89 Ranger 2.9L

ptofimpact · Feb 23, 2016

67,000 original miles, runs good except, the throttle 'sticks' at a certain rpm, then must Mash the accelerator pedal to make it reduce rpm's. Cable all lubed, even put a double return spring on the throttle body at the cable end. Same result, any suggestions most appreciated.

canthelpitimaguy · Mar 24, 2016

Did you clean the throttle body? 67000 original miles on an '89 makes me think it had a lot of time to sit and collect dust

WildSide · Mar 25, 2016

Remove the cable from the TB and check for binding, it the throttle body is completely free then remove the cable and lube it from the bottom with WD40 and make sure the pedal does not bind.

adsm08 · Mar 25, 2016

And don't ignore the IAC. If it is sticky it can do the same thing, complete with throttle mashing to bring down idle.

RonD · Mar 26, 2016

Yes, +1

After engine is warmed up, unplug the IAC Valve, then start engine, it probably will not idle so you will need to keep foot on the gas pedal, then drive it to see if throttle still seems to "stick", if not then clean or replace IAC Valve.
They are easy to clean

Pictures here: http://www.fordrangerforum.com/how-to-submissions/6078-clean-iac-valve.html

And here: http://www.explorerforum.com/forums/showthread.php?t=84220

89 Ranger 2.9L

ptofimpact

New Member

canthelpitimaguy

Member

WildSide

New Member

adsm08

Senior Master Grease Monkey

RonD

Official TRS AI

Sponsored Ad

Sponsored Ad

Staff online

Members online

Member & Vendor Upgrades

Latest posts

Truck of The Month

Recently Featured

Follow TRS On Instagram

Latest Album Photos

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store

Sponsored Ad

Sponsored Ad

Sponsored Ad

Amazon Deals