Truck surges while accelerating..

[koda6966]

okay, so my truck has developed a new problem, it surges while it is accelerating. Is this an issue with the fuel sensor, or do you think it is more problems coming from having a bad transmission? It only happens while I'm in overdrive, I think.

Please excuse any spelling errors, grammer mistakes, etc. I'm on my girlfriends laptop and I'm not used to the keyboard.. too touchy

 

[fourwheelford]

It does it from a dead stop while the OD is on? I always lock mine out while im driving in the city otherwise it is sluggish to take off but mine is a 2000. Of course if your tranny is bad and you know it is for sure then that is probably your issue, have you tried a fluid change?

 

[koda6966]

How often should I change the fluid? I'm semi-sure the guy that did my brakes for me changed em, because he had a couple bottles of tranny fluid on my bill and he told me he did it, but that was during December. (about 3k miles ago)

And I haven't tried from a dead stop, I have it in drive until I hit about 40ish.

 

[fourwheelford]

Not sure about your truck but the change interval is like 60,000 miles on my auto tranny fluid, if that guy just sucked it out and put new stuff in then you still have an old filter in there. It almost sounds like your OD band is slipping in and out of gear. Try just driving it in drive at those speeds and see if it still does that should narrow it down a little bit hopefully. Do you always turn on the OD over at 40 even in the city or do you just turn it on when your cruising at that speed for awhile? I usually engage mine at 45 to 50 unless im still getting up to highway speeds in which case I engage it when I hit top speed. Mine has a push button lock out on the shift lever so it will jump in and out if I keep having to hit the gas, I don't know much about yours though. Good luck to you hope you get it figured out.

 

[koda6966]

I usually put it in around 40.. not really sure where, just as long as I'm not going up a steep hill or just starting out/stopping I have it in OD. I know the tranny is probably bad because alot of the time it doesn't engage in any gear.

 

[fourwheelford]

Pretty safe bet that it is the tranny then, you could try a good fluid and filter change but at this point it may be a waste of money better spent on another tranny. I owned a T-bird that did the same thing I had to let off the gas to get it to "grab" the gear. Check junk yards, around my area you can get a tranny for these trucks for like 50 bucks with the torque converter if you pull it yourself, but you never know how the previous owner took care of it so its a toss up.

 

[koda6966]

The yard I go to has em for about 100 I think, but on a day they have a sale I can drop in and get one for 50 plus core, but I can get my core charge back if I take my old tranny in, which I will.

If it's no good I think they have a 30 day warentee but I'm not sure. I'll have to check.

I was also going to look into buying a whole truck. Then I'd have lots of spare parts.

 

[fourwheelford]

Thats a good point, parts trucks are always good Happy hunting!

 

[koda6966]

Plus, I could part out everything I'm not gonna use on here. Basically all I would be interested in from a parts truck is a bed if it's my color and sound, a tailgate, rear axle, and the transmission. Maybe powersteering too. Mine leaks like a son of a gun.

Probably power windows and locks if it has it. That's always a nice upgrade.

 

[koda6966]

Lets pretend like I have a new transmission, would a bad fuel sensor or something in the fuel system cause the above problem, AND cause my vehicle to occasionally stall out and shut off when idling at a redlight?

 

[Runnin'OnEmpty]

Lets pretend like I have a new transmission, would a bad fuel sensor or something in the fuel system cause the above problem, AND cause my vehicle to occasionally stall out and shut off when idling at a redlight?

A bad fuel pump could cause those symptoms.
If you have access to a fuel pressure gauge, it's
easy and quick to check it.

 

[Ranger44]

Your IAC controls Idle at stop and when the throttle is closed. Mine was sticking a while back. I checked it with my DMM and it read at 10ohms, The spec is 7-13ohms. So I cleaned it and have been fine ever since. Yours could just be sticking closed.

When's the last time your fuel filter has been changed?

 

[graff104]

Surging when acelerating is probably not a stuck IAC but it never hurts to check that thing out. I would test fuel pressure. Even being able to rule that out would give us a better idea at the bigger picture.

 

[koda6966]

Changed the fuel filter, problem solved.