1HD-FT fuel pump adjustments

Submitted: Monday, Apr 02, 2012 at 09:25

ThreadID: 92956 Views:7207 Replies:3 FollowUps:4

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120scruiser (NSW)

I have a 1996 model 80 series Landcruiser with the above engine and auto transmission.
I did the fuel pump adjustments as published on the lcool website.
http://www.lcool.org/technical/80_series/1hdft_pump_adj.html

After doing these adjustments I noticed my fuel economy dropped dramatically. Like up to 150km less in range over both fuel tanks.
Now I have had this vehicle for several years and the economy has never changed as has my driving conditions and style.
Luckily I marked all the adjustments prior to adjusting them so last week I put all the adjustments back to where they originally were and even though I have only done about 350 - 400km, the fuel economy is looking like it is back to where it used to be.

My question is has anybody here done the adjustments on their vehicle and had the same problem or done the adjustments and noticed no change in economy?

I will be leaving mine where it was as I didn't notice that much in a change of power off start.

Scott

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Reply By: hamo - Monday, Apr 02, 2012 at 13:38

Monday, Apr 02, 2012 at 13:38

Hi Scott
Ive got the same criuser,1hdft auto, 3" exh, safari intercooler, wholesale automatics upgrades (biggest waste of money was the upgrades to the auto).
I average 14lt-100 Best was 11lt-100, with a qiuck trip to swanhill & back.

Ive recently had my injectors & pump recoed & my fuel economy has stayed about the same But the power is now way up there & has no trouble towing my 3.5t van. Aveaged 18lt-100ks towing

The info (or lack of it) on the lcool site leave's a lot to be desired, What works for 1 doesnt nessaserly work for others.
Good you marked it & put it back to how it was.

To pre emt your next Q.
$4500 for reco pump & injectors
Cheers Hamo

AnswerID: 482159

Reply By: pop2jocem - Monday, Apr 02, 2012 at 20:11

Monday, Apr 02, 2012 at 20:11

Hi Scott,

What the guys on lcool are trying to achieve is better off the mark acceleration and I guess you are too. How many k's has your Cruiser done and have you ever had the injectors re-done. The injectors in these motors have a double spring setup that requires someone with a bit of experience to set correctly. If they are getting a bit tired all you are doing is dumping in more fuel for no gain. If you have not already done so make sure you have air and fuel filters in good condition. A lot of these mods seem to work better with bigger exhausts and turbo upgrades.

Cheers
Pop

AnswerID: 482189

Reply By: 120scruiser (NSW) - Monday, Apr 02, 2012 at 23:57

Monday, Apr 02, 2012 at 23:57

Thanks for the replies.
I average about 14 to 15 litres per 100 around town and the best I have got on a trip whilst driving miss daisy was just under 11.
I am a mechanic by trade so maintenance is not an issue with my old girl. She has done 325 000 km. The off the mark acceleration did possibly improve slightly however the adjustments were not for me so back to standard now and she can stay that way.
Thanks anyway
Scott

AnswerID: 482212

Follow Up By: Kimba10 - Tuesday, Apr 03, 2012 at 19:16

Tuesday, Apr 03, 2012 at 19:16

""driving miss daisy"" yeh write, Ive had trouble catching you along Mulgoa Rd and through Glenmore, lol. Only stiring you. There still a great vehicle I reckon, one of the best, never seen yours blowing any excess smoke or anything from behind so cant be tuned to badly........Cheers Steve

FollowupID: 757500