Its on a 94 Ranger 2.3L dual plug head. I know the 121 code is the tps voltage stuff, and the 335 deal with the egr. Problem is, how to fix it? Any ideas?? Or do i just need to buy a new tps and egr sensor??

 

Put the new egr sensor on it. And its still doing it. Guess its the tps??
Also my dad messed with the idle screw, So i really dont know where its suppose to be since theres no tach.

 

Really? No Help?

 

Can you tell where the knocking noise is coming from??? Have you tried disconnecting the negative battery cable to reset the computor???

Did it die before you cleaned the MAF???

 

That knocking sound is that coil bracket. We had to modify it to get it bolted on. Yeah, The battery has been in and out of the truck numerous times. And yes it did die before i tried cleaning the maf. Im thinking its just the tps now since its the only code its throwing. It threw a egr code put the sensor on it and that went away but no change to the way it idles.

 

Have you checked to see if there is any voltage to the MAF sensor,

 

How do I check that?

 

This link should help you:

Part 1 -Ford MAF Sensor Test (P0102, P0103, P1100, P1101)

Have you checked for any vacuum leaks?

Here iisanother link for testing TPS:

http://oldfuelinjection.com/?p=30

 

Well on the vacuum leaks, I grabbed one of my buddies smoke machine that you hook up to test for vacuum leaks. Ran it, and never saw any signs of smoke come out. If the maf was messed up wouldn't it throw a code?? Like i said, its still throwing a tps code. and it runs better with the mass air unplugged. Would the tps be the culprit??

 

Yes the tps could be bad, test the tps, the link i attached should help test it.

 

Man I can not find a wire piercing probe anywhere but amazon. I was hoping I wouldn't have to order and I can just got get one. But no one carries em?

 

Here is a video on testing a tps on a 5.0 ford engine that should help you test thhetps also.


Do you have a multimeter?? Do you have a test light that you could use the tip of to pierce the wire and hook the multimeter to???

 

Have you gotten this thing running right yet?

 

Well I finally got my power probe and it turns out the tps is putting out like 5 volts.