nothing happened. Sounds like the in-tank
pump needs to be replaced.

After the Hot Stall today the codes were 2-1-2, 2-3-2 and 2-1-2.

I applied heat sink to the ignition module last year with no positive results.
I also replaced the Engine Speed Sensor/Impulse Sensor last year.
The coil seems to be original, could this be my problem?
Could the oxygen sensor failure cause these hot stalls?
Maybe replace the ignition module?

When the temperature is lower she runs just fine and dandy.

Does the fuel pump relay control both fuel pumps?

First thing I will check will be the in-tank pump on Wed. morning.

Any and all advice is appreciated,

Joseph in the New Mexico

"Any and all advice is appreciated,..."

Fix the tank pump.
--
Art Benstein near Baltimore

"When you come to the fork in the road, take it."

Hi Art,
I hope all is going well with you and yours.

I decided to start working on the intank pump today
so I got everything ready and decided to jump the
pumps before taking it out and it ran fine. When I
jumped the intank pump last week during the hot stall
it would not run, but it worked today. I also swapped
the pump relay with a good one during the hot stalls
and that did not help.

Question: Can a bad oxygen sensor somehow cause the intank
pump to not function by sending or not sending a correct message?

Thanks,
Joseph in New Mexico

I think you are attributing way too much to the O2 sensor. The in-tank must run reliably and some are intermittent. Are you having more trouble below half tank, uptake hose maybe? Why has the AMM not been replaced (or has it?) to rule it out?

Yes, I thought so too, but I needed someone to confirm that with me.
I am going to replace the intank pump, I read up overnight and determined
that the intank pump can run intermittently, as you just confirmed.
Because of the sudden Snow Storm yesterday as well as my 10 day cold I have not been working on the car yet.
But, I will respond when the work is done or maybe during.

Thanks a bunch

I've had problems with the wires going into the sender/pump assembly breaking right at the point where they go into it. Have you inspected those? This could explain the intermittent nature of the pump problem.
--
1966 122s, 1968 142s, 1969 144s, 1979 245dl, 1989 244gl

This morning I replaced the intank pump with one that
I had pulled at the yard. It is an A/C Delco, made in UK.
It tested well before the install. The one that was in the
car was running intermittently and was generic/no name.
The car does now seems to have a smoother take off and the
main pump is quieter.
Now when the temp. climbs we will see the results. I will
post back with the verdict then.

Joseph in New Mexico

I had that problem a couple of years ago - which stumped me for quite a while. It turned out the vacuum line into the flame trap was blocked (completely) as well as starting to perish. So try cleaning the flame trap etc

I will remove, clean and replace the flametrap hoses.

Thanks for that advice.

I have not got around to working on the car yet.
Mother went into physical rehabilitation and I
have had a bad cold for five days now.

I do have priorities ...
1) Mom
2) Health
3) 240 Volvo
4) Kids

or do I have it wrong?

Joseph in New Mexico

Yes you have your priorities in the wrong order.

If you have your 240 in good health then your mind will be healthy enough to deal with the rest.

Moms talk to wives and vice verse so deal with them like the car.

The one that whines the most or will not make a sound when needed will get the most attention first. As the wiser married men have found out, silence from a woman, or from a car, since we give them a “she” reference, cannot be lived with for long with out there being some pain issued.

A kid at the bottom of the list is correct. They have to earn the right to be recognized where and when needed to help you get along with the other two!

(:) Maybe, I am a little off base since I had no kids and lived away from both Moms. My brother was the opposite than I, plus he has never owned any Volvo's! I think he has had more cars than I have invested in new pairs of shoes! It’s all about keeping some sanity or perspectives… I think it makes a difference as I am older and still have some hair.


Get better and be posted soon!
Phil

I believe you have answered your own question. Intank pump failure, main gets noisier. Sounds like you have isolated it that it is not running.
--
Post Back. That's whats makes this forum work.

Allekat,
Yes, that is true, but the car still runs well.
It begins to have issues when the outside temp.
goes up, then it starts stalling.

I will replace the in-tank pump after making sure
it is not working.

Then onto the oxygen sensor.

I will post back when these two repairs are done.

Thanks to all so far,
Joseph in New Mexico

I did swap out the fuel pump relay with another
used one (used) that I have as a backup, when I got home
after todays stalls, but the symptoms continued.

It could be a bad IAC or an air leak behind the AMM. A bad accordion hose can upset the balance of air. Engine movement tweaks it.

A dirty or maladjusted throttle plate does the same thing too.

Phil

Machine Man,
I replaced the Idle Air Control Valve a couple of years ago,
when this Hot Stalling began. I will check the accordian hose
for cracks/holes.

I will reply to post after checking the accordian hose, the
in-tank pump and the oxygen sensor in a couple of days.

Thanks,
Joseph in New Mexico

Test the O2 sensor, see FAQS. I had an O2 problem last yr in 1989 245, disconnected O2 in engine bay and it ran better. Good pluck.