2000 buick regal 3800 engine -trouble


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Old 03-18-06, 08:10 AM
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2000 buick regal 3800 engine -trouble

my car stalls out and i have trouble starting it. smoke comes out of the exhast when i do get it started. i must hold the pedal down to keep it going of it will stall.
 
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Old 03-18-06, 10:05 AM
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What color is the smoke? How are the oil and coolant levels?
 
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Old 03-18-06, 11:23 AM
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Is engine light on if so any codes.
 
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Old 03-18-06, 03:42 PM
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flooring it causes it to go into "clear flood" mode wich shuts off the injectors. if the smoke is black or gray, id look at the fuel pressure regulator. its on the fule rail with the injectors and has a vacuum line hooked to it. unplug that vacuum line and see if gas comes out. if not these cars are pretty well know for some other problems also.
 
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Old 03-18-06, 03:56 PM
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Yes, these 3.8's are known for fuel pressure regulators going to hell. That is a great starting point.

As stated, check the coolant level. The upper intake gaskets fail on these engines also. It causes coolant to enter the cylinders and foul out the spark plugs. Cranking this over would build the amount of fuel in the cylinders. When the spark ignites the fuel, it will explode the upper intake manifold and possibly cause an engine compartment fire. We see a ton of these towed in. If the engine would begine to NOT crank over, the engine would be hydro-locked; cylinders would be full off coolant.
 
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Old 03-19-06, 10:29 AM
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If i let it set for a while it will start and i can drive it for a couple of minutes but then it starts to choke and it will not keep running. it will start but then stall . if i keep my foot on the pedal it will run but if i take it off it stalls. does this sound like coolant leaking into the cylinders?
 
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Old 03-19-06, 01:32 PM
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3.8`s

Two thing s came to mind. Fuel Pressure and Mass Air Flow [MAF]sq. black box. Should be on T/boy heald by 3 screws . undo and pick straight up do not invert it. Look for 2 wires on underside of sensor across tube. sprayoff to clean wires. Use brake clean myself. Again DO NOTInvert sensor. This has helped as well as fixed many a 3800 since they came out
 
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Old 03-19-06, 02:10 PM
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i had the codes checked and the guy said nothing showed up- - he said try the fuel filter or pump. what do you guys think of this? also i just drove it and i had to keep the pedal almost to the floor for it to move very slow. someone behind me said i had black smoke coming out of the exhaust with a little fire. any body have any ideas what this is?
 
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Old 03-19-06, 03:51 PM
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Did you do what wrenchpuller said to do, check fuel regulator and clean MAF, keeping running it that way and you will also need a new converter.
 
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Old 03-20-06, 04:44 AM
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when I disconnected the mass air flow to clean it i broke the positive wire. Is there a way to reconnect it without buying a new plug? Thank you for information on the mass air flow. I cleaned it and the car seems to be running good so far. thank you very much.
 

Last edited by jerry1967; 03-20-06 at 09:36 AM.
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Old 03-20-06, 12:03 PM
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if you broke the wire at the connector and there is enough wire left to resolder the wire back together then it can be repaired if not just buy another pigtail which is the connector and about 6 inches of wiring and you splice it in to your harness, by soldering the new pigtail onto your harness and use heatshrink tubing to insulate the solder connection.
if you broke anything on the sensor itself you will probably have to replace the sensor.
 
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Old 03-20-06, 03:45 PM
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thank you for your time. i did everything you said and now it ok- new mass air flow. solder the wires together but i just taped them with electrical tape, is that ok?
 
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Old 03-21-06, 03:33 AM
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electrical tape usually works ok for quite awhile, it doesnt seal out moisture as good as shrink tubing but you probably wont have any problems if you taped it up well.
 
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Old 03-21-06, 05:34 AM
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how does that shrink tubing work
 
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Old 03-21-06, 05:39 AM
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you apply heat to it and it shrinks you must put the tubing on the wire before you solder it back together then slide it over the soldered area and apply heat.
 
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Old 03-21-06, 11:10 AM
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thank you very much
 
 

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