|
Tractor Talk Discussion Board |
Re: OT, Chevy Lumina up and died!
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by KEB on April 28, 2006 at 07:41:56 from (192.31.106.34):
In Reply to: OT, Chevy Lumina up and died! posted by 1991 Lumina 3.1 on April 28, 2006 at 05:17:12:
Look in the manual, it should tell you how to connect a light bulb in place of the injectors so you can tell if the controller is trying to fire the injectors. I"ve also seen testers at auto parts chains to do the same thing - they"re basically a light bulb mounted in a connector that matches the connector on the injector. I had a 95 Chevy Astro one time that wouldn"t start unless you poured gas into the inlet, then would run perfectly once it started. Turned out to be a fitting on top of the in-tank fuel pump leaking. Found it by monitoring fuel pressure during cranking with a guage connected to the fuel rail test port. Injector pulse width is set to a fixed value during cranking, and then is determined by engine speed/load once it starts and the computer closes the control loop. In this case, there was enough pressure once it started that the computer could compensate by keeping the injectors open a little longer, but there wasn"t enough fuel pressure to start. But a cheap air conditioning pressure guage to check fuel pressure with. The fittings on the old R-12 systems are the same as the fuel rail schrader valve. Have you dumped the codes to see if the computer is showing some particular problem? Keith
Replies:
Home
| Forums
Today's Featured Article -
Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
... [Read Article]
Latest Ad:
18-32 Case Cross Motor
[More Ads]
Copyright © 1997-2025 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
