cuts out before it hits

[hostutca]

Hey Guys and Gals

95 3.8 mustang... Missing at idle lightly and When I hit the gas the engine dies down, sputters for a split second and picks up... drives great on highway.... any suggestions?

New plugs/wires, K&N filter... Thought I heard a hissing at the pcv but I think it was just the valve humming along...

What do you think?

 

[hostutca]

oh yeah, no codes...

It threw an o2 but I fixed that last week

 

[wmburns]

Replace the fuel filter. Clean the MAF. Use cleaner designed for it.

Check for vacuum leaks. If you can hear a hissing sound, likely there is a leak. Today's car will NOT run right with even the tiniest vacuum leak.

The TPS is important for a 95. May need to test.

 

[hostutca]

thanks burns! I cleaned the MAF i forgot to mention that earlier... I was afraid of just replacing stuff because I have been in that loop before and before I know it i've dropped more money that a diagnostic and a fix myself would have been originally... but I guess I can just chalk it up to preventative maintenance!

 

[hostutca]

alright... check engine light came on...

P0174 System Too Lean - Bank No. 2
P1150 Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 2.
P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2.
P1152 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 2.

Did the Bank 2 sensor one go out at the exact same time as the bank1 sensor1?

 

[wmburns]

Check your fuses.

Check for vacuum leaks. In case you didn't get I will say it again. Even the SMALLEST vacuum leak will cause problems.

Your particular codes are usually the result of a BIG vacuum leaks. In fact, I think you may have a leak in/around the EGR tube.

While you are at it, change the PCV valve. What is the condition of the vacuum lines from the PCV valve to the engine? Old/soft/cracked/oil soaked?

 

[redsox1211]

I had a similar problem in my work F150 and it was the throttle body