89 Throttle Response

[Slo5Oh89]

I have a pretty stock 89. I have noticed when I let off the gas there is a 1-2 second delay till the engine starts to reduce rpm. So I am starting to think it might be reducing my response with acceleration!

I have zero idle issues. TPS Sesnor?

I do have a MSD 6A box and coil.

This just seems odd to me. Seems to of developed over the last few months.

Any ideas?

 

[Lscam580]

Check your iac and then check voltage on tps .94-.97 volts

 

[Slo5Oh89]

I have had iac issues before but how am I to check it for this? I will check the tips never have before. Any other ideas?

 

[Micheal Nadeau]

Is the car a manual or automatic? Have you checked to make sure the throttle blade isn't sticking or the cable is hanging up?

 

[Slo5Oh89]

Is the car a manual or automatic? Have you checked to make sure the throttle blade isn't sticking or the cable is hanging up?

Manual

 

[Micheal Nadeau]

Slowing down in gear or nuetral?

 

[jrichker]

All the EFI fox 5.0 Mustangs have a built in dashpot feature in the computer. When you let off the gas to slow down, the computer adds a small amount of air via the IAB to prevent stalling when you come to a stop.

 

[Mustang5L5]

Run the codes. If there isn't a code...don't worry about it