95 Dodge Ram Van B2500 3.9L magnum MPI engine Codes 27 and 45 - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums

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post #1 of 1 Old 05-13-2019, 05:18 PM Thread Starter
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95 Dodge Ram Van B2500 3.9L magnum MPI engine Codes 27 and 45

A few weeks ago I was running errands and the van started running really rough. I pulled into AutoZone to speak with a friend who has mopars and other race cars and a van similar to mine. He suggested new plugs and wires. The van was due for a tune up so I changed plugs , wires, dist cap, pcv valve, and crankcase vent . No change still ran rough. Their coder couldn't read 95's. Went to O'reilly's and they had a code reader that would do 95's, and we got code 27 (injector circuit# 6) and code 45 ( overdrive circuit). They said the battery was bad so I got a new one at Bumper to Bumper and I replaced the injector and the connector, no change. I replaced the 2 other injectors on that side and connectors . The next day went to start it NO CODES, both the 27 and the 45 were gone. YAY, I thought. Drove 5 miles running errands, and when I started it up to leave the last store, guess what. Check engine light and code 27 and 45 were back. Went ahead and cleaned the EGR valve and replaced the idle air control valve. The idle air control valve helped only slightly. But van still ran rough and both codes. Noid light says injector 4, 6 and 2 are all getting pulses from ECM. And the #6 plug is wet, with orange spark, if that means anything. Any suggestions? I was thinking maybe the overdrive and injectors ran off the same wire color since both codes were gone for that 5 miles. Ugh this is beyond my scope of knowledge and I am doing everything I can think of but very frustrated. The last store we went to has a steep entrance to parking lot, I still think there may be a bad wire somewhere and it got jolted when I went up into the lot. But i jiggled and so far haven't noticed any difference jiggling wires. yes I'm a little bit country. "jiggling" is my mechanical term. Please offer suggestions, I cant seem to find a wiring diagram, I could do well with that. Haynes books are crap for wiring diagrams.

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