I have a 95 dodge ram that has a code 27 showing. I can not find the problem after checking wiring with noids, hom meter and visual inspection. It has new injectors and a remand computer. There appears to be no reason for this code. Please help

 

Erm, from what I am finding code 27 is "No Manifold Absolute Pressure Change"... isn't it? That would imply a failed MAP sensor, or a hole in the vacuum line for it. (or it may simply be unplugged.)

 

i got your reply to my post on the 95 dodge ram code 27. what dodge says is that code 27 is injector driver circuit which is off of number 4 injector number 4 cyl. i put a new engine in,cranked it up. it ran about 2 mins and blowed the auto shut down relay.i can't fix the code.

 

A little more info like engine, trans, 2wd or 4wd.....would make things easier.....

What do you know about the "new" engine...is it really new?

 

Download the 95 service manual from the DIY/FAQ section and trace the #4 injector wire back to the PCM. Check the connector on the injector and the plug at the PCM.

 

Can you get it to run?

If so, while it is running, pull the connector off the #4 injector. Does it run the same or get worse?

Next, swap #4 injector with one on the other side of engine (becase the one on pass side have less crap in the way). Start engine and see if the problem moves. I suspect that the injector may be clogged or otherwise nonfunctioning or wiring to injector had a bad spot in it.

If the problem moves after swapping injector, the injector is suspect. If the problem stays on #4, then it is wiring or control to injector. As mine is a 99, I do not know how injector is fired on a pre-OBDII engine. The service manual that zman referenced should help narrow that down.

Hope this helps you get a little closer.