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idle issues


rusty7983

Member
Joined
Oct 12, 2012
Messages
62
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Location
Hohenwald, TN
Vehicle Year
86
Make / Model
Ford
Engine Size
2.9
Transmission
Manual
hi, I am working on a 92 ranger 4.0. when I first looked at it the iac was unplugged, and it would idle on and off. I plugged it back in when cold and worked. off when warm. I put a new one on replaced fuel pump filter and regulator to get correct fuel pressure. it seemed to idle worse. it currently runs for about 20 seconds then dies, restarts but dies. it has had issues for some time, is a friends, was her dads, and had sat for 2 years. it has almost every possible new sensor and thing replaced. I need help. I have had this issue before on other cars and had a bad crank sensor. any ideas?
 


rusty7983

Member
Joined
Oct 12, 2012
Messages
62
Reaction score
0
Points
6
Location
Hohenwald, TN
Vehicle Year
86
Make / Model
Ford
Engine Size
2.9
Transmission
Manual
I have checked the basics vacuum leaks etc. thanks
 

Ewgoetz

Member
Joined
Oct 30, 2016
Messages
51
Reaction score
1
Points
8
Location
Venice, Florida
Vehicle Year
1994
Make / Model
Ford
Engine Size
4.0
Transmission
Automatic
rusty7983 said:
hi, I am working on a 92 ranger 4.0. when I first looked at it the iac was unplugged, and it would idle on and off. I plugged it back in when cold and worked. off when warm. I put a new one on replaced fuel pump filter and regulator to get correct fuel pressure. it seemed to idle worse. it currently runs for about 20 seconds then dies, restarts but dies. it has had issues for some time, is a friends, was her dads, and had sat for 2 years. it has almost every possible new sensor and thing replaced. I need help. I have had this issue before on other cars and had a bad crank sensor. any ideas?
Click to expand...
This sounds exactly like what mine was doing a few weeks ago. Have you pulled codes?

If all the sensors have been replaced, I’d probably pull the ecm out and open it up and check for burnt or blown up capacitors or corrosion.

Mine was doing the same thing and was throwing maf codes. Replaced the maf and same thing. Pulled the ecm and opened it up and a capacitor in the middle had corrosion and was burnt up there as well.

I had to order a rebuilt ecm from eBay.
Cause cardon was or is on a blackout till feb 28th.
Cost me $200 after shipping.
 
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