My rs DA9 has been acting weird while im driving it the tach wobbles and some times in the higher rpm range the engine seems to bog down and almost want to stall any one have any idea what this could be caused by?
I also rebuilt the top end of my motor could anything there be causing my problems thx

when you mean "rebuilt" what do u mean? explain?

when i first baught the car i noticed alot of oil deposits as well as exhaust the DC spotrs ceramic header that was on there had a leak in it so i removed that and i decided to do the head gasket as well to make sure it was not leaking and i used arp head studs other then a cam seal a new timing belt some plugs and the intake and exhaust gaskets and a new 2 1/4" exhaust with new header thats all i touched i did not take apart any of the valves

what are u revving it too...the tach could be wobbling just cuz its old

4500-5000 max
but while im driving at a steady rpm the tach drops from 2500 up to 4000 and seems to bog down

and your not throwing a CEL? could be a bad dizzy or somewhere in the ignition system possibly... pull your plugs and see what they look like? does the car smoke at all?

what do you mean by throwing a cel or a bad dizzy?
it does smoke a bit.

CEL = check engine light if your not throwing a CEL then your dizzy should be straight.

what color smoke: black = fuel, blue = oil, white = coolant

its white for the most part but it smells rich like its not burning up all the fuel and my tip is caked in black soot

and no im not throwing a check enginge light it did once when it stalled as it bogded down but it went away after i started it

thanks for all your help

i would pull the plugs on it and see what they look like... the car could seem very slow cuz its running super rich

Whoa dejavu! My car did the same thing except for my needle. Any ways I got my head rebuilt valves,valve seals etc etc. It lasted for a month, I jumped on the mass pike got up to 80 mph and then BOOM! My bottom end blew. The guy at the machine shop said that once you rebuild the head high mileage blocks can't keep up and he said... " Sorry kid I must have forgot to tell you" . I had around 181xxx on the bottom end, so just be careful and good luck.

im thinking it is running super rich cause it goes through quit a bit of gasoline could this be because of my tps? or just timing?

im replacing the fuel filter today and checking my plugs to see how they look

could be tps as well, did you take it off the throttle body before. If so i would calibrate it

i didnt take it off but i found an electrical test i can do to it to see if the tps is faulty but they are rivited to the throttle body how would i go about replacing that?

well you do the electrical test while the TPS is on the throttle body. if it is faulty you need to get a dremel and basically make an "X" on the rivets and then try to unscrew it with a screwdriver

So what happend? Did you fix the issue?

so i havnt gotten to the tps yet im going throught the whole elecrtical/fuel system as i said previously the exhaust wreaks of gasoline how do i turn down distributer to lean out my air fuel mixture? still gotta check my plugs to i guess today would be good for that

checked my plugs they look good but i noticed oil in the boot and around the plug

oil on bottom half of plugs = valve guides/seals. oil saturated on plugs = bad rings

the spark plug seals could be bad too if your getting oil on the plug as well