93 Mustang GT - Help

Well you said it smelled like excess fuel was being delivered into the engine. One thing to make sure is that there isn't any fuel leaking through the fuel pressure regulator. Sometimes leaking diaphragms will allow fuel to travel through the vacuum lines and add in extra fuel.


Also make sure that your EGR isn't stuck open, disconnect the vacuum line to it and hook up a vacuum pump if you have one and make sure it can go through its full range of motion.

Check the mass air also, sometimes those go batty.

If the TPS stuck at 4.5V+ it could cause the car to stumble,, but not as bad as you have described.

Sometimes the computer connections are dirty/ rare occasion

I know the Ten pin connectors have been a trouble source for mustangs also.


The biggest thing to do is to create a big vacuum leak if you are dumping too much fuel and by doing so the car would smooth out. If it get worse by creating a vacuum leak then you know you are already too lean.
(shadetree advice)

I hope this helps keep us posted on what you find!
Good Luck

hey Treachery, I noticed you said that you recently replaced a head gasket and have a Blower on your motor. Do yourself a favor and get a dyno tune and a chip burned for your car. My friend kept blowing head gaskets when he first put a blower on his car. Good luck with your problem and ttt for ya.

Matt

to check the fuel regulator, pull the vacuum hose off of it when the engine is off and smell the hose. if it smells like gas then replace the regulator.

did you notice any black smoke? Maybe it's a stuck injector? By the way, I wouldn't create a lean condition on a blower car unless you want to rebuild...

black smoke means rich

maybe you bent your pushrods or flattened the cam or the head gasket