Mendax13

i got codes 12 27 27 13 on my 95 jeep cherokee

now it did start with me doing the 99 intake swap.
i put a 99 intake with ford 710 injectors with the 49# regulator and new exhaust manifold

and with all of this happening i believe its misfiring but not throwing a code.

12 Battery disconnected. Battery or power to the ECM disconnected in the last 50 key cycles.
13 MAP Sensor. No change in Manifold Absolute Pressure (MAP) between engine off and on. Check circuit and MAP sensor.
27 Fuel injector control circuit. Will need specialist diagnostics.

really not sure where to begin. 12 makes sense as i did disconnect it to reset the ecu.
now 13 may be an old code. when i hooked it up we found the one connector split and we have since replaced it . but maybe its still current?

27 with new injectors? idk. im really not sure where to start atm.

freegdr

Disconnect battery for at least 15 minutes reconnect then drive see what codes if any return, disregard 12 and 55.

Mendax13

alright reset the ecu again. left unattached for 45 minutes grounded positive for 30 seconds then attached then koeo headlights on 10 second then off ign off and started. ran well for about two minutes. went in to the house and came out to the check engine light. checked codes. and again 27 shows up.

Mendax13

a few days of driving and it seems to be intermittent. sometimes on start up sometimes after a while driving. it runs rough when it throws the code. but still drives alright. i went out last night and ran it it ran rough so i went under the hood and tried wiggling the harness and connectors and it didn't seem to change. anyone dealt with this? ive seen a few on other forums but none of them came to a conclusion.

I'm thinking of getting a stethoscope and listening to the injectors tomorrow. if they're good. check voltage to the injectors. (might do that first since i have the tools for that). after that i really don't have a plan. any help is welcome

steven72192

Have you cleaned these injectors before installing them? Also did you swap harness to make the ford injectors work?

Mendax13

i cleaned and rebuilt them new rings filters and caps. they are both ev1 connectors. so the connectors fit no problem

Mendax13

alright its been a while and it still throws codes 27. but it seems to only happen at idle. and the idle drops very low. below 500rpm

also out of the blue 41 shows up and thats the switching field for alternator. havent had much of a chance to look into that one.

could they be related if its dropping really low on rpms and not charging as good? also still cant figure out 27. thinking of changing the regulator and decrease some fuel flow. thinking its running to rich. any ideas?

freegdr

Change alternator first requlators in ecm . Moes 95 was doing strange things when he had intermittent alt code . Replacing alternators cured all issues.