Engine fluttering around 1500 Ron's

[Dangerranger390]

The truck was running fine then the next day I got in cranked it up idled fine. When I put it into gear the rpms drop but go back up. Not really worried about that but don't know of its part of the issue. When it warms up I can raise the rpms to about 1500 Rpms and the rpms start to jump. Once I make it past about 1800-2000 Rpms it doesn't do it. It acts as if the maf sensor is not connected. And it only does it through 3rd gear.

I unplugged the maf sensor while it was running and the Rpms jump like it does around 1500. I didn't let it run long enough for it to die. I plugged it back in while it was running and even at idle it was jumping. I turned the truck off and started it back up and it idled fine again. I raised it back to 1500rpns and it started jumping again.

I looked through previous forums the only thing I could fin similar was the maf sensor.

How can I test it to see if its working.

Also to I have a universal cold air intake it's in a u shape and in the bottom of the pipe is oil. If I look into the throttle body I see oil. I don't think that is causing the Rpms to jump but I had someone tell me that I could replace the egr valve and that might fix the oil.

Could the egr valve be causin the jumping in Rpms?

 

[PanamaExpat]

Here is a good resource on Ford EFI and includes your MAF sensor. http://oldfuelinjection.com/?p=1

To find out more simply type ''Test MAF sensor'' into the search box in the upper right corner of the page.

 

[Dangerranger390]

It also smells like its running a little lean

 

[Dangerranger390]

After reading my 86 ranger 2.9 has a map sensor not a maf

 

[alwaysFlOoReD]

Check your fuel pressure

 

[PanamaExpat]

Well then since you have a MAP sensor.... type in ''test MAP sensor'' and a plethora of knowledge unfolds at your fingertips.

Isn't the search feature a wonderful thing?

By the way .... I AM NOT BEING A DICK. But you have been around here long enough to know about the search issue.

 

[adsm08]

My first thought on this is that there my be a dead spot in the throttle position sensor.

My next thought is an oxygen sensor.

 

[Dangerranger390]

It seems like knock on wood but the issue kind of fixed itself. I had thought throttle position sensor to but from te searches I've done I was getting a lot of map/maf sensor issues. Which when I disconnected the map sensor, it did exactly what it does while I'm driving while but at idle. Yes I know the search problem and did utilize it and should have payed more attention to my questions and not have asked that. I apologize I know it gets frustrating seeing the question when there's I'm sure a million posts with the answer. While I was at work someone said o2 sensor which it very well could be but like I said it seemed to have corrected itself for the time being. In the very near future I plan on replacing several items that will hopefully correct a lot of my issues. I have a lot of little issues with my 86 ranger that I'm slowing trying to fix. Jerry rigged everything compliments of the previous owners who thought they were a master electrician/mechanic. I will deffinetley look into the tps cause it deff made sense thanks for the info.

 

[Dangerranger390]

Here is a good resource on Ford EFI and includes your MAF sensor. http://oldfuelinjection.com/?p=1

To find out more simply type ''Test MAF sensor'' into the search box in the upper right corner of the page.

Thank you for this website it will come in handy and be very useful. Bookmarked for future reference