Question about 1993 GMC Sierra

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My 1993 GMC Sierra wont start it will turn over but not start i sprayed carb cleaner in the carb and it started for just a second the died.

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Sounds like you have a bad fuel pump which is in the fuel tank

Posted on Jan 31, 2010

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That test generally confirms that you aren't getting fuel to the engine. WD 40 can also be sprayed into the intake while cranking & many vehicles that are only missing fuel, will run (barely sometimes) as long as you continue to spray a little at a time. You'll need to make sure there is plenty of gas in the tank, & get your fuel pump tested & probably replaced. good luck

Posted on Jan 31, 2010

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If you have no power, check battery may need to be jump started. If you have power, and car doesn't turn over. may need a starter or battery or new terminals. If car turns over just will not come start then you should test your fuel pump. DO this by spraying a little starting fluid or gas or carb cleaner down your throttle and have some one try to start the car... if it starts for a second or two and dies then u need a fuel pump which should be located in your gas tank at the sending unit.

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I have a 1993 jeep grand cherokee with a staight six , automatic trans,, it starts just fine but when you put it in gear whether it is reverse or drive , it will just die and before it will start back you...


another case of probable dirty throttle body. those 4.0 liters get real dirty in the throttle body. take off the air tube and spray carb cleaner down the bore and squirt that smaller hole the dtepper motor is in. get your tooth brush and open throttle by hand scrub away all that black goo in the bore and on the plat rinse with more spray untill sparkling. put together start. it will spuuter a bit cause of cleaner,

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simpler that exposing the throttle body just depress the accelerator 3/4 and try to start.

If like before, the vehicle starts... watch the rear view mirror for black smoke

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Has spark has gas wont start


You may have weak fuel pressure. These trucks are critical that the pressure be accurate. 1 psi low will cause a no start. Spray some brake cleaner or carb cleaner in the throttle to see if it will start. If it does then you have a fuel issue.

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good job. There are two sensors you need to be aware in the air intake. the first is the MAF (mass air flow) this reads the amount of air coming, so the engine can adjust the amount of fuel to mix. The other is the IAC (intake air control temperture), which reads the temp of the air coming in the intake to the throttle body.

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need more info on motor is it carberated / tbi check for spark at plugs for good spark 3 thing to a motoor to run fuel spark an compression i start with sprk then fuel then compresion one is the problem first pull a plug wire from plug insert screw driver hold on to inslated handle an place super close almost touching a ground an crank engine if ya got good spark pull a plug an insert it in wire hold to ground mind to keep your self insulated could shock you still good spark then go to carb remove air cleaner look down throat of carb an manualy pump throttle by turninig linkage if it sprays well your getting fuel so if ya have good spark an good fuel an still wont run do a compression test no or low compression will not let it start lot of time its just a plugged fuel filter otr a bad cap an rotor sometime yourl coil could be bad not likley thuogh if it pops or back fiires ti may have jumped time if so unless your a grease monkey take it to a shop good luck

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