Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Tractor Talk Discussion Forum

Lumina update,,,

Welcome Guest, Log in or Register
Author 
1991 Lumina 3.1

05-03-2006 08:49:52




Report to Moderator

Nope, not running yet! After a new ECM, ign module, new fuel pump, filter, regulator, MAP sensor, coils, wires, plugs, to no result, it still wont start. The injectors dont pulsate, both wires test hot with a test light, when the engine cranks, the test light dims, but do not pulsate. 2 computers tried, 2 ign modules tried,, Ive had the crank postiton sensor out, and checked it out, its not damaged, the volt meter shows a trigger from it. That hooks directly to the ign module,,, has spark, has fuel pressure, now, there is a fuse box on the right fender,,, the ign circuit shows it hot when the key is in run,, when I hit the key to start,, those circuits go dead,,,, book says it should be hot when the switch is on, and in start position,, the power source comes from the alternator to the fuse block,, then the large wire goes to the starter with a fusable link,, if the fusable link blowed, or,, the alternator died in it,, could that kill the entire engine? I dont have the money to take it to a chevy garage, Ive got more time and a resource of junkyards to swap parts out,, If I can get it running, with all the parts I put on it, it should run lik a new one,,, if it ever fires back up! LOL! Thanks for any info,,, wife is not happy to ride in the old farm truck!! its too bad,,, I love that truck!! HAHAHA! HELP!

[Log in to Reply]   [No Email]
Rob Ray

05-03-2006 21:11:09




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
Hey Guy,

My Mom has one of these cars (with same engine), although it is a 1997 - Don't know if this will apply or not. When hers came up with a no start, I was sure it was the fuel pump since I could not hear it spinning up. Took it to mechanic - he said they were known for a firewall bulkhead electrical connector coming loose. He tightened it, and no more problems. Just something you can check or try and no more money out. Good luck,

Rob

[Log in to Reply]  [No Email]
noncompos

05-03-2006 11:59:26




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
If you have access to a friendly mechanic, have him run the TSB"s for your problem; they sometimes cover stuff that showed up after the manuals were written. If you"re really lucky he, or his shop, might belong to IATA, and he could check for your problem with them as well (if he gets his TSBs from Alldata, the joke is that Alldata really doesn"t always have "all the data"...). With sympathy, Bud

[Log in to Reply]  [No Email]
ucasss

05-03-2006 11:56:00




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
ive had crank position sensors on gm test good off the car,but wouldnt work on the car.. lucas



[Log in to Reply]  [No Email]
bradk

05-03-2006 11:52:07




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
You mean you didn't check the injectors w/instructions I gave you from the last post?You're making more problems for yourself!YES 1 bad injector can shut down the ECM as a fail-safe for the solid-state electronics.~brad



[Log in to Reply]  [No Email]
Mr. Bill No. Mn.

05-03-2006 10:47:30




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
I had a chevy that did that and it turned out to be an enursha(sp) swithc thats suppose to shut the engine down if hit from behind or in and accident. Mine was a little black box located just above the gas pedal . Had a little white reset button on top that you push down to reset. Wasn"t in an accident but it tripped anyway. Reset it and it ran perfect. Just a thought.-Bill P S Some cars have them located behind the side panel on the pass side or in the trunk.

[Log in to Reply]  [No Email]
RusselAZ

05-03-2006 09:46:53




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
It has a bad injector in it. OHM all of them individually. It only takes one with to high OHM's or shorted to ground to make the ECM not pulse them. Using a test light on the computer signal side of the injector harness will cause the same thing. THats why digital meters are made.



[Log in to Reply]  [No Email]
Bob

05-03-2006 09:54:41




Report to Moderator
 Re: Lumina update,,, in reply to RusselAZ, 05-03-2006 09:46:53  
Good point, Russel. Are these amongst the GM's with the corporate injectors that like to short?

What is your take on what he is seeing with the circuits labelled "run" that are powering down during cranking... normal, or not?



[Log in to Reply]  [No Email]
Glenn F.

05-03-2006 09:33:33




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
It might be easier to just get a new wife.



[Log in to Reply]  [No Email]
Bob

05-03-2006 09:16:07




Report to Moderator
 Re: Lumina update,,, in reply to 1991 Lumina 3.1, 05-03-2006 08:49:52  
Some thoughts... try at your own risk...

Run a jumper wire to the "run" circuit that goes dead when you turn the key to "crank", so the jumper keeps that circuit powered up... does it start now? (SHOULD be no harm in doing that... it's essentially what an "add-on" remote start unit does.) If it starts while jumpered. it COULD mean a bad ignition switch that won't keep the engine electricals powered up while cranking.

I just finished repairing a 1985 Mazda with the opposite problem... It had ignition and fuel injection while cranking, and would "die" when the key was allowed to return to "RUN". A new ignition switch fixed that.

If the above doesn't help, some other thoughts...

One side of the injectors will be powered to battery voltage. The 'puter grounds the other injector terminal each time injection is required, and keeps it grounded for a fraction of a second. The LENGTH of time the 'puter keeps it grounded determines fuel rate by controlling injector "duty cycle". A broken wire or bad connection between the 'puter and the injectors will keep the 'puter from activating them. Also, suspect a bad ground. There are 'puter ground wires coming out of the engine harness that attach to the block, and various ground straps, etc., from the battery, to the engine, to the body.

Try "powering up" that "run" circuit, and see if it starts, and post back!

[Log in to Reply]  [No Email]
Lumina 3.1

05-03-2006 10:33:12




Report to Moderator
 Re: Lumina update,,, in reply to Bob, 05-03-2006 09:16:07  
Tried that,, When the key is shut off, and run the jumper, it will lightly spark when the wire is touched to the terminals. When the key is on, it dont, nor it did not start. Sometimes, it will fire,,, thats if I short duty the key switch,, Instead of holding the start for a longer period of time to crank,, I will just barely hit the start and it would fire a few times and then,, after a few more times of doing this, it will go right back to doing nothing but crank over. Never thought of one injector being bad the whole setup wont work,,, Ill have a look at that. Bout the only part I havent replaced is the injectors, and the TPS sensor. Everything else has been swapped out, or new parts installed. NO trouble codes what so ever,,, Ill have a look at the key switch too,,, Thanks!

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 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 Headquarters

Website Accessibility Policy