Login Register

Search found 18 matches

by 1990Volvo740
07 Sep 2024, 13:25
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Heat Soak
Replies: 2
Views: 194

Heat Soak

The problem has been solved.

It was a bad battery or defective Battery since it did start the car like a champ when the temperature was Hot.

When Cold it was hard to tell that battery failed.
by 1990Volvo740
05 Sep 2024, 18:50
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Heat Soak
Replies: 2
Views: 194

Heat Soak

I'm having a problem starting the car when the weather is hot.
Starts fine in cold weather but 95+ degrees, the car will not start. All the indicator lights illuminate but when I turn the key nothing.
What sensors could be bad that would fool the car into preventing it from starting?
by 1990Volvo740
31 Aug 2024, 14:35
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Vacuum Leak I think
Replies: 17
Views: 732

Vacuum Leak I think

Hello All.
I found the problem. It's starting as it should, with just a turn of the key again.

Thanks for all your help.
by 1990Volvo740
26 Aug 2024, 13:42
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: 89 740 GL Wagon instrument/speedometer/odometer need help
Replies: 4
Views: 969

89 740 GL Wagon instrument/speedometer/odometer need help

What were the tool sizes that you used for pulling the instrument cluster?
I have a 1990 aand want to do the same.
by 1990Volvo740
24 Aug 2024, 12:20
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Vacuum Leak I think
Replies: 17
Views: 732

Re: Vacuum Leak I think

The fuel pressure regulator is mounted on the front of the intake manifold. It has fuel connection and vacuum hose on the front. You can check the fuel pressure with a gauge teed into the fuel header to the fuel injectors. Should be about 43.5 PSI. The vacuum diaphragm can develop a leak. A test fo...
by 1990Volvo740
21 Aug 2024, 12:35
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Vacuum Leak I think
Replies: 17
Views: 732

Vacuum Leak I think

I might have another issue. The throttle plate faces down at a angle and though I tried to clean the plate, I was spraying blind. I may have a another issue as well. While turning the throttle by hand, with the car not running, the throttle sticks slightly at the 60 percent rotation point. Using sli...
by 1990Volvo740
20 Aug 2024, 12:30
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Vacuum Leak I think
Replies: 17
Views: 732

Vacuum Leak I think

The fuel pressure regulator is mounted on the front of the intake manifold. It has fuel connection and vacuum hose on the front. You can check the fuel pressure with a gauge teed into the fuel header to the fuel injectors. Should be about 43.5 PSI. The vacuum diaphragm can develop a leak. A test fo...
by 1990Volvo740
17 Aug 2024, 13:05
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Vacuum Leak I think
Replies: 17
Views: 732

Vacuum Leak I think

I reset the computer by leaving the negative off the terminal post for an hour at the car wash. Nothing changed but the Oil Pressure indicator light began flashing periodically. That might be the problem. I have no oil leaks under the car, a small one from the valve cover gasket but that should not ...
by 1990Volvo740
17 Aug 2024, 12:17
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Mixture
Replies: 3
Views: 316

Re: Mixture

It is the plastic knob in a plastic valve body on the front of the throttle body. If you plan to adjust it, mark it so you can return to the original setting if you find you have made things worse. You may just have a vacuum leak somewhere. Paper manuals for 240 (very similar to 740) Volvos used to...
by 1990Volvo740
16 Aug 2024, 18:08
Forum: 240, 740, 760, 780, Bertone, 940, 960, V90, S90
Topic: Color coding
Replies: 0
Views: 227

Color coding

What is the color of the wire that comes from the AC to the switch, see image attached, that in mounted in the radiator. I have no AC and wish to run a wire from the battery to one side of the switch to get it to turn on. What does the wire on the other side do and what is its color coding? Thanks F...