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1989 Ford Taurus No injector Pulse

Tiny
ANTHONYL79
  • MEMBER
  • 1989 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
I have a 1989 Ford Taurus that died while driving. I had the module on the side of the distributor checked at my local auto zone. I have spark, I have proper fuel pressure as well. Checked for injector pulse and I dont seem to be getting anything there. Not real sure where to go from there.
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Monday, May 17th, 2010 AT 11:59 AM

10 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check for power at the injectors
use a test light check for battery power at the injectors with key on
do you have power?
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Monday, May 17th, 2010 AT 5:53 PM
Tiny
ANTHONYL79
  • MEMBER
  • 6 POSTS
I do have power. The way I tested for pulse: Pull conncetor from injector, jumped across with test light and cranked. No response with the test light.
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Tuesday, May 18th, 2010 AT 9:32 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
PCM ground the injectors if have battery positive next step is to check for codes

check TPS volts
it should be at about.5V if not unplug and try
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Tuesday, May 18th, 2010 AT 8:39 PM
Tiny
ANTHONYL79
  • MEMBER
  • 6 POSTS
I have taken my test light and hooked it to ground and I have power on both sides of the injector harness with the injector unplugged. I can get it runnig with carb cleaner, but not getting fuel. I dont have a volt meter to check voltage. Is it right to have pwere on both sided of the connector? Checked for codes and nothing. The light just stays on. Thanks in advance!
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Wednesday, May 19th, 2010 AT 6:55 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
For the injector to work you need power which is you have
and the ground and that is supplied by the PCM
what you tested is for the power
know test for a ground pulse on the other wire
to do so
connect the test light to battery positive side
Disconnect injector
have a helper crank engine for you as you check if the test light pulse as engine cranks
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Wednesday, May 19th, 2010 AT 7:10 PM
Tiny
ANTHONYL79
  • MEMBER
  • 6 POSTS
With my test light I seem to be getting a pulse. But still no start. Thinking pull injectors and crank to see if I have fuel?
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Wednesday, May 19th, 2010 AT 9:48 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
If have pulse
have to check for fuel pressure
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Wednesday, May 19th, 2010 AT 9:59 PM
Tiny
ANTHONYL79
  • MEMBER
  • 6 POSTS
I do not have pulse. I did check fuel pressure, that was first thing on my list to check. I then checked spark. Then went to pulse. I couldnt tell with my test light, so I pulled the injector out and cranked it. Had no fuel coming out of the injector. I can use test light and make the injector work, so I know its not bad injectors. Crazy also I have the ICM apart and the fuel pump realy is going crazy, really fast clicking. If I unplug the cooling fan the clicking gets even faster! Tried to take a screw driver and cross the starter relay, (two big terminals) and its like its a dead short. About a year ago I reaplace the IGN switch under the dash and the main harness in the vehical was burnt!? Thanks
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Monday, May 24th, 2010 AT 11:29 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
If have power and no pulse
check wiring to the PCM if wiring good
no codes and TPS volts under 1volt
suspect bad PCM
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Monday, May 24th, 2010 AT 9:59 PM
Tiny
ANTHONYL79
  • MEMBER
  • 6 POSTS
Ok. Will do and keep posted! Thanks
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Monday, May 24th, 2010 AT 10:01 PM

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