- Joined
- Nov 13, 2018
- Messages
- 4,539
- Reaction score
- 4,503
- Points
- 113
- Location
- Canaan,NH
- Vehicle Year
- 1993
- Make / Model
- Ford Ranger
- Engine Type
- V8
- Engine Size
- 351
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
- Total Drop
- 3"
- Tire Size
- 235/55R16
- My credo
- If you don't have time to do it right will you have time to do it over?
That's not a heat riser, that's an exhaust temp heated choke. A heat riser was a butterfly in the exhaust manifold that was controlled by a bimetal spring that held it closed when cold and open when hot. If the heat riser stuck open- very rare- they intake warmed up slow and the vehicle ran like crap in cold weather. Stuck closed would cause lack of power, a whistling noise very likely, and often vapor lock- even before they polluted our gas with alcohol.Not sure about Rangers but my 2150 has a heat riser port (which is caped). I do have an electric choke (which I need to wire).
And, I had a '79 Fiesta with a Webber carb that would ice up to the point that it would quit running, on the expressway, but on local roads, it was OK.
These are heat risers: