Question about 1989 Buick Century

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Engine stalls 89 buick century running fine one day, next wont even stay idling. Engine fires while starter engaged but most time it stops as soon as starter disengages.If it does idle its rough and applying any throttle causes engine to stall out. Fuel pressure at 38psi while running. cadalitic converter doenst appear to be plugged .getting spark to all cylinders checked at coil packs diagnostic meter read throttle position sesnor too low and maf/map sensor too low replaced throttle sensor and waiting on map sensor.cleaned maf sensor

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  • Pat Conrad Jul 08, 2008

    the engine does not have a egr valve or a map sensor

  • Pat Conrad Jul 09, 2008

    i ran a diagnostic meter on it and the only 2 codes i recieved were on the throttle position sensor and the map/maf sensor. i didnt believe it was the crank case sensor becuase when i pull the wires for that sensor, engine wont even try tyo start.

  • grayron Jul 21, 2008

    93 LaSabre, Stalls

  • Pat Conrad Oct 08, 2008

    fuel pressure is at 38 psi whilke running i cant see how this would be a fuel problem

  • ramdesign1 Nov 01, 2008

    how to remove heater fan

  • k_mesz Nov 27, 2008

    1989 buick century no spark at all

  • froonk Mar 15, 2009

    This is the exact same problem I am having right now.  Did anyone reach a solution?  I replaced one of the coils, because that was showing a misfire.  I also replaced the wires because they looked old.  The fuel pump is new, from a replaced fuel tank a year ago.  
    I hear a new clicking noise from what appears to be the throttle body area.
    This problem started last summer, then stopped for no real reason, then started back again recently for no clear reason again.  No check engine light.  190k miles. Thanks.

  • Anonymous Mar 14, 2014

    engine appears to have a miss at idle but as soon as you pick up the throttle the engine runs out good and smooth what do you think the problem is

  • Anonymous Mar 16, 2014

    tested map sensor output voltage was very low,vacuum had 16 inches and steady,replaced map sensor, veh idles very rough disconnect map sensor veh runs much better and throttles up nicely

  • Anonymous Mar 20, 2014

    I have a Nissan murano in my shop and it stalls shortly after starting. Like running out of gas. Disconnected MAF sensor and will run at idle. replaced sensor and went back to doing the same thing. I've checked all fuses and grounds and found no issue. I'm stumped. last week the converter was replaced because it was melted.

  • Anonymous Mar 29, 2014

    tries to start but doesn't sometimes starts but wont stay running unless you hold the gas peddle down. replaces map sensor

  • Anonymous Mar 29, 2014

    Tries to start but doesn't stay running. Had two codes MAf MAP sensor codes. replaces the MAp sensor
    . it still will not stay running.

  • Anonymous Mar 29, 2014

    engine misses bad sometimes seems like it is at its worse in the afternoons in the mornings it seems to run fine it also surges up and down sometimesw speeding up then slowing down . I have put new spark plugs in also coill packs new sparkplug boots fuel filter,throttle positioning module dont know what else to do.

  • Anonymous Mar 30, 2014

    stalls idles wayyy too high idle is not consistant and some of this started after new tcs idles rough

  • Anonymous Mar 31, 2014

    how to test sensor

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  • 148 Answers

Your on the right route but also check egr valve

Posted on Jul 07, 2008

  • derek martin Jul 09, 2008

    ok you want to check your crank sensor,it sends the signal to the ecm for the fuel ijection,then I would check the fuel injectors,you might have a failed injector,your best free bet is to go to a local autozone and theyll do a diagnostic check for free,all you have to do is ask,then from error codes go from there,its nice that your replacing all these parts but only replace if needed

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I did my own diagnostic meter on it and the only error codes i recieved were the throttle position sensor and the map/maf sensor

Posted on Jul 09, 2008

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I think the problem is probably the fuel pump. One way to test this is to take of the air cleaner and intake, and spray ether-based starter fluid into the throttle body through the metal grill that you will find when you take the air cleaner box off (1 phillips screw on top, and a 10mm head screw on the lower left of the box). While you're spraying, someone in the car should hold the throttle open (hold down the gas pedal) then let up off the gas when you're done (a good 15 second spray should do it, then step back) and try to start it. It will probably crank a couple of times, then start up (possibly with a flash and puff of white smoke, make sure you step back before they turn the key). The engine will run for a few seconds, and even rev up if you pump the gas pedal, then stall out and refuse to start again until you spray more starter fluid into it. Unfortunately, you have to pull the gas tank to change the fuel pump, because it is inside it.

Posted on Oct 05, 2008

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