Acceleration Hesitation

[KnightOwl]

I have a slight hesitation when I acclerate from a stand still. I also had an issue where the expy would start but I needed to keep my foot on the gas pedal to keep it on. I thought it was the fuel pump or filter so I changed both only to realize that wasn't the issue. So I cleaned the IAC and that did the trick. Should I have replaced it with a new IAC? Could that be the reason I still have the hesitation? I need help from some Vets or nubbies like me with a slightly higher IQ than I got...lol

 

[BakerEdition]

might be a Throttle Position sensor...it could have a dead (flat) spot in it....might need a thottle body cleaning...what year & engine...have you done the gotts mod?

 

[Explor2Exped]

I had the same acceleration problem until I did the TPS mod.

Check it out: http://expeditionforum.com/showthread.php?t=11834

 

[KnightOwl]

I'll check out the TPS and see about throttle body cleaning. Oh and whats the gotts mod?Thanks for the input.

 

[KnightOwl]

I have a 97 5.4 engine

 

[Go4Life]

This may be a dumb question, but how do you know if you TPS is going bad?

 

[docraymund]

It's most probably a throttle position sensor problem. Another cause would be a defective crankshaft position sensor. Both would cause acceleration problems.