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MAF needed for LPG powered WINDSOR??? 

 

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Posted: Wed Sep 17, 2008 12:43 pm 
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XH5LWEPN wrote:
raff-26 wrote:
XR9UTE wrote:
I'll be happy to take your advice on tyre shreading Raff :wink:


whats this supposed to mean exactly? I dont burn my tyres out- I have a fam and cant afford a new set every 2 weeks! Or do I sense Sarcasm??

Forget it XR9- Obviously you prefer belittling people who dont know as much as you , and frankly Its not very nice....Id like to think thats something Id be well over in my 40's. I'll just take it to a specialist and get it diagnosed.


OMFG!! Am i reading this right, what a joke!!!


OMFG :wink: YES u did read correctly XH5LWEPN!!!

Sorry XR9, I didn't know I had that tyre shredder thing there....i didn't put it there. can I make it go?

 

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Posted: Wed Sep 17, 2008 5:15 pm 
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raff-26 wrote:
XH5LWEPN wrote:
raff-26 wrote:
XR9UTE wrote:
I'll be happy to take your advice on tyre shreading Raff :wink:


whats this supposed to mean exactly? I dont burn my tyres out- I have a fam and cant afford a new set every 2 weeks! Or do I sense Sarcasm??

Forget it XR9- Obviously you prefer belittling people who dont know as much as you , and frankly Its not very nice....Id like to think thats something Id be well over in my 40's. I'll just take it to a specialist and get it diagnosed.


OMFG!! Am i reading this right, what a joke!!!


OMFG :wink: YES u did read correctly XH5LWEPN!!!

Sorry XR9, I didn't know I had that tyre shredder thing there....i didn't put it there. can I make it go?


Well s**t man I didn't put EFI guru there either! If I did I would be dissapointed if I didn't cop s**t all day long for saying nothing!?
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Posted: Wed Sep 17, 2008 10:42 pm 
Getting Side Ways
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Ok mate sorry, I didn't know u didn't put it there, like I did'nt know of mine!!! and I cant get rid of it...I thought it meant you were EFI specilaist..but hey thanks for your help anyway, now i took it for a hard drive and I see that it does not run anywhere near as good without the maf plug in...i will have it checked properly!
\
Sorry if I came across as a wank....not intentional!!! :?

 

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Posted: Wed Sep 17, 2008 11:23 pm 
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No worries Raff,
Just remember that quite alot can be lost in just typed words. I'm only trying to help.
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Posted: Fri Sep 19, 2008 10:15 pm 
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what if you got one of those hei distributors and have a seprate thing for ignition rather than using the ecu for igniton. then it wont matter if you dont have the maf. and get a gas research throtle body :)

just a sugestion
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Posted: Fri Sep 19, 2008 10:17 pm 
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apprently im an ompa lompa lol
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Posted: Wed Oct 08, 2008 1:40 am 
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Ok, I took the MAF plug out- and I have run it for a full tank of LPG- which returned 470k's out of 75 litres...so my economy is ok.

I drove it really hard, with no mercy at times and noticed NO difference what so ever it still pulls to the redline smoothly and trouble free ( as much as a stocky windsor will anyway :wink: )

So i come to the conclusion that obviously who ever installed my gas system before i bought the car has wired it to bypass the MAF I am sure of it....my economy is good, and just the other day i put a lead footed P plater in a AU ghia V8 on petrol to shame so i am assuming power is all ok-

Another question I have is if i take the MAF and airbox out and replace with a pod filter and fabricate a heat shield for it am I wasting my time?

People say due to the sprint gas mixer ring and MAF and throttle body opening being small and restrictive - theres no point but surely removing one or more of the restrictions will make some sort of difference??

:idea:

 

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Posted: Wed Oct 08, 2008 10:18 am 
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raffy, I can tell you with 99.99% certainty that whoever converted your Fairmont to LPG did not by pass the MAF. The computer that controls your LPG is for LPG fuel and not the ignition timing. It gets input from both your HEGOs, TPS and a ignition signal from the PIP. It will not control your timing, that is for your EECV. Now this may all sound like gobbly gook to you or perhaps you understand.

You have heard it from Pete, the guru on Ford EECIV ECUs. He said that your MAF also controls ignition timing. He knows his stuff.

At the end of the day, you have asked the question and it has been answered however you still continue to ask the question depsite the answers given. Rather than continue asking the same question, remove your MAF and do the pod in a box if it makes you happy.

 

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Posted: Thu Oct 09, 2008 12:23 am 
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Thanks Barnicle, I understand what you and the other guys are saying, I think I'll buy another MAF and see what happens...it has to be destroyed the car runs better on petrol also with it unplugged!!

 

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Posted: Sat Oct 11, 2008 4:53 am 
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I found this PDF on the web ,and found it to be interesting. It says the MAF (generically) also helps to determine transmission shifts?? Is this appropriate to Ford v8's?

http://www.autoshop101.com/forms/h34.pdf

I have a shift kit installed but the shift is fairly hard and confused at times - however unplug maf- and it seems to soften....I always thought MAF sensors were only for determining fuel injector pulse and air fuel mix (maf&o2) but maybe not....

I guess this is where my confusion lies- with the LPG system....ahhhh i wish i could be more tech minded I hate being confused!!!

I seen a new one on ebay I think i'll get this one....and see if my problems go!

http://cgi.ebay.com.au/GENUINE-AIR-FLOW ... 286.c0.m14

 

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Posted: Fri Oct 31, 2008 9:43 pm 
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The one thing I think everyone has missed is the point that LPG likes a flatter ignition timing map. A little more advance than petrol at low rpm, but a bit less advance at higher rpm.

Yes, unplugging the MAF alters the timing and makes it a much simpler and more conservative map, and if it was programmed with the ideal map for LPG rather than petrol I could understand the reasoning behind leaving it plugged in, but it's a petrol map which is not ideal for LPG anyway.

Having said all that, if it affects the auto's ability to sense engine load it's probably not a good idea.

I've tried the MAF vs unplugged MAF with LPG but mine's a manual so I noticed no adverse affects at all. But, as Barnicus says, the MAF is not a restriction because the mixer ring is smaller.

 

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