Thank you for allowing me in this site , Is there any way of telling if my fuel pump is single , double vent atc , prior to removal of tank , (for ordering purposes )


Thanks
makeminelgd

 

is it a 4x4.and a 4 door?? what vin?....

 

Bernard , It is a Tahoe LT , 4dr 6 cyl 4.3 Vin IGNDT13W8P2176315. i DID INSTALL A NEW FUEL PUMP , AND IT WORKS FINE , NOT SURE OF PRESSURE THOUGH , STILL NO GO . Thanks

 

Ok, However we probably need to know what kind of symptoms you are having to help you properly but for now you may can start here. However, You "REALLY" need to check your pressures. At intake it should be around 55-60 psi and hold after turning off ignition. If not then you have to check regulator inside intake or injector leaking by. Lots of stuff it could be but must start with pressure check. I even had the parts store give me the wrong pump once and had to do it twice because of it. They give me a pump for a tbi instead of the cpi that the W in the vin number indicates. The tbi requires a lower psi for the injector. But yours and mine have the W in the vin at the 8th digit which indicates cpi. You can usually rent a pressure gauge at a local parts store to check the pressure the spot to check is on the driver side of the intake where the fuel lines come in at next to the firewall.

 

Thanks Muddigger , I can not find the pressure valve (schrader) I have purchased a Haynes manuel for my model , it shows location , but Ill be damed if I can find it . Is it possible it could be in a different location ?

 

shrader valve is located on the back of the intake plenum on the drivers side, covered with either a black or blue nipple, wont be in any other location. its tucked down there covered usually with the spark plug wires, so its kinda hard to see.

 

OK richphotos. Off I go to begin the search . I appreciate all the post that are trying to assist me . You folks are superb !

 

Hi , just a quick note to let you know that I FOUND THE VALVE , it was right where richphotos said , THKS rich . Now , i am just trying to rent a pressure tester , out of all 4 rental firms in this town , there is none avail, cant believe it , anyone know where i can find at a decent price , I dont mind buying , and then I will loan / rent out . LOL .Again Thank you so much richphotos . Am I correct in thinking there should be about 50-55 lbs and hold that , also what would be the next step if there is good pressure ?