New cadillac Problems!


lilrogue78
08-04-2006, 02:34 AM
well problems are still around still fuel related also and yes i have a good fuel pressure reading/fuel pump... Well here is my issue, car was running like crap so i checked a few injectors to see if they were spraying and all 4 front ones were doing a fine job but i found only 2 of the back ones were working the computer was sending the signel to spray but there was no steady current going to the injector. So i spliced the constant power wires from the bad injectors into the wires of the good ones and at that point she ran like a raped ape again untill yesterday she uped and flat out died so i started checking and now none of them has a steady current so i piggybacked off of the distributer power wire into the rear injector wires and i'll be damned she fired right up and ran great but i noticed when i get on it going down the road that at around 4,000 rpm's she starts to lose power which i assume means i dont have enough current running to the injectors to allow them to keep up with the fuel flow i'm not really sure what the proper way of checking this would be so anybody that can suggest why i have no steady power flow or any ways to adjust my current contraption that makes it run better please be my guest at telling my at least somthing thanks everybody!

-dave

maxwedge
08-04-2006, 04:45 PM
well problems are still around still fuel related also and yes i have a good fuel pressure reading/fuel pump... Well here is my issue, car was running like crap so i checked a few injectors to see if they were spraying and all 4 front ones were doing a fine job but i found only 2 of the back ones were working the computer was sending the signel to spray but there was no steady current going to the injector. So i spliced the constant power wires from the bad injectors into the wires of the good ones and at that point she ran like a raped ape again untill yesterday she uped and flat out died so i started checking and now none of them has a steady current so i piggybacked off of the distributer power wire into the rear injector wires and i'll be damned she fired right up and ran great but i noticed when i get on it going down the road that at around 4,000 rpm's she starts to lose power which i assume means i dont have enough current running to the injectors to allow them to keep up with the fuel flow i'm not really sure what the proper way of checking this would be so anybody that can suggest why i have no steady power flow or any ways to adjust my current contraption that makes it run better please be my guest at telling my at least somthing thanks everybody!

-dave
Wow this not a proper way to do this ,first you probably blew a pcm /injector circuit fuse so no 12v to any injector. 12v is at all the injectors but then then pcm pulses or grounds them at the proper sequence.Find the source of the 12v feed, get a noid lite on each injector and check for pulse, if all 8 have pulse but some do not spray those are bad injectors. Year of car is required here also!

lilrogue78
08-04-2006, 07:42 PM
First off it is a 1990 2nd is all fuses are goood and well before this thing uped and quit it was having problems where it would all of a sudden drop a cylinder or two...or even up to 4 and run on 4 cylinders and it was always the back bank of injectors going out so i know somthing has got to be bad somewhere ad seince i hooked the wire up it runs great but no high end powerjust like its not getting enough fuel

maxwedge
08-04-2006, 09:57 PM
Same question, do you have pulse on 8 injectors, if not the pcm is not signaling some of them or if it is the injector is bad, an ignition module can also cause some injectors to drop out, some basic diagnostics are in order here.

lilrogue78
08-07-2006, 06:03 PM
acually it will most of the time run on all 8 and yes all injectors are good but at times the computer will just suddenly drop a cylinder or a few and i will check for signel from pcm and their is nothing but that still does not explain the reasoning for no power at all running to the injectors and why i have to run a power wire for them...

lilrogue78
08-07-2006, 06:07 PM
here are my current codes
E015,E030,E049,E052,E053,E099
B111,B112,B552

DFBonnett
08-08-2006, 07:31 AM
here are my current codes
E015,E030,E049,E052,E053,E099
B111,B112,B552

Too many unrelated codes. Check and thoroughly clean both battery connections at both ends and as many grounds as you can get to. The computers in these cars will register false codes if there is a lack of full voltage to all components.
FWIW
YMMV

MasterMind1
11-25-2006, 12:43 AM
max is right , this is absolutly the wrong way to go about this!. First of all put it back the way it was designed !, power is fed directly from two fuses in the underhood fuse block and its not front on one and back on the other fuse, one fuse feeds inj #'s 7,1,6,4 the other feeds 2,5,3,8, if infact you are losing the 12 volt feed , you need to test doing a voltage drop from the fuse to the injectors until you pinpoint where your losing it

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