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02-28-11 06:31 PM - Post#2053697. This guide is for troubleshooting EGR problems on TBI engines (1987-1995) using a negative pressure (vacuum-operated) valve, which are the majority of the TBI 5.0 and 5.7 truck engines. If in doubt, check the part number on the valve, it should end with an "N" for negative. This is
AutoZone Repair Guide for your Engine Performance And Tune-up Idle Speed And Mixture Adjustments Throttle Body Injection (tbi) Chevrolet Full Size Cars 1979-1989. MINIMUM If all other components of the fuel system are working properly and there is still a problem with the idle speed, the screw may be adjusted.
AutoZone Repair Guide for your Driveability & Emissions Controls Electronic Engine Control Systems Throttle Body Fuel Injection (tbi)
This page is dedicated to the owners of these vehicles equipped with GM's dual point fuel injection (model 220 TBI). with TBI in 1987, this changed very rapidly in 1988 when it was introduced on the F bodies (Camaro and Firebird) and expanded to include the Chevrolet Caprice, Monte Carlo See troubleshooting page.
13 May 2012
Troubleshooting. I have decided to create a page on trouble shooting TBI. Works with any fuel injection really since most shops really can't properly diagnose unless computer just tells them what is wrong and unfortunately with TBI that usually doesn't happen. What people like about TBI is its simplicity with only a few
You may have your MAP sensor connected to a ported vacuum source and not full manifold vacuum. You may have a vacuum leak causing low engine vacuum to the MAP sensor. Your fuel pressure is not set properly or your fuel return line is restricted. On a TBI system your base gasket may be the wrong size or not sealed
1 Sep 2012
Consult a service manual or see below for any check engine light code definitions. You can use a late 80's or early 90's GM. TBI definition. If you have access to a scan tool use a hook up for a 1990 350 cu. in. 5.7L. Chevrolet truck. For some scan tools enter VIN 10th “L" 3rd “C" 8th “K". If you have installed a Fuel Injection
The throttle body in a car provides the control of air and fuel injection so that the system runs efficiently and does not backflow. When this automotive part is not working correctly, or its electronic sensors begin firing off readings to the onboard diagnostic computer showing problems, it can create car problems.

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March 2018