Question about Cars & Trucks
Fuel pump driver module . The fuel pump is controlled by the computers . Fuel rail pressure sensor is an input to the PCM - engine computer , the PCM sends message to the fuel pump driver module , the FPDM controls the fuel pump by PWM - pulse width modulation .
Ford Electronic Returnless Fuel System Diagnosis Part 1 Ford
Taking your vehicle to a qualified repair shop ,dealer .
Posted on Dec 30, 2017
SOURCE: car runs rough at idle
clean out ur throttle body, just follow the hose from the air filter to the throttle body. Need 2 people to do this. Don't remove the hose completely from the throttle body. Just enuff to be able to spray ur intake cleaner into the throttle body. Do this especially if its worse when the motor is hot, as this would confirm the problem.
Posted on Sep 04, 2008
SOURCE: 1991 geo storm stalling at idle
maybe try replaceing the ingnition modual. that part can do a lot of weird things to these cars. its located inside the distributor cap, really easy to do. about $40 and 10 mins or less. sometimes as they start to fail they do odd things sometimes but not always
Posted on Mar 18, 2009
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
Posted on Jun 06, 2009
maybe your iac valve is not working? it takes place of a choke or temp sender to computer could be bad which controls t I.A.C. known as the idle control valve,do you have any codes?
Posted on Sep 01, 2009
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