L-jetronic

[WERNER_HAUSSMANN at HP-Loveland-om2.om.hp.com]

Item Subject: L-jetronic
Hi James

I'm new at this list, so I don't know if I should reply to each person, or 
send my reply to DIY_EFI.  I never did see my own message, so I don't know 
how everyone else saw it. Am I getting other peoples messages?


Anyway, James, you're not confused.  The my L-Jetronic does have an air 
meter.  It also has a lambda sensor. At 2/3 or more trottle a switch 
closes, and the lambda sensor circuit is disconnected, the mixture gets 
richer by about 4% for a little more power and knock protection.  Later ( 
oh.... about '86) the trottle switch was replaced with a vacuum switch to 
sense the manifold.  This way even when the trottle is opened only half way 
at low rpm, the vacuum drops, the switch closes and the mixture goes rich 
by ~4%.


James, thanks for the offer of the '79 Supra, but no. I have all the parts 
I need, except this vacuum switch to replace the switch on the trottle 
shaft.


The parts came from a '83 Renault Fuego. Most of the information came from 
the Bosch FI book ( I don't have the author handy) the the FI book by 
Hartman.  


Actual data is very hard to come by.  I had no luck getting data from 
Bosch.  If you need specifics I may be able to help.  But not much.



Werner







______________________________ Forward Header __________________________
Subject: Re: L-jetronic
Author:  Non-HP-james (james at brc.ubc.ca) at HP-ColSprings,mimegw2
Date:    3/4/96 4:21 PM




Werner, I thought that the L-jetronic (1979 and on) used an air flow 
meter, manifold vacuum to control A/F ratio????
The later LH-jetronic added and oxygen sensor.  Am I confused???

Anyway I have a friend with a '79 Toyota Supra that has died at my 
parents place.  I might be able to persuade him to part it out.  It has 
the LH-jetronic and except for a couple of fuel pressure hoses the system 
works fine.  Are you interested at all????  The car has blown a head 
gasket and thus he's got to tow it away to a wrecker and he'll probably 
get nothing for it.


Sorry Werner I forgot to ask you if your L-type was a speed 
density system???  Where did you get your parts from for the conversion 
(ie. what car that is?)   Do you have a good reference book that gives 
physical data on different sensors??  Like resistance of different coolant 
temp. sensors and whether they change their resistance in a  linear, 
geometric or logarithmic fashion????? 

Thanks in advance

jw