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rough idle 305 TPI HELP! the car is a 91 z28 w/ a 305 5speed.the car starts fine but when it warms up (close loop)the idle is rough like it has a mild cam.when i hit the throttle the car bogs and then it revs up.the fuel pressure does not drop when i do this.i've replaced the following: cap and rotor spark plug wires(MSD 8.5)and plugs o2 sensor MAP sensor TPIS removed throttle body & IAC cleaned w/ throttle body cleaner fuel filter have steady fuel pressure sprayed intake base for leaks checked cat to see if it was clogged ran car w/ open pipe did same thing any ideas would be a BIG HELP! Jason |
Re: rough idle 305 TPI HELP! Is it throwing any codes? |
Re: rough idle 305 TPI HELP! Take attention at the advance timing, not only set the initial timing at 6º BTC, also look what happen when you reconect the test wire. At this time the advance should be about 16-20º. |
Re: rough idle 305 TPI HELP! i forgot to mention no codes are showing.when you say check the advance should the wire be connected or disconnected? I did check the timing,it was @ 10 degrees were i set it. Jason |
Re: rough idle 305 TPI HELP! sorry,just noticed you wrote w/ wire connected. |
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