1991 Volvo 740 "idle speed" Questions

idle speed is controlled by an Engine Control Module (ECM). It needs to be put on a computor to be checked. The idle air valve provides the control for constant idle speed. In order to set the correct

...idle speed. In order to set the correct air valve opening to achieve constant idle speed, the fuel injection control unit uses information from the air mass meter, throttle valve switch and the ...

the idle on my 91 740 went down to 500 rpm and it now stalls at times HAVE IDLE SPEED CHECKED AND ADJUSTED.IT SUPPOSE TO BE 750 TO 775 RPMS.

1991 volvo turbo idles fine runs ok but the exhaust manifold gets glowing hot after highway speeds. help please stop driving you will ruin your motor.the problem you are having is a vacum leak. and ...

...Idle speed is consistent at 800 or 900 rpm. Is there another relay that could be causing this; it feels characteristically electrical in nature.Suggestions? I'v had that same issue. It turned out the ...

...speed up slowly I can go to 70-80 but if I push too much gas it will drop off to idle and I must turn off the key and turn on again and it is good to go Check your crank sensor. The symptoms you ...

...idle speed. When it fails open, too much air gets in, forcing the system to richen the mixture ratio. When it fails closed, not enough air gets in causing you to make up the difference by stepping on ...

...idle. And so 2 weeks go by car's doing fine then it happened again but this time it didn't just cut off. It just wouldn't really go, I mean I had the pedal to the floor and it was going ...

car sometimes wont start;sometimes cuts off while idling;sometimes cuts off while riding at normal speed. observations:when attempting to start for the first time of the day ive noticed that the fuel ...

1991 volvo turbo idles and runs ok exhaust manifold gets glowing hot after highway speeds checked and repaired all vacuum leaks had replaced air mass unit before this happened. timing by the book 12 ...