Hey lately my cars been running weird when cold, I start her up and let it warm up for a few minutes, once I start driving after I let me foot off the gas the rpms free fall it almost stalls but slowly picks back up again, after about 10 minutes of driving everything seems fine, the o2 sensors, plugs, wires, cap and rotor, coil and iac are all new within the past couple of months and this weekend I cleaned the maf, changed the tps, air charge sensor , and I have a new engine temp sensor which is plastic? Which I've never seen if anyone else has? The cat also smells like its running rich , I tried pulling codes but nothing was coming up, thanks
Hey lately my cars been running weird when cold, I start her up and let it warm up for a few minutes, once I start driving after I let me foot off the gas the rpms free fall it almost stalls but slowly picks back up again, after about 10 minutes of driving everything seems fine, the o2 sensors, plugs, wires, cap and rotor, coil and iac are all new within the past couple of months and this weekend I cleaned the maf, changed the tps, air charge sensor , and I have a new engine temp sensor which is plastic? Which I've never seen if anyone else has? The cat also smells like its running rich , I tried pulling codes but nothing was coming up, thanks
Try cleaning your IAC and EGR.
Also, when you replaced your TPS did you make sure it was reading the right voltage???? Or did you just slap it on and go?
One thing I can say... When it gets cold outside, it's good to let your car sit and idle for about 2-3 minutes. That way everything gets oiled down good, and the engine warms up a bit. That alone can increase the life of your engine.
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-1994 Mustang GT... K&N filter,GT40 tubular intake,BBK Full Length Headers,modified midpipe & Flowmaster muffs, timing at 12*. Best time- 14.74 @ 93.16 -Check profile for pics of our car collection! -Member of MBMCustoms Car Club - AmericanMuscle ROCKS!! - "Save a horse, drive a Mustang!"
still cant find it the only thing i havent changed is the act sensor would that cause something like this, and i was also told to try seafoam to clean the intake anyone know how i would do that?
still cant find it the only thing i havent changed is the act sensor would that cause something like this, and i was also told to try seafoam to clean the intake anyone know how i would do that?
I'm not sure what could be causing your problem... Do you have a 5 speed or an auto?
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-1994 Mustang GT... K&N filter,GT40 tubular intake,BBK Full Length Headers,modified midpipe & Flowmaster muffs, timing at 12*. Best time- 14.74 @ 93.16 -Check profile for pics of our car collection! -Member of MBMCustoms Car Club - AmericanMuscle ROCKS!! - "Save a horse, drive a Mustang!"
5 speed its a 4 cyl swapped to 5.0 was running great until the headers I put on melted one of the plug wires so I changed the wires and protected them this time but it still runs a little rich no smoke, just smell and idle is just a tiny bit off maybe I'm just being ocd about it but its driving me crazy
5 speed its a 4 cyl swapped to 5.0 was running great until the headers I put on melted one of the plug wires so I changed the wires and protected them this time but it still runs a little rich no smoke, just smell and idle is just a tiny bit off maybe I'm just being ocd about it but its driving me crazy
If you're running with no cat's then a slight gas smell is normal...
Is it surging or what?
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-1994 Mustang GT... K&N filter,GT40 tubular intake,BBK Full Length Headers,modified midpipe & Flowmaster muffs, timing at 12*. Best time- 14.74 @ 93.16 -Check profile for pics of our car collection! -Member of MBMCustoms Car Club - AmericanMuscle ROCKS!! - "Save a horse, drive a Mustang!"
1993 Mustang gt runs weird at cold start up 
