Re: Electronic to Mechanical Pump

Posted by jdemaris on April 04, 2006 at 06:04:15 from (69.67.229.89):

In Reply to: Re: Electronic to Mechanical Pump posted by Bob on April 03, 2006 at 19:31:30:

A few agreements and disagreements with what you stated.
In reference to many pumps and other parts being changed when not necessary - that's absolutely true and it also applies to the older GM diesels dating back to 82. I've seen many complete engines get condemned and removed when there was nothing wrong with them. I'm still driving a few. In slight defense of GM though, when they first started having the problems with the Stanadyne/Roosamaster DS4 fuel systems - dealers were doing complete replacements on the recommendation of Stanadyne. Seems, at first, Stanadyne did not know how to fix the system they created.
In regard to the electronic system providing better fuel mileage and cold-starting, I've seen little evidence of that. With cold-starting - what HAS happened is more consistent quality-control throughout. With the older diesels - car, truck, and farm tractor - there was a wide set of tolerances - plus or minus that applied to many individual parts or systems on engines. So, it was a crap-shoot. I've got two 82 GM 6.2 diesels and an 85 Ford 6.9 diesel that start amazingly well when cold - absolutely as good if not better than any new truck on the market. I've also got an 83, 87, and 91 that have been poor starters since new. John Deere had the same problems with inconsistency up to their 50 series of Ag. tractors.
And - fuel mileage? I've got an 82 1/2 ton 4WD that gets 24 MPG on the highway, and an 83 2WD that gets 26 MPG. My neighbor recently tried to upgrade from his 91 Dodge 3/4 ton 4WD with 5.9 Cummins - that gets a consistent 18 MPG on the highway. He just bought a new GM 3/4 ton 4WD with the Japanese Power-Max diesel and the best he can get is 14 MPG on the same highway trip. My 94 Ford 3/4 ton 4WD turbo 7.3 IDI gets 21 MPG on the same trip (all mechanical injection).
And with lighter vehicles? Jeep now has a turbo-2.8L diesel in their Liberty and fuel mileage is not impressive for a vehicle that small at 26 MPG. I had an 86 Isuzu Trooper 4WD with an Isuzu turbo-diesel and it consistently got 30 MPG on the highway - and no electronics. My wife's 91 Volkswagen Jetta diesel gets a consistent 51 MPG on the highway. My son has a 2003 Jetta diesel with electronic controls that gets 45 MPG.
I'm not saying that there aren't any newer diesel trucks with decent mileage - but on the average - there is NO benefit in fuel-mileage or cold-starting because of the electronic emmisions-based controls.

Replies:

• Re: Electronic to Mechanical Pump RodInNS 10:56:58 04/04/06 (3)
  • Re: Electronic to Mechanical Pump jdemaris 11:32:44 04/04/06 (2)
    • Re: Electronic to Mechanical Pump RodInNS 15:17:47 04/04/06 (1)
      • Re: Electronic to Mechanical Pump jdemaris 20:08:02 04/04/06 (0)
• Re: Electronic to Mechanical Pump Mike M 07:03:37 04/04/06 (5)
  • Re: Electronic to Mechanical Pump jdemaris 07:19:32 04/04/06 (4)
    • Re: Electronic to Mechanical Pump buickanddeere 13:40:23 04/04/06 (1)
      • Re: Electronic to Mechanical Pump jdemarisj 20:15:31 04/04/06 (0)
    • Re: Electronic to Mechanical Pump Mike M 09:24:25 04/04/06 (1)
      • Re: Electronic to Mechanical Pump jdemaris 09:38:41 04/04/06 (0)

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

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 ]