EEC-IV and speed input

nolife · September 21st, 2007, 04:15 PM

The EEC-IV has an input for speed. Even while in N, the EEC-IV will hold the RPM a little higher then normal idle while moving forward and during your slow to a stop. What or where is this input from and where would it be connected to the computer? My stock 91 does this action fine but my 88 that was converted to MA does not seem to have this connected or that function is not working. I have some stalling when quickly going to N or stopping fast and I've already swapped the EGR and the IAB. I also have some idle hunting at times (random) and I've done everything I've read in troubleshooting guides for hunting. Not that I think the hunting is caused by this lack of speed input but it is one more thing that I would like to investigate and eliminate if possible.

Any tips would help.

86ttops · September 21st, 2007, 04:51 PM

dn of any speed sensor i di mass air conv on my 86 it doesnt have one and i it did it would be in the transmsion I no if you converted it you have to have a 5 speed computer for 5 speed car and so fourth might check that

September 21st, 2007, 04:15 PM	#1
nolife Hardcore Enthusiast Join Date: Dec 2006 Posts: 1,160	EEC-IV and speed input The EEC-IV has an input for speed. Even while in N, the EEC-IV will hold the RPM a little higher then normal idle while moving forward and during your slow to a stop. What or where is this input from and where would it be connected to the computer? My stock 91 does this action fine but my 88 that was converted to MA does not seem to have this connected or that function is not working. I have some stalling when quickly going to N or stopping fast and I've already swapped the EGR and the IAB. I also have some idle hunting at times (random) and I've done everything I've read in troubleshooting guides for hunting. Not that I think the hunting is caused by this lack of speed input but it is one more thing that I would like to investigate and eliminate if possible. Any tips would help. __________________ 1991 GT - Original owner, all stock 1988 GT - The project car

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September 21st, 2007, 04:51 PM	#2
86ttops Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 782	dn of any speed sensor i di mass air conv on my 86 it doesnt have one and i it did it would be in the transmsion I no if you converted it you have to have a 5 speed computer for 5 speed car and so fourth might check that

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