When I started my car after a week it started and sounded like it was gonna die it was idling at about 500 rpm an lower. When it warmed up it seemed ok but then the rpm started bouncing from 1100 to 500 and lower sounding like it was gonna die. When I reved the car up a little it bogged like crazy and rpm would barley move up at first. The motor is a filly built 2 litre that's boosted running on Neptune never had an issue before at all till I started it today. Any ideas on what I can check also the spedo bounced all over to any help would be appreciated thanks

 

Check for loose wires or corrosion at your Vss plug, that will cause your speedo to jump like hell.

What does your wideband read when it bogs?

What have you checked or tested?

 

Its reading 10.0 and I haven't checked or tested anything

 

10.0 is way too rich!

 

So what u think get a re tune?