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fuel pump Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting ryder1954 New User Dec 1, 2007, 6:33 AM Post #1 of 5 (3344 views) fuel pump Sign In hi i have a 1996 gmc sonoma 4.3 engine. I would like to know if a 1995 gmc sonoma or a 1995 s10 with the same motor 4.3, will the feul pump out of one of those trucks fit in my 1996 sonoma,since they are the same motors.pleas help me can also email me at denis_rochon@xplornet.com thank you for reading this and hope to hear from you. DanD Veteran / Moderator Dec 1, 2007, 7:21 AM Post #2 of 5 (3337 views) Re: fuel pump Sign In I just looked up the specs between a 95 & 96 and they are slightly different. A 95 W code engine (Vortec) wants 55-61 psi, a Z code Engine (TBI Injection) wants 9-13 PSI; the 96 W code wants 60–66 psi, These Vortec engines are very fussy when it comes to the proper fuel pressure. I’ve seen a fuel pump only a pound or two shy of the minimum pressure rating and the engine not start. It’s because of the design of popit style injectors they used; it’s the fuel pressure that opens the injector, not an electrical solenoid like on an EFI system. These injectors are more like a diesel’s injectors. GM has brought out a retrofit multi port injection system to replace the popit design, but the cost of the retro is more in cost then replacing the fuel pump. I’ve converted a few vehicles when there’s been issues with the popet injectors that were sticking. Dan. Canadian "EH" ryder1954 New User Dec 4, 2007, 3:11 AM Post #3 of 5 (3327 views) Re: fuel pump Sign In thank you dan for your reponse.but i was wondering if i use just the motor alone from the 1995 to my 1996 and keep my same unit and reinstall it,would that work. DanD Veteran / Moderator Dec 4, 2007, 4:46 AM Post #4 of 5 (3325 views) Re: fuel pump Sign In The motor “pump” is what produces the pressure they are one in the same. Hanging the wrong motor on the proper sending unit; you’ll still have the wrong motor/pump. I don’t think you’ll have much luck trying to separate the electrical motor from the mechanical pump, they are stamped together during assembly. Here’s a picture of the pump and what you’ll find after taking the fuel pump/sending unit apart. Dan. Canadian "EH" ryder1954 New User Dec 4, 2007, 6:49 AM Post #5 of 5 (3319 views) Re: fuel pump Sign In thank you so much for your help it really feels good to know that somelse can help out.thank you again denis rochon from ontario canada   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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