Driving down the road there was a gatso van (speed detection van) with its camra facing my car I had my snooper cobra iradar connected this particular detector is fitted outside the car behind the front grill but it's not absurd I made sure of that and it still did not alert me why is this?

Speedometer
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the body control module (BCM). The engine control module (ECM) calculates the vehicle speed based on the controller area network (CAN) serial data message indicating the wheel reference speed from the electronic brake control module (EBCM). The ECM sends a CAN serial data message to the BCM indicating the vehicle speed. The BCM sends a class 2 message to the IPC indicating the vehicle speed.
The speedometer defaults to 0 km/h (0 mph) when any of the following occur:
• The EBCM detects a malfunction in the vehicle speed sensor circuit.
• The ECM detects a loss of CAN communications with the EBCM.
• The BCM detects a loss of CAN communications with the ECM.
• The IPC detects a loss of class 2 communications with the BCM.

Having the vehicle scanned for codes would probably point you in a correct diagnostic direction .

The hard part was that you found this site to ask the question.
If you searched the internet for your product, you will easily find the manufacturers website
Product registration is in there.

https://www.cobra.com/support/product-registration

I would say it could. Especially for in town driving. It would help with the "searching for the right gear" that sometimes occurs at less than highway/open road speeds.

Also for any towing or heavier loads I would recommend NOT using overdrive.

For open road/highway I would use overdrive to get better MPGs.

Hope this helps.

Your phone might not be compatible with it.

Check the fuel pressure

Is there a shimmy at all speeds or just a particular speeds? First thing would check are tires to make sure a tire did not separate on you.Look for large bulges in the tread of the tire as well as any deformation of the tire, steel belts showing on the edges of the tire. Please feel free to respond so we can help resolve your issue.

Check engine light? I would check the EGR valve and PDFE senor to make sure its not stuck open since this controls idle speed. If it is stuck slightly open car will rev then stall motor does not know idle speed when open. Valve should be closed only time it opens is when your driving down the road.

EGR Valve is sticking and the dpfe sensor might be bad. Both control idle speed.

First I need to ask is it a 4 speed or a 3 speed transmission. If it's a 4 speed when driving down the road pull it from drive to third gear. You shpuld hear the engine speed up if it does not then that means you have on 4th gear and you will have to take it to a transmission shop. If it's a 3 speed then just count the shift points if all 3 gears are present then drive down the road and see if the van goes into tcc. When you mean the rpms are high how high are they.

DID YOU CHECK THE FUEL PRESSURE WITH A FUEL PRESSURE GUAGE, AND MAKE SURE IT IS WITHIN SPECS? IF SO THEN IT COULD BE YOUR IGNITION SWITCH...THE PROBLEM IS, TO DIAGNOSE IT IF IT IS THE IGNITION SWITCH, THE VAN MUST BE IN THE "NO START, OR NO RUN" STATE AT THE TIME....

PLEASE RATE THIS,
ROB...