Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
can you tell me what model , engine size and fuel type this is please?
also how many miles are on the vehicle and when it was last serviced
OK as you've had issues with the throttle I'd next remove the intake hose again and with the ignition on / engine off and then have your assistant press the accelerator down slowly, whilst you watch
the throttle should open smoothly with no jerks or hesitation if it does then check the wiring and connector for damage and corrosion
and if thats OK then consider replacing the pedal sensor
if all of this is OK then I'd move onto checking for fuel pressure from the electrical pump at the tank.
If the connections to the pump are corroded or damaged then the pump could stop at any time or could notbe running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,
Ideally measure the pressure at the injectors and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.
do you still need help?
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