1994 Volvo 940 Q&A

1994 Volvo 940 Question: wont go over 40 mph & doesnt seem to shift od light on when od isnt

also have heard some hissing noise as well, what is this caused by??? Thank you for your time -
Answer 1
It sounds like you have a few issues going on here. 1. Won't go over 40 mph. There are several possibilities, could be a failing fuel pump, mass airflow sensor or fuel pressure regulator, or something else. Need a proper diagnosis to determine what is causing this. 2. OD Light: Most likely the OD relay is failing, very common issue on the 940. 3. Hissing noise: noises need to be heard and an inspection performed to determine where it is coming from, otherwise it's a very wild peculation, and will always be wrong. An experienced Volvo tech can figure these things out fairly easily, as these are fairly common complaints for this vehicle. -
Comment 1
Hissing noise, any problems with the cat. on these models? -
Comment 2
No, the catalytic converters didn't have many issues at all. -
Answer 2
i have just had those same symptoms, i replaced my transmission filter first actually i seen shavings on the filter but i replaced it anyway it helped but i had to replace the trans -