Stumbling issue
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From: Whitehall,PA
Stumbling issue The car is an 01 Mustang that I swapped in a 5.3 from an 04 Avalanche w/ a 4l60e from a 2000 Camaro Z28. I did the harness myself.
The problem is when driving the car 1st gear seems fine, but when it shifts into second it starts stumbling real bad. I tried disconnecting both O2 sensors and that made no difference. I haven't driven the car on the road yet(only in the alley) to see if once it gets out of second gear if it changes at all. When it sits in park it revs fine and souds real good ,very responsive. It has a mailorder tune on it.
On another note, will a VSS from the above mentioned truck trans(I believe it was a 4l80e) work with the 4l60e? Thanks for the help,Mark.
The problem is when driving the car 1st gear seems fine, but when it shifts into second it starts stumbling real bad. I tried disconnecting both O2 sensors and that made no difference. I haven't driven the car on the road yet(only in the alley) to see if once it gets out of second gear if it changes at all. When it sits in park it revs fine and souds real good ,very responsive. It has a mailorder tune on it.
On another note, will a VSS from the above mentioned truck trans(I believe it was a 4l80e) work with the 4l60e? Thanks for the help,Mark.
Thread Starter
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From: Whitehall,PA
Thread Starter
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Joined: Oct 2009
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From: Whitehall,PA
No, there aren't any codes. The only parameters I can check are those available through my Actron scan tool.I'll hook it up and take a ride and see what info it logs.
The engine is stock no mods, truck intake and all.
The engine is stock no mods, truck intake and all.
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Joined: Sep 2007
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From: Kansas City, MO
Since it's all stock check your fuel pressure. You want about 60psi. Tape a fuel pressure guage to the windshield and drive to make sure you have suffecient fuel under load. If that is ok, there may be something going on in the tune.
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From: Whitehall,PA
Well, I picked up a fuel pressure gauge,hooked it up,and took the car for a ride. Fuel pressure drops to about 30psi and picks back up to 60psi. I had to modify the fuel "hat" that the factory pump sits in and I think its going into fuel starvation from fuel slosh. I'm gonna fill the tank and see if it happens then.
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From: Whitehall,PA
. It looses traction so easily. 