JK engine sputter in neutral below 1500 rpm

[spacemanspiff]

i posted earlier about an engine stumble at beginning of accelerating. I have a new symptom. in neutral I cannot control the engine rpm below 1500rpm. engine idles at 650 and any movement of throttle the rpm goes to 1500, from 1500 up I can hold the rpm. according to cheap scanner the throttle has smooth percentages if operation. any ideas ?

 

[BLACKJKU]

Low fuel pressure, bad fuel pump?

 

[spacemanspiff]

Low fuel pressure, bad fuel pump?

I haven't checked fuel pressure but it runs great after the stumble

 

[Chris]

No codes I assume?

 

[spacemanspiff]

No codes I assume?

no codes

 

[spacemanspiff]

no codes

it happens so fast I'm not sure it would register a code

 

[BLACKJKU]

I think it's a dead spot in the gas pedal.

 

[spacemanspiff]

I think it's a dead spot in the gas pedal.

I'm thinking that or throttle body

 

[franka548]

I agree with BlackJKU, sounds like a bad spot in throttle resistor.
Frank

 

[Chris]

I'll tell you this, if you keep driving it, it will likely throw a code.

 

[spacemanspiff]

I'll tell you this, if you keep driving it, it will likely throw a code.

I'm hoping it will