blue_pill85
New Member
- Joined
- Aug 20, 2018
- Messages
- 6
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1994
- Make / Model
- ford
- Transmission
- Automatic
so in my weeks of searching ive seen this issue or similar a million times however i have yet to see it solved.hopefully we can so lets go back to the beginning. i bought a 94 ranger 4x4 4.0 ohv auto trans about a year ago. ran rough when i got it. plugs and wires junkyard maf did the trick til recently. all of a sudden at a stop light it started surging and bucking almost died idle drops to 500 rpm (where it has been since) put in neutral and gave it about 1500 rpm for a sec. now it idles rough in park. in gear it surges and bucks. finally figured out how to check my codea and that they were 3 digit. refer to the title. checked maf voltage a- battery neg gave battery voltage, batt pos to b gave battery voltage, c to bat neg 5.9 volts, i honestly dont remember doing d offhand but i did. replaced ect new part, helped a bit for 2 days, replaced maf with parts store brand spanking new for 100 (unplugged battery connected terminal, swapped out maf, connected battery) still runs like poop throws identical codes (returned maf not made of money), checked voltage to tps 1.09 at idle, checked resistance on iat sensor to chart got resitance that made sense... idr exactly but close per chart not -4000*, played with and cleaned maf connector got iirc .9volts signal at idle, pulled all plugs (motorcraft oem as i had found recommended lurking trs) all equally covered in dry black carbon cleabed them with electrical parta clraner i had on hand) replaced wires again had a buddy verify i put them on rught for sanity check. that brings us to today. pulled the plug off the iac valve falls dead on its face. cleaned iac with throttle body cleaner (not as well as i wouldve liked but only had a small about in the can) just to see what it does cuz im a curious sort i loosened the iac while it was running. with a little air gap idles great. cleaned iac pintle(sp?) moves freely reinstalled runs like crap. (damn did not unplug battery will do later) anyways also the clear flooded engine test. after idling for a bit. key on pedal down vroom fires right up and revs. wtf right? so sanity check i rev it up to maybe 3500. shut it off foot on the pedal still. try clear flooded again key on pedal down cranks for days. so obviously shes holding some fuel at idle? repeated both tests with same results.
came inside to start writing my experiences down hopefully with some help we can figure it out and get a solution poated so the next poor bastard doesnt have to blow a bunch of money and time chasing these gremlins. i have not replaced iac yet but i think thats.my next step anybody have any comments? im doing all this from youtube and trs lurking.
also sorry if.my post is hard to decipher... if it is.lets work it out like i said save the next schlub some headache this seems to be super common. ill try to get some videos on this thread as well
Sent from my SM-J320R4 using Tapatalk
came inside to start writing my experiences down hopefully with some help we can figure it out and get a solution poated so the next poor bastard doesnt have to blow a bunch of money and time chasing these gremlins. i have not replaced iac yet but i think thats.my next step anybody have any comments? im doing all this from youtube and trs lurking.
also sorry if.my post is hard to decipher... if it is.lets work it out like i said save the next schlub some headache this seems to be super common. ill try to get some videos on this thread as well
Sent from my SM-J320R4 using Tapatalk