Sn95Drift

1990 Ford Mustang h.o 5.0, it bogs/stutters,revs up on its own doesn't want to run. Then after a minute revs up to about 2k idles down and runs perfect. I'm at a loss here,has anyone experienced this?

What I've done:
-checked timing
-checked firing order
-tested msd box and distributor
-Checked cap and rotor
-checked plugs
-cleaned m.a.f

Sn95Drift

.





http://youtu.be/R3AEIC8x4q8 Video of it in action, at 26 seconds in changes and runs fine

dawson1112

Fix your dumb header leak, your sucking air into the exhaust and your 02s are sending lean readings to the ecm.

Then after that make sure you don't have any vacuum leaks

Sn95Drift

If the customer wanted me to fix the leak I would. Also I already fixed the problem. Had to adjust the tps.

UltraBlue91'

You pull codes yet? Do smoke test and check for leaks. Check BP sensor, mine recently had same symptoms. Fixed some vacuum leaks and replaced BP sensor and that fixed it.

mitchell1963

I know one thing will scare you.Years ago my mustang would just pick up speed on it,s own going down the road.The throttle position sensor was the cause and all i could do was hang on and pray.