I checked the relay and its fine, I have tried taking out the relay and starting it and it will run the first or second time and then it wont start at all, it will just keep trying to turn over. SO then i plug it back in and it will start back up. But what made me do all these steps is that the car was ran past empty and then is sat for awhile and then it would not start until about the 7th time trying to turn it over (all of this after putting more fuel in)
Test the electrical circuit . Testing Electric Fuel Pump Problems with Voltage Drop Test
GM Fuel Pump Relay Testing
SOURCE: fuel pump relay keeps blowing on my 1996 Cadillac STS, why?
replace fuel pump wires.they could be shorting out pump relay.
SOURCE: 94 cadillac concours deville 4.6 northstar ,
replace fuel filter first. cheapest and easiest.
SOURCE: Please describe your what is
There can be a misfire too from the cylinders.
An engine that
hesitates, stumbles or misfires when accelerating or when
it is under load is an engine that is either sucking too much air, not
getting enough fuel or misfiring. If the Check Engine Light comes on,
you may find any of the following codes:
• P0171, P0174 Lean
fuel condition codes
• P0120 to P0124 Throttle position sensor codes
•
P0222 to P0229 Throttle position sensor codes
• P0400 to P0409 EGR
related codes
If there are no misfire codes, a common cause of
acceleration stumble is a bad throttle position sensor (TPS). The TPS
tells the computer how far the throttle is open. The computer uses this
information to determine how much fuel is needed to maintain the correct
air/fuel mixture and when extra fuel is needed if the throttle suddenly
opens wide.
Another common cause is dirty fuel injectors. If
varnish deposits have built up in the tips of the injectors, they won’t
spray as much fuel as they normally do, or will “dribble” fuel instead
of spraying a fine mist. This creates a lean fuel mixture and
conditions that are ripe for stumble and hesitation (also misfire). Look
at short term fuel trim (STFT) and long term fuel trim (LTFT) with your
scantool.
If the numbers are high, it tells you the engine is running lean and
the injectors need cleaning. Treat mild cases with a high quality
fuel-injector cleaner additive. Severe cases require professional
cleaning equipment.
Also if this sensors apply to your
vehicle, camshaft sensor or
crankshaft sensor if sensors bad you don't get any spark.
Good
luck and rate this solution,
please.
SOURCE: Please describe your what is
I have been doing this work for 35 years and there is no certain cause for this no start problem, the 1st thing that needs to be done is to have the computer (called the PCM) tested for fault codes that will indicate what part of the electronic fuel and ignition system is malfunctioning, then tested are preformed to determine if the issue is a sensor or a connector or the computer causing the issue, the common area's are ignition problems, there are many component's in the electronic ignition system so the test is needed to ID which one may be at fault, the test connector is in front of the steering wheel and below the dash, u will need a shop to read the codes or buy a cheap code reader from kragen or a parts store like kragen
SOURCE: cadillac fleetwood turns off after running
check ignition coil and ignition module sounds like there getting hot and shutting off very good sign that there bad
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