Question about 1997 Cadillac DeVille

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Got fire, fuel pump and pressure good, but no injector pulse.

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Check fuses and relays, might have to check wire harness for injectors, you may have a break in the wire and have to reconnect it. check for voltage at injectors one at a time see if its all or one

Posted on Apr 25, 2009

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1 Answer

What causes o low injector pulse


Is that static pressure with key on, engine off? Or engine running pressure? Both should be near 60, usually key on, engine off pressure will be about 3 or 4 psi higher.
If it runs good after starting, the injector pulse must be good. No reason why starting and running pulse should be different. Only difference is when running, fuel pump power is kept on by the oil pressure switch, whereas in starting, the fuel pump relay keeps the pump on. Very unusual, let us know. Measure voltage at one of the injector's power wire with key on. It should be battery voltage or very close.

Aug 22, 2015 | Cars & Trucks

1 Answer

My fuel pump iz working bt my injectors are not firing


Back probe the injectors with a led circuit tester, if there is no pulse trace the injector wiring back to the ECU for a broken or bad connection. If there is a pulse the fault will almost likely be fuel. check the fuel pressure and flow , if the flow is low replace the filter, if the pressure is low replace the pump/

May 21, 2015 | Cars & Trucks

1 Answer

Car wont start


Try a little starting fluid in the intake and see if it runs a few seconds. If it does, it could be low fuel pressure or an injector problem. Maybe they aren't pulsing.
You have voltage to the injectors; now check the ground circuit: Use a test light and clip the lead to the POSITIVE post of battery. Put the probe into the ground terminal on an injector connector, and have someone crank the car over. If the test light is blinking, the ground circuit is good. When it blinks, that is when the computer is grounding the circuit for injector pulse to occur.

Apr 20, 2014 | 1993 Chevrolet Cavalier

1 Answer

The dash gauges all work , fuel pumps are both good , the fuel pumps wont come on and the truck trys to fire when i turn the ignition on but wont , could this be a fuel regulator


did you check the fuel pressure pump on the frame rail for power and ground? have you verified no ignition spark to the spark plugs? have you checked for fire from the coil to the distributor cap? does the check engine light come on when you turn the key on? have you check for injector pulse and power at the fuel injectors? if the fuel pump won't come on and you have no ignition fire and no injector pulse, all of these systems are triggered by the ECM.

Aug 12, 2011 | 1990 Ford F150

2 Answers

My 1995 subaru will not start.  i have tried spraying starting fluid in the injectors the car ran for 2 seconds and died.


If the engine fired on ether it means that you have a fuel supply problem, check the fuel pump.

Jan 16, 2010 | 1995 Subaru Legacy

1 Answer

Jaguar 1983 injector no pulse


might be wise to check the fuel pressure

Dec 04, 2009 | 1983 Jaguar XJ

2 Answers

Crank no start: has no spark and only has injector pulse on cyl # 1. if you spray starting fluid directly into throttle body car starts and stays running and has spark and inj. pulse. once you turn the car...


Fuel pump, you have to have press in the rail to fire all injectors- she will run on ether but not good for her. Ck your pump and any related fuses,relays,wiring.

Jul 11, 2009 | 2002 Hyundai Accent

1 Answer

1993 s10 2.8 tbi the fuel pump fails to pressurize when the key is tunred on, and i have to fuel injector pulse. when a jumper wire is attached i can pressurize the pump but i still have no injector pulse.


There needs to be 60 PSI of fuel pressure in the system to have the fuel injectors to work. There is also a fuel pump relay on the fire wall just left to the brake booster, There is two relays there, i just can not remember which relay is which but try switching the relays with one another. Also check the fuses to the fuel pump and ECM, and the fuel pressure from the shredder valve. Good luck and keep me posted, not a bad Idea to also replace the fuel filter, and that is located at the inside frame rail under the drivers side.

Jun 03, 2009 | 1991 Chevrolet S-10

1 Answer

1994 pontiac bonneville fires up but stalls imediatly


WOW a 94 with 46K on it thats rare. Your computer may be bad it sends the pulse to the injector.

Apr 09, 2009 | 1998 Pontiac Bonneville

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