four cylinder problem
Posting Guru
Joined: Nov 2003
Posts: 1,387
Likes: 0
Originally Posted by pcatanza
I cleared the codes last night and rechecked them this morning.
This is the codes in order.
18
28
31
88
I don't know if it matters, the problem is on my 91 Ranger, standard cab, 5 speed manual transmission.
Any ideas.
This is the codes in order.
18
28
31
88
I don't know if it matters, the problem is on my 91 Ranger, standard cab, 5 speed manual transmission.
Any ideas.
18- erratic IDM input to the processor
28- Loss of IDM-right side
31- EVP circuit below minimum voltage
88- Loss of dual plug input control
my scanner manual says:
18- Loss of TACH signal to ECA
-or-
DIS Fault-primary circuit failure in coil 1,2,3, or 4
-or-
EDIS fault-failure in SAW circuit
28- EDIS fault- failure in coil 3 primary circuit
-or-
DIS fault-loss of right side TACH signal
31- EVP sensor- signal boltage is below minimum specification.
-or-
EGR valve is not in its normal closed position
88- DIS problems- loss of dual plug control
looks to me as though you should start trouble shooting the distributorless ignition system (DIS)
for code 31 you may just need a new evp sensor, about $30.
Posting Guru
Joined: Nov 2003
Posts: 1,387
Likes: 0
Originally Posted by pcatanza
Any tips on trouble shooting the distributorless ignition system (DIS)
My understanding of how this system works is limited.
My understanding of how this system works is limited.
https://www.ford-trucks.com/lc/lc.ph...Diagnostic.doc
