Question about 1993 Buick Skylark
I have no rpm input on scan tool. cranks oka, tried diff module and when you jump a and b pins at the crank sensor plug and grd the a pin with a test light i get no spark or pulse at the injectors from the ign module. Is there any inputs from the ecu that could stop the rpm signal?
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Posted on Jan 02, 2017
disconnect you battery. take something and fray back the plastic on the main hot wire on the coil. take another wire and wrapp it to the main wire you just frayed. now take that wire and run it to you ignition fuse. re connect you battery and see if your vehicle will start. if so than you have either a break or a short in you hot wire for your coil.
Posted on Aug 01, 2008
SOURCE: no start
if it runs on starting fluid its a fuel problem.. check fuel pressure even if its a couple of pounds off, the vehicle will not run. but using starting fluid may give you the extra poundage you need to make it run . also check vacuum hose at pressure regulator on fuel rail
Posted on Aug 02, 2008
SOURCE: 1991 Buick Regal will not start
Chech to see if you're gettin a signal from the crankshaft position sensor located behind the crank pulley. If no signal, you have either a bad sensor or a bad crank pulley. There is a reluctor ring on the pulley that separates and goes bad. If you have a good square wave signal from the the crank sensor it's probably going to be the computer. I've replaced a lot of them. They do really wierd things when they start to go. Check all of your grounds first. Also, while the car is running, shake and pull on the wiring harnesses for the computer. I've seen on a few cars where a wire or 2 will go bad and cause and occational short.
Posted on Nov 07, 2008
SOURCE: no injection pulse
looking at the schematics, well the PCM controls the pulse width to the injectors , BUT , there is a injector coil fuse , its #2 in your kick panel fuse box , a 20 amp , check it , sure hope that fix ya . that would be sweet .
Posted on Jan 15, 2009
Tips for a great answer:
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A faulty engine coolant temperature (ECT) sensor. Compare the ECT with intake air temperature (IAT) on a completely cool engine with a scan tool. The ECT should be within 3?°C (5?°F) of the IAT. If not, refer to DTC P0128 .
You need a scan tool to check this stuff !
Did you perform the Diagnostic System Check-Engine Controls?
Go to Step 2
Go to Diagnostic System Check - Engine Controls
Did you find an open fuse?
Go to Step 10
Go to Step 4
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