replacing a c-4 fuel pump

grumpyvette

Administrator
Staff member
IF YOUR LOOKING TO JUST REPLACE A DEFECTIVE PUMP ILL OUTLINE THE BASIC STEPS

its not necessary to drain the tank but its a good idea to do so,
step one have the parts on hand PLUS 3 ft of 3/8" fuel line and 1 ft of 5/16" fuel line , I know, you may not need the fuel line but in many cases its faster and easier to remove the old line and replace with new ones
hose clamps, youll want several 1/2" size for the lines
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fuel pump
http://www.ecklers.com/product.asp?pf_id=30666&dept_id=1277


fuel pump screen
http://www.ecklers.com/product.asp?pf_id=30668&dept_id=1277


fuel filter
http://www.ecklers.com/product.asp?pf_id=A3479&dept_id=1303
(optional but a GREAT IDEA)

ok, step one,
make darn sure the keys are out of the car and the battery is disconnected for extra safety

step two, open the fuel fill door center rear deck where you normally fill the car and remove the gas cap

step three
remove the four very small torx screws in the corners and lift off the door assembly

step four
theres a rubber bib fuel spill tray)(around the fill spout, remove the gas cap and work the bib fuel spill tray ) (out , and disconnect the water drain line and label it with masking tape/pen

step five
label the three lines with masking tape/pen (upper line/lower line /left side line)
remove each at the central point in the opening, then disconnect the electrical connector on the lower edge of the opening

step six
remove the 8 10mm bolts and look carefully at where the components go, after they are removed the pump lifts up and out, the pump normally comes with instructions also, but its fairly simple, the pump, lines and fuel level sensor lifts out as a sub assembly, look thru the link below for pictures and more info



the oil pressure switch might be defective, if the fuel pump won,t run, even if its new
and at $11-$35 Id just swap it out if your concerned

41011.jpg

http://www.ecklers.com/product.asp?pf_i ... ept_id=153
39451.jpg

http://www.ecklers.com/product.asp?pf_i ... ept_id=153

the single terminal sensor runs the oil gauge the dual connector runs the fuel pump ONCE theres about 5 psi of oil pressure but they do fail and they do leak oil when they fail and both are commonly located near the distributor


NOW IF YOU WANT TOO UPGRADE HERES A MORE USEFUL LINK WITH PART NUMBERS

http://www.caspeed.com/boschpump/boschpump.html

similar thread

http://www.digitalcorvettes.com/forums/showthread.php?t=92123
 
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