Question about 1990 Chevrolet K1500
You should look for trouble codes first and address what you find (OBD-I--you can ground the (proper) ALDL (assembly line data link) terminal and count the blinks--if that's too complex, consult a mechanic). Sometimes the TPS (throttle position sensor) will act as you described it without generating a trouble code. A clogged fuel filter or bad fuel pump can also be a cause but usually won't 'spit and sputter...At home, without an OBD-I scanner, you will need to ground the appropriate leads on the ALDL, count the blinks and interpret them. If you can't do that, consult a mechanic. Check the TPS.
Posted on Apr 09, 2015
FUEL PRESSURE MUST BE IN THE 35-45 LB RANGE TO OPERATE PROPERLY. CHECK YOUR FUEL PRESSURE AND THEN FUEL QUANTITY BEING DELIVERED. YOU MAY HAVE A FAULTY FUEL PUMP WHICH IS VERY COMMON
Posted on Apr 09, 2015
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Posted on Jan 02, 2017
Have you changed the fuel pump yet?I had the same exact problem.I replaced my fuel pump with an AUTOZONE PIECE OF JUNK fuel pump.That pump lasted almost 2 days.The second day i had it the truck didnt want to start but it did and it ran like ****,and when i put it in gear it ran as long as I didnt touch that gas pedal.You could go get a fuel pressure test or just replace it,your call.You might want to check your filter too but im sure its the pump.Good luck
Posted on Apr 27, 2009
Put an injector noid light at the injector plug terminals to see if your getting a signal from the PCM(computer).If not try to find a computer from the same vehicle that works and swap it into yours to check.A PCM swap will take about 15minutes.
Posted on Sep 23, 2009
SOURCE: wont start
Check to see if you have spark You may want to try the crank sensor located near the crankshaft, with this sensor malfunctioning you will lose spark.
this will test your pump.... make sure your getting 40-60psi at the fuel rail even when you cycle the key on and then off it should have pressure, located in line with your fuel injectors has a plastic cap on it kinda looks like a tire valve.
Posted on Apr 16, 2010
Not much else it could be you have renewed just about everything. How about the coil sets? How healthy do the sparks look? try swapping some the faulty cylinder coils around with those that are good and noting the shift in misfires. The coils get hot and suffer over time. I think if you examine the sparks from each plug in turn you will see big differences from good to poor. For safety disconnect the fuel pump relay when checking the spark we don't want any fires.
Posted on Sep 18, 2010
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