Question about 1994 Buick LeSabre

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The problem im having is that the car runs excellent its just that sometimes its appear to be starving for air i beleieve fire and fuel is good change fuel cannister twice this yearput three new coil packs in it car runs great but when your driving sometimes it appears not to be getting air or gas and slug down hesitating to regain power but if i cut car off and restart i get that thrust again and sometimes it takes a few times before i can proceed to drive after the sluggish action what could this be checked air flow sensor unplugged and cleaned bab one cut car off when i plug air flow sensor back up but good air flow sensor stays running when i plug it back up what could this be need help please

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Disconnect the battery and clean and restore all connections.

try to run the car as if there was never a problem. continue and operate all the accessories. if its driveable take a short trip and evaluate

if it seems ok, take it on the freeway and put it through a complete drive cycle.
if it acts up, get a scan tool and see what codes are in it.
then continue diagnosis.
get a manual or google the codes.
or, pull into a shop that is an emission control repair authorized facility.
ask a technician to drive with you to experience the problem(s)
he/she can pull the codes and make recommendations.
those shops specialize in correcting that system in the most cost effective manner. by law, they tell you only what it needs, and keep their certifications up to date. not every shop is under the state guidelines for emission repair. you can get a list of shops at the testing station, or on the computer. each state has numbers to call for questions and recommendations

its difficult to make out exactly what you are experiencing from your description. i think showing someone will help you the most in the least amount of time.
I.E. replaced fuel cannister twice??? why ?
and.. air flow sensor??? is that, IAT or MAF or MAT ?? throttle body? TPS ??? and you say you had it unplugged while the engine was running?? thats a no/no
its like you have a description of blocked aircleaner, but you have been replacing ignition components.. and with A/C delco??? parts?

Posted on Apr 14, 2014


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Posted on Jan 02, 2017

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SOURCE: engine stalls

your on the right route but also check egr valve

Posted on Jul 07, 2008

  • 11 Answers

SOURCE: 1994 uick lesabre barely runs when pushing gas ped

also with request of pcv valve check does car shake or vibrate when trying to accelerate? if that is to be the case more than likely bad pcv valve.

Posted on Mar 31, 2009

  • 3113 Answers

SOURCE: my engine shuts off while im driving

Check ecm for number 1228253. If it has this one in it you will have a cutting off problem. Gm replaced these with #16198264 The cam sensor magnet on the cam gear will deteriorate and give problems. This will require removal of the timing cover.

Posted on Apr 17, 2009

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SOURCE: car turns off while driving, and now it wont start

It maybe a bad crank angle sensor or a bad throtle position sensor.

Posted on Sep 09, 2009

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SOURCE: Car started hesitating then died

replace the fuel filter,if this does not help,replace the fuel pump.

Posted on Mar 03, 2010

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