Question about 1989 Oldsmobile Cutlass Supreme

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Bad fuel injectors - 1989 Oldsmobile Cutlass Supreme

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Have them changed out

Posted on Sep 01, 2010

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Can bad fuel injectors cuase lean codes


Lean means there is not enough fuel with relation to the air the engine is using, so yes bad fuel injectors could cause this. But usually, unless all injectors are bad, you would have misfire codes if one or two cylinders have bad injectors. More likely, you have a vacuum leak somewhere causing the leanness. Other things to check would be a dirty MAF sensor, faulty PCV valve, or bad O2 sensor.

Nov 16, 2016 | Cars & Trucks

3 Answers

Can a bad fuel pressure regulator cause a misfire on one cyl?


no- the fuel regulator regulates pressure in the fuel manifold to which all the injectors are connected
if it is just the one injector then
it is the injector
the wiring to the injector
blocked tip for the injector

Jun 27, 2015 | Cars & Trucks

1 Answer

Fuel injector not working ford e350


Are they getting gas?... if so bad injectors maybe clogged
If no pressure to fuel rail then clogged fuel filter or bad fuel pump

Sep 02, 2014 | Ford E350 Cars & Trucks

1 Answer

One fuel injector is not shooting out gas. new fuel injectors, new fuel pump, new fuel fitler,fuses ok, and relay are okay. so what is the problem/


either the wiring between the injector and the computer is bad, or the computer is bad. (ecm) the RED wire on both injectors should have 12V. connect a test light to the positive of the battery, now connect the tip to the DARK GREEN wire or the DARK BLUE wire on the injectors. you should get a rythmic flicker at the light when cranking the engine.. if both wires flicker, the injector thats not flowing fuel could be bad. if 1 does not flicker, check the wire to the computer, those wires go directly to the computer, no connectors. if the wiring is good, I suspect the computer is bad.

Sep 08, 2011 | 1991 Chevrolet Caprice

2 Answers

Fuel injector is spraying irraticly


Verify with multimeter or test light that power and ground are being applied when fuel injector should be opening, if electrically everything is sound, replace the fuel injector.

Mar 28, 2011 | 1991 Chevrolet Cavalier

2 Answers

Would the water in fuel module being bad have any reltionship to a bad injector ?(f250 06 6.0l)


fuel module controls the fuel injection thru the fuel injector and being bad there will be a no start situation.there may be a bad injector (not all in one time)but the engine shld start.this model has a primary and secondary fuel pump.the first one is located at the rh rear chassis while the second is on the engine top portion.

Jan 16, 2010 | 2006 Ford F-250 Super Duty

2 Answers

Can bad fuel injector damage spark plugs on a 2005 Ford Expedition? and if fuel injectors being replaced should less labor be needed for spark plug replacement?


A bad fuel injector can cause spark plug issues. If the injector does not supply enough fuel, the cylinder(s) without enough fuel will run hot, often damaging the spark plugs.

But your mechanic needs to make sure that the injector is the issue and not a fuel pressure issue from regulator, filter, or pump. Hopefully he/she has already done those checks.

As far as the labor cost being less the spark plugs wouldn't be removed during the fuel injector replacement. Even if they did, most mechanics won't cut the price. But if you are a regular customer it can't hurt to ask.

Jan 11, 2010 | 2005 Ford Expedition

1 Answer

Cyclinder #3 no fuel ,no codes everything else is fine


You cold have a bad injector, the best thing to do is to swap out the injector with another injector like #2 injector and see if cylinder #2 get's no fuel. If there is no fuel in to #2 then you need to replace the injector, if #3 still has no fuel then it's going to be the wire harness to the #3 injector that is bad. If there is an Auto Zone you can loan out a fuel injector node that will indicate if there is power to the injector harness which would indicate a bad fuel injector so you don't have to swap out the injectors twice. Good luck and hope this helps you get your car running 100% soon. 

Sep 04, 2009 | 1995 Mazda MX-3

3 Answers

Good spark -- fuel supply line has fuel -- will not start -- either sprayed into air intake -- car immediately fires -- why are cylinders not getting fuel?


possibly a bad pressure regulator or injector module not letting the injectors fire. check out both more than likely the injectors are not firing.

Aug 30, 2009 | 1989 Buick Riviera

1 Answer

Ford-F350 7.3 turbo sluggish when you accelerate


i dont know about the turbo going bad,but i do know that ive seen 7.3 diesel have bad injectors,usually 2 at a time, check for fuel at the injector which can get messy so wear protective gear such as goggles and gloves,while running crack open the fuel line at the injector to see if there is fuel,it should run rough which is good on the working cylinders,if it doesnt change then maybe a bad injector,or not enough fuel pressure at that injector.injection pump issues are another thing,but most likely its an injector.

May 09, 2009 | 2001 Ford F350 Super Duty SuperCab

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