Question about 1997 GMC Jimmy
If the 8th letter of the VIN # is W which i bet it is than your fuel pressure is to low.
This engine uses a CPI unit to deliver fuel to the cylinders. The CPI unit consists of a central injector that feeds fuel to the poppet valve that are right above the intake valves. The poppet valves require high fuel pressure in order to open and deliver fuel to the cylinders at start up.
The reason why it starts and runs if you add a little gas through the throttle body is that once the vehicle is running the intake is under vacuum. The poppets can open with less fuel pressure in a vacuum. This is a real common scenario with these style injection systems.
A new good quality fuel pump (a/c delco or delphi are good pumps) and your fuel pressure should be back into spec of 58 psi or more and the vehicle should fire right up. Make sure you replace the fuel filter when you replace the pump.
Posted on Oct 17, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 22, 2015 | Cars & Trucks
Feb 07, 2013 | 1992 Chevrolet Lumina
Jul 12, 2011 | 1997 Chevrolet Tahoe
Mar 20, 2011 | 1999 GMC Jimmy
Oct 19, 2010 | 2000 GMC Jimmy
Nov 04, 2009 | 1998 GMC Jimmy
Apr 18, 2009 | 1996 Chevrolet Blazer
Mar 22, 2009 | 1998 Chevrolet S-10 Pickup
Mar 21, 2009 | 1987 Nissan Pickup
531 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: