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Weird Idle/Timing problem, seems to miss on load.

  • Thread starter Thread starter Rick's Fords
  • Start date Start date Nov 5, 2006
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Rick's Fords

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Dec 25, 2004
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Nov 5, 2006
#1
  • Nov 5, 2006
  • #1
My stang now has about 18-20k miles on it. Was running perfectly up until a few weeks ago.

The car started bogging down whenever I put a load on the motor, for example, granny shifting, and then giving it gas. Yes sometimes I have to keep it quiet. For the longest time I couldn't find out what was wrong, I played with the timing for a while, until I noticed my 6 mo. old TPS was broken. For the second time, the tabs on the sensor had broken. So I replace this, costs me of course, because Advanced has some odd people working sometimes.

Now I have a new problem. If the car is at 10 degrees BTC, like I was told it was supposed to, and I put a load on the motor, it seems to miss. Doesn't bog down like it wants to die, but misses. I can get past it if I hold the gas, but really uncomfortable doing that. So I advanced the timing today, slowly until it didn't do it anymore... then came the timing light. 18 degrees BTC. Now either my timing guide on the pully is majorly messed up, or somethings wrong here. She has plenty of power, but holy hell it won't idle less than 1k rpm. I can even back the idle screw all the way out, and it won't drop.

I'm thinking either an electrical problem having to do with the spark/timing, or when the guy rebuilt the motor, he didn't set the cam/crank timing properly.

I will be getting a test light sometime this week so I can check if there are any codes coming from the computer. All I want is for my car to run right so that I can get back to fixing the body.

Any ideas?
 

jrichker

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Nov 5, 2006
#2
  • Nov 5, 2006
  • #2
You may have some vacuum leaks. A vacuum gauge would be helpful. You should see 14.5"-18" of vacuum at idleand 17"-21" at 1000 RPM.
 
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