Ok I have a 93sdv 81k and I been having lost of power. I been getting bad gas milage hard starts one stall and it will idle up and down and when it levels out the car takes longer to catch speed. I had the egr replaced 3 weeks later I'm having the same problem except for the stalls. When I first noticed the problem the although voltage was 13.80 after the new egr it went back up to 14.50 idling . Now I'm having these issues the voltage is off again. Could someone tell me what's going on and if it's egr how do I clean it and the tubes
Not sure if I am following your question(s) totally. But when you say the car stutters or loses power when leveling out you should check on your fuel pump/pressure. Can't think of much that would cause that loss other than fuel lines and mechanisms.
I'd check your grounds if your having a voltage issue along with the stalling but when the alternator is cold, it is normal for it to put out over 14 volts until it warms up. 15 or more will set a code. Check your codes first. Use a coat hanger or something similar to rod the carbon out of the tubes beneath the throttle blades.
before I started having issues with starting and performance it was at 14v then wen I did it was in the 13's the shop replaced my Egr and the voltage went back up now IM having problems again the voltage is Bck down. Its wired for a system but sadly the radio is still stock till I correct this issue and I can put my stereo in.
It's likely a fuel problem. Possibly the fuel pump is weak. You'll need a fuel pressure gauge to even begin testing the fuel system. The pressure should be between 34 and 38 psi with the engine one and 40 or more engine off. Unless the battery isnt charging or the car wont crank, then there is likely nothing wrong with the electrical system. It's spark or fuel.
No one asked and you never stated, any check engine light?
There is a schrader valve at the right-front end of the fuel rail. You will need to attach in a fuel pressure gauge here. Not sure of the exact spec for these cars, but most GM fuel injection runs at 35-45 psi. Someone will chime in with the correct spec.
FPR = fuel pressure regulator. It's the little cylinder attached to the fuel rail, underneath it, right next to the distributor. It has a vacuum line attached to it. If you remove the vacuum line and take a sniff, do you smell gas?