Ranger revs wide open between shifts

[deltas69]

I seldom come here as my Ranger's hardly have a problem..I'm on my third having put over one million miles on my previous '96 and '93 which my son is still driving. But my '94 has developed a problem with wide open throttle between shifts. 2.3 five speed, 162,000 miles runs fine idles fine..but as soon as you take off and start shirting the rpm's go almost wide open between shifts as if you were speed shifting. Coming to a stop I have to almost stall it then it will idle down correctly and idle as long as you sit still..as soon as you start..the problem returns.. I've replaced the idle air control valve, throttle position sensor, checked for vacuum leaks, ..I've replaced suspect vacuum lines, vacuum tree...etc anything associated with the vacuum system without success..It is throwing a EGR code..but..so is the '93 my son is driving and it has no problems.. In fact he just left..he's a certified mechanic on Ford, GM, and Cummings diesel and he has yet to determine the problem..other than the throttle problem, it runs fine and everything works..I drive it 200 miles per day on a parts route and have no issues other than one stated...anyone have a idea of where to look ?? Thanks for any help !!

 

[fastpakr]

How does it behave if your simply disconnect the idle air controller?

 

[rusty ol ranger]

It could be the EGR sticking open and creating a massive vaccuum leak

 

[Josh B]

I seldom come here as my Ranger's hardly have a problem..

Maybe that's why! Check in more often and you might find all kindsa stuff it needs

 

[bobbywalter]

assuming the throttle body isnt notchy with the cable detached....sounds like you need a new or fresher throttle cable.

 

[ericbphoto]

My dad had a Plymouth Volare that would do that when I drove it. Then after my second or third driving lesson, the problem stopped.

 

[Uncle Gump]

Holy Richardo Monttalban flash back Eric....

 

[acsnowrider]

You mentioned a EGR code--What is it, and does it happen during KOEO self test, or during KOER self test?? (KEY ON,ENGINE OFF, or KEY ON ENGINE RUN)

 

[deltas69]

Well...never thought of that..but I'll give it a try tomorrow when I can see..(dark now..and cold)..lol Thanks for the tip

 

[deltas69]

egr code is 337..throttle linkage and cable are find not sticking or binding....haven't unplugged the iacv yet been working on a massive pc problem allsay...could the mass air flow sensor cause this >>. 2000 miles ago my son had to put a new head on it due to a cracked head..all new valves, timing belt, water pump. tensioner, thermostat...he cleaned the maf..as well as the egr..although the egr was not clogged..it runs perfectly except for this high rpm issue..thanks for the help

 

[deltas69]

DPFE SENSOR PERHAPS ??? I remember replacing that on my '96 Ranger ..thanks again