5.7l vortec
#1
![Default](/forum/images/icons/icon1.gif)
1999 chevy tahoe 5.7L
ALL NEW BELOW-
THROTTLE SENSOR
FUEL PRESSURE 60-65
NEW CAP & ROTOR
PLUGS N WIRES
FUEL FILTER
KNOCK SENSOR
ONLY WHEN HOT I HAVE NO POWER. I HAVE TOI FEATHER THE GAS JUST TO MOVE. AT 65 ON THE HIGH WAY IF I GO TO PASS AS SOON AS IT SHIFTS DOWN IT BOGS DOWN AND LOOSES ALL SPEED AND AGAIN I HAVE TO FEATHER THE GAS TO GET GOING. ANYTHING MORE THAN 5% OF THE PEDAL AND IT BOGS DOWN.
AGAIN ONLY WHEN ITS RAN FOR AWHILE THIS OCCURS...WHILE COLD IT RUNS PERFECT.
AT A TOTAL LOSS NOW!!!
ALL NEW BELOW-
THROTTLE SENSOR
FUEL PRESSURE 60-65
NEW CAP & ROTOR
PLUGS N WIRES
FUEL FILTER
KNOCK SENSOR
ONLY WHEN HOT I HAVE NO POWER. I HAVE TOI FEATHER THE GAS JUST TO MOVE. AT 65 ON THE HIGH WAY IF I GO TO PASS AS SOON AS IT SHIFTS DOWN IT BOGS DOWN AND LOOSES ALL SPEED AND AGAIN I HAVE TO FEATHER THE GAS TO GET GOING. ANYTHING MORE THAN 5% OF THE PEDAL AND IT BOGS DOWN.
AGAIN ONLY WHEN ITS RAN FOR AWHILE THIS OCCURS...WHILE COLD IT RUNS PERFECT.
AT A TOTAL LOSS NOW!!!
#3
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Something else you may want to check, especially of a vehicle of that age is the vacuum hoses going to the throttle body.
I had a similar issue on my 94, and new hoses helped a lot.
Also check the injectors for proper spray pattern. They may need cleaning.
I had a similar issue on my 94, and new hoses helped a lot.
Also check the injectors for proper spray pattern. They may need cleaning.