[Mr.fixmyalero99]

Ok so here's my problem

I have a 99 old alero 3.4 6clyndr
When I start the car it's turns on fine and idles ok
When the driving begins is where the problem begins
The speedometer sometimes will stay stuck in 0mph
While I'm driving
After about a minute or so the needle on the speedometer begins to bounce up and down in between 0mph n how fast I'm actually going
From there this has only happened twice since the problem began on Thursday of last week the rpm will go up high and the car won't accelerate
But goes back to just the bouncing needle and Car doesn't run as smooth
I've done
Tune up
New alternator
New serpatine belt
New o2 sensors both of them
New air temp sensor
New maf sensor
New intake manifold with new gaskets
New egr system
New speed sensor
New catylictic converter
New fuel pump and filter
New air filter
New oil filter
Replaced coil packs
New cam shaft sensor....