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99 Malibu the motor kinda pulsesates like its cutting out !! Replaced plugs , fuel filter still does it , ?

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  • Cars & Trucks Master
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Dec 17, 2012

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Posted on Jan 02, 2017

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SOURCE: 99 tacoma

Still need the codes.
Injectors can go "bad" in a couple of different ways; all they are is an electromagneticaly controlled nozzle. When the ECU "fires" the injector, it pulses a ground circuit for 4-8 milliseconds, the electromagnet powers up, the valve at the bottom of the injector opens, and the fuel shoots out, under pressure. The wire can be bad/chafed/corodded/ The electromagnet may be weak. The nozzle may be stuck. Lots of things. But, to put in an injector for a number 4 cylinder misfire (p-0304 code) would be one of the last things that I would do.

Posted on Nov 21, 2008

  • 4 Answers

SOURCE: replaced fuel pump and 2002 malibu still will not start

You need to check your fuel pressure on the fuel rail... Did you use a used fuel pump?

Posted on Jan 12, 2009

phoenixinks
  • 89 Answers

SOURCE: engine cuts out on acceleration

could be the pump or injectors or both. while your at it check your fuel tank for rust dirt any thing.

good luck

Jason

Posted on Jan 17, 2009

  • 16 Answers

SOURCE: 99 Daewoo Lanos random misfire.

replace crankshaft senor, its bad, faulty. Check your O2 sensor. change fuel fuel filter and spark plugs and wires with new ones.

Posted on Mar 14, 2010

  • 73 Answers

SOURCE: My 99 ford explorer cuts out and dies when accelerating in drive

You may have dirty or clogged fuel injectors, may also be problems with the ignition system. Might also check the fuel pressure to make sure the fuel pump is working correctly.

Posted on Mar 28, 2010

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1 Answer

99 Malibu cuts out kinda like it starving 4 fuel, changed plugs,fuel filter, could it b the map sensor?


There are many things that will cause this problem, could be a fuel pump or pump relay, mass air flow sensor etc,

The best thing to do first would be to go to an auto parts store that does scanning. have the computer scanned and see if there are any stored codes, if so get the codes and let me know what they are.

Dec 08, 2012 | Cars & Trucks

1 Answer

99 Malibu kinda pulsesates when going down road at steady speed,


What--- Brakes Pulse?

Need to work on brakes once a year

Could also be an ABS Braking System issue--
have those checked out

Dec 01, 2012 | Cars & Trucks

1 Answer

'99 Chrysler T&C van stalls without warning but starts right back up with no problem. nothing registers on computer. replaced fuel filter, had tune up. Still stalls every now and then. Stalled 8...


When was last tune up? Plugs, wires, all fluids & filters especially fuel filter? I'd start there and run a good fuel system cleaner through it. Also avoid cheap fuel - lot of questionable fuel at cheap/cut rate stations.

Apr 01, 2011 | 1999 Chrysler Town & Country

1 Answer

99 malibu always read inconsistant fuel levels but now engine light came on and stalled on the highway.Codes read lean fuel and misfire. Exhaust smells horrible she sputters when left idle and idles low...


check to make sure catylitic convertor is not plugged. if it is ok, then put a code scanner on to read codes, may have a bad 02 sensor. if you dont have a scanner, most auto parts places will scan vehicles for free.

Dec 31, 2009 | 1999 Chevrolet Malibu

1 Answer

99 chevy malibu fuel mileage going down. Use to


check you mileage if the car has over 100,000 miles and you have not had a tune up it maybe time for spark plugs, air filter,fuel filter and spark plug wires if needed

Dec 17, 2009 | 1999 Chevrolet Malibu

1 Answer

99 Daewoo Lanos random misfire.


replace crankshaft senor, its bad, faulty. Check your O2 sensor. change fuel fuel filter and spark plugs and wires with new ones.

Oct 20, 2009 | 1999 Daewoo Nubira

2 Answers

I have 99 malibu, i have replaced the fuel pump


sounds like its cranking? check for spark and fuel

Oct 12, 2009 | 1999 Chevrolet Malibu

1 Answer

Missing


have you tried fuel ejector cleaner....may solve your problem.....

Feb 02, 2009 | 1999 Chevrolet Malibu

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