Hey all, new to the forum. My name is dan, i drive a medium red 1994 f150 xl, reg cab long bed, i bought it with 100,000 or so on the 4.9, at 115,000 right now. NY rust on the bed and fenders but strong underneath, fresh oil and coolant change, full tune up, belt, thrush exhaust, brakes, leaf springs, brand new tires, plus many small things. Averaging 21 mpg which i love, but it seems as if im not getting nearly as much power as i should be. Low end is great but getting up to speed feels as if all the power comes in a giant lump, then it shifts. I drive 40+ miles a day, so i know her well. no tach, and she shifts pretty rough into 2nd sometimes and 3rd every once in a while. A jolting shift that gets your attention. Im not too sure whats causing this, fluid is fine, ive done everything i can to make her run better but it seems luike something is holding me back, torque converter, psom, i have no clue but any ideas would be great. Oh and she used to throw the check engine on intermittenly for a couple seconds at a time but it hasnt done it in a month or so, love the truck, plan on keepin g her run until shes got no more to give!

 

That transmission is completely computer controlled so don't guess... ask the computer what's up.. meaning pull the codes.

 

ok, i have an actron handheld code scanner that the guy who i bought the truck from left, but ive never used it or pulled codes before

 

e4od trans needs a tach signal to function properly. its probably going into "limp" mode

 

It's time to get the manual out (or get one) and learn how to use it..

 

no manual at all

 

Go online with the model number of your scanner, you should be able to find a downloadable manual, or at least instructions for use you can print out...

 

thanks, got it, checking codes now, it says something about disconnecting the saw/ spout connector for the timing test, any idea where that is?

 

More like a signal from the tps to let the ecu know where the throttle is at all times to function correctly along with feedback from a number of other sensors to function properly, not necessarily a tach signal.

 

It's a small Lego looking piece coming off of the ignition module, either off the distributor or on the fender

 

koeo
111
111
123
263
433
263
4

 

123: Throttle Position Sensor Circuit Above Maximum Voltage

I think you messed something up, because the rest of the codes are not valid numbers, and just "4" is not a possible value to get at all.

 

i followed all the instructions as it said, off, plug in code reader, key on, engine off, turn the test switch and read the codes,
take 2
111
111
122- Throttle position low voltage, bad ground?
32
632-overdrive cancel?
332-low egr flow
634- manual lever position voltage problem?

 

Something still doesn't seem quite right with that 32.

For what it's worth, TPS and manual lever position sensor issues can give harsh/incorrectly timed shifts.

I'd try taking the truck down to autozone and having them run a read on it.

 

Yes, something is off here, these trucks have a 2 digit code or a 3 digit code, but they WILL NOT be mixed.....