Wire schematic

Tiny
SRBSTN2256
  • MEMBER
  • 1985 CADILLAC FLEETWOOD
  • FWD
  • AUTOMATIC
  • 150,657 MILES
Need wire scematic on inj an what makes it pulse
Wednesday, March 16th, 2011 AT 7:09 PM

25 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
The computer makes it pulse. Do you have constant power to the injector and do you have spark?
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Wednesday, March 16th, 2011 AT 7:35 PM
Tiny
SRBSTN2256
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Yes it has constant fire on the a terminal but wont pulse
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Wednesday, March 16th, 2011 AT 10:10 PM
Tiny
WRENCHTECH
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And the spark?
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Wednesday, March 16th, 2011 AT 10:10 PM
Tiny
CADIEMAN
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Injuctor fuse could be blown. Remove the air filter and inspect the injector harness if the harness has a exposed wire it will blow the fuse. Gl
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Wednesday, March 16th, 2011 AT 10:44 PM
Tiny
WRENCHTECH
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He has already stated the injectors have power. We're checking reference signal.
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Wednesday, March 16th, 2011 AT 10:45 PM
Tiny
SRBSTN2256
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The fuse was blown changed that. But inj will not pulse. What should I check next. Didnt see any bad spots in wire harness. Car is cranking but one inj wont pulse
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Thursday, March 17th, 2011 AT 3:09 AM
Tiny
WRENCHTECH
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Do I understand you correctly that only ONE injector has a problem? Have you checked the signal with a noid light?
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Thursday, March 17th, 2011 AT 12:18 PM
Tiny
SRBSTN2256
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Yes
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Thursday, March 17th, 2011 AT 2:31 PM
Tiny
WRENCHTECH
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That can only leave 2 things then. Either there is a problem in the trigger wire back to the computer or the quad driver in the computer is burned out. If the computer is bad, then you need to look for a cause like a shorted injector.
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Thursday, March 17th, 2011 AT 2:51 PM
Tiny
SRBSTN2256
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Ok changeg ecm but still no pulse
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Thursday, March 17th, 2011 AT 2:55 PM
Tiny
WRENCHTECH
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So, diagnose it properly as it should have been before changing the ECM
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Thursday, March 17th, 2011 AT 2:59 PM
Tiny
SRBSTN2256
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Ok so how do I do that?
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Thursday, March 17th, 2011 AT 3:08 PM
Tiny
WRENCHTECH
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You test all the wiring and injectors for opens and shorts and test all the power and ground inputs to the computer. If you are not equipped or knowledgeable to do this, then have someone do it for you.
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Thursday, March 17th, 2011 AT 3:14 PM
Tiny
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Ck fuse again if the blown ck the harness again. Sometimes it gets shorted at the grommet through the valve body. Disconect the harness and pull the grommet out. Ck the fuse and turn key on. Wiggle the harness around. Ck. The fuse again if blown youll need to remove the tape to better check the harness. To ck. The injector swap the injector harnesses 2 see if the injector starts pulseing if no the injector is bad. Make sure swap the harness back gl
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Thursday, March 17th, 2011 AT 4:43 PM
Tiny
WRENCHTECH
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Both injectors are powered by the same "ECM IGN" fuse so if it's blown, you lose both injectors but you stated earlier that you had power to the injectors at all times so can you clarify your response.
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Thursday, March 17th, 2011 AT 5:11 PM
Tiny
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Wrench tech is right but u got to find out whats blowing that fuse its got to be by the throttle body gl
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Thursday, March 17th, 2011 AT 5:41 PM
Tiny
SRBSTN2256
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Yes I have fire to both inj but one is pulsing with noid light but one insnt wrenchtech what can I do to check the one that is not pulsinging
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Friday, March 18th, 2011 AT 6:24 AM
Tiny
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Swap harness to see if inj. Starts workin if no replace inj. Need to stop that fuse from blowin gl
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Friday, March 18th, 2011 AT 4:49 PM
Tiny
SRBSTN2256
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I changed inj an its still not pulsing. What can I do next. Inj was bad
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Wednesday, March 23rd, 2011 AT 6:30 AM
Tiny
SRBSTN2256
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Can anyone get me a wire schematic of inj harnest please
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Monday, March 28th, 2011 AT 2:03 PM

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