okay guys, i got me 2 more gauges, a tach and a fuel pressure. well my fuel pressure bounces like crazy from 2lbs-9lbs. and thats at idle to 3200rpms. i still got the stock lift pump. and my tach, which i had the plug under my dash to hook it up too, will not read untill 2500rpms, anything under that it doesnt move, so what is wrong with my new gauges???

 

You need a snubber (small orifice or mostly-closed valve) between the gauge and the fuel source.

 

No.The supply from the lift pump is constant and regulated.the regulator acts as a snubber giving a smooth reading ,or it should.Air will cause this bouncing.Reprime your fuel system and i bet it goes away.

 

Not in a stock setting. Or did I miss something?

 

This...

 

okaay i will build a dampener if you will for it tomorrow, and btw, it an electrical ev2 isspro. and my tack trys to work every now and then and when it starts, it jumps up like it should but it just fall back to zero... im lost on the tach

 

tach could be a pcm issue, or it could be the sensor on the front harmonic balancer or whatever, check the gap on that.. it's on the front pass side of the crank, clean that all up may fix it.

 

Bet it's that stinkin crank sensor bouncing around. Mine did it once.

 

hes got a stock lift pump.The pressure reading should be smooth.

 

well i built a snubber i went from 1/8 to a piece of 3/4 pipe about 1.5 inches long back to 1/8 and that helped alot. it still bounces some, but better . and im thinking my tach gauge is bad. i cleaned the harmonic balancer and tach sensor. it didnt help one bit. so i talket to isspro and they said to send it back and they will test it.