My 95 F350 7.3 turbo w/E4OD 369k mi starts almost immediately but chugs between 350-700 RPM until I feather the throttle for a few seconds then smooths out. It does not matter warm or cold. Other issue is randomly while driving the check engine light comes on and I completely lose the throttle, light goes out after a few seconds and throttle returns but the trans starts quick shifting( is in forth gear by 20mph).

I had the codes pulled and it had codes for tps, cps, and ebps. Ive since disconnected the ebps and replaced the cps. I bought a tps today only to find out the plugs are different, mine has the small oblong oval plug and new one has a larger squared off plug. Will prolly have to cut and swap the pig tail.

I have read previously that the tps is prolly the cause of a lot of my issues, ( hard shifts, general sluggish performance, and the random check engine light). I don't see how, but could the tps have anything to do with the start up idle situation?

I bought this truck for a $1k with the start idle issue and a few others with the intention of taking my time fixing it up. It has now become my daily driver and I'd really like to get this sorted out before I lose anymore hair over it!!

Thanks for help!!

 

Get an APS (accelerator position sensor) not a TPS that's why the plug won't fit.

 

I've heard of the MLPS causing a bouncey idle.
Other thing to check would be the ICP sensor.

My truck used to do that but only when cold out. Hasn't done it in awhile though. So I don't know what caused it. Lol Maybe the ICP sensor, it's been unplugged now though. Still need to replace it, but I got burned with a cheapie.

 

Try starting it in neutral. If it doesn't romp when you start it in neutral, then it is the range sensor (MLPS) on the side of the transmission as mentioned above.

 

Guys, what happens if the PCM is for a 5 speed? Does it act like this?

Kevin

 

Good question.
But running a auto with a 5 speed pcm, I don't even think the trans would shift.

 

No change in neutral, still chugs until I give it some throttle.

 

EBPS will affect shifting unless you have a chip that doesn't look at the sensor

 

Ebps is unplugged, I'm in Texas! The truck is bone stock other than a CAI.

I did learn getting parts under 1995 year model is wrong for my truck, must be a 1995.5 as the correct tps was listed as 1996.

 

EBPS unplugged will default to limp mode for shifting.

15 minuets you can replace the tube with brake line if you have a flaring tool.

 

So I replaced the tps with the correct unit, no change! I'm still getting the random check engine light and loss of pedal with erratic shifting afterwards.

I bought the AE scan tool, not much help so far. It says there are no codes, it is my understanding that there should be something there if the check engine light comes on? My ebps is unplugged, shouldn't that pop up as a code?

I did notice that after start up if I rev the engine to around 2k and hold it for 30 seconds or so the check engine light comes on and the OD light on the shifter starts flashing. The OD light also flashes while driving when this whole situation is happening. Could this all be caused by a going bad mlps?

 

If the od light is flashing, you should be seeing a transmission code.

 

Is AE reading live data? If it's not, and it's not returning at least a P1111, then it's not configured correctly.

Why is the EBPS disconnected? Is the tube clogged?

 

It's reading live data fine. I went down the list and looked at every parameter listed but nothing seemed to be out of whack, it was all in the green.

I unplugged ebps after learning I had a code for it and then what it does and that I don't really need it down here in Texas.

 

Did you unplug the EBPS or the EBPV? The one on the outlet of the turbo or the one next to the HPOP res?