Idles great - no throttle response at all

[barrycomo]

Hi... first post... but lurker for some time.

My 95 7.3 has finally stranded me... I was having fuel problems (horrible fuel) now a new issue has cropped up.

Truck: 95 7.3 crew 4x2 dually auto trans all stock... 145K miles... daily driver.

Last couple of days it has been not responding to the throttle until it gets a few minutes of warm-up time... Today, it will not respond to the throttle at all. It starts and idles like a champ... but the throttle does nothing. I know it is FBW... and I have read a bit about TPS... so here is my question...

Does this sound like a TPS? This is a part I am TOTALLY unfamiliar with... is it a repair part or replace part? Cost?

I also read about the CPS... could this be the cause?

Any insights would be SOOO greatly appreciated!

Thanks a ton!

PS: The CEL comes on only when you press the throttle... I am going now to try to pull the codes...

James

[95dieselsmoke]

sounds like the tps to me, my did this once to me, thank god it was just that the plug behind the pedal came unplugged, im sure you made sure to check that, but if you havent check it out. there is a plug in behind the pedal somewhere that may be unplugged.

[Hardline]

The CPS will cause it not to start but not a lack of throttle reponse. I would check for the throttle pedal switch .

[barrycomo]

Thanks guys...

I had it towed to my local PS mechanic (great guy and works mainly on PS) since I was unsure of what the problem is... I was unable to pull codes using my OBDII reader... So... if we can test and get a new TPS tomorrow, life may be fine again.

I do almost all my wrenching (farm kid)... but I had a weird problem a while back where 1/2 the engine stopped firing and I couldn't seem to pin point the problem... when I called my mech and he said it was a valve cover gasket... I almost laughed... he hadn't seen it and within 10 seconds knew what the problem was??? I thought he was wacco... Of course, you know he was correct! That was the day I knew I could count on him to fix my PS when I am stumped.

It sucks when your daily driver is out of commission... Will have to revert to two wheels (Honda ST1300) for the day. Oh, well... not that bad... as long as the parts are available!

Thanks again!

[95dieselsmoke]

Originally Posted by barrycomo

Thanks guys...

I had it towed to my local PS mechanic (great guy and works mainly on PS) since I was unsure of what the problem is... I was unable to pull codes using my OBDII reader... So... if we can test and get a new TPS tomorrow, life may be fine again.

I do almost all my wrenching (farm kid)... but I had a weird problem a while back where 1/2 the engine stopped firing and I couldn't seem to pin point the problem... when I called my mech and he said it was a valve cover gasket... I almost laughed... he hadn't seen it and within 10 seconds knew what the problem was??? I thought he was wacco... Of course, you know he was correct! That was the day I knew I could count on him to fix my PS when I am stumped.

It sucks when your daily driver is out of commission... Will have to revert to two wheels (Honda ST1300) for the day. Oh, well... not that bad... as long as the parts are available!

Thanks again!

good luck with the fix man, keep us posted on what the mechanic finds.

[barrycomo]

OK... got the results...

P0220 Throttle Switch B Circuit Malfunction

So my mech replaced the switch (the one below the TPS) with one from another salvage truck and it all works great.

Seems that to get this one switch I would have to buy the whole pedal assembly. <ARG>!

Back on the road again! A bit lighter wallet... but better than a new truck payment!!

[Diesel Monkey]

Sounds like a great mechanic. The TPS is available without the whole pedal, around $49 instead of $300.