Huntley ARC2 fuel controller?
12-12-2002, 01:15 AM
#31
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Wait a minute.
If i did have a blown headgasket wher oil was leaking into my exhaust. Wouldnt that do it ALL the time. Not just when I come to idle.
Take for instance today. I used my turbo. About 14 psi worth. When I came to idle. There was absolutely no smoke and the temperature outside was warm.
But when I dont use my turbo and the temperature going into the Huntley MAF is cooled, then it starts smoking. So couldnt it be the MAF that is acting weird.
Please Reply.
Justin
If i did have a blown headgasket wher oil was leaking into my exhaust. Wouldnt that do it ALL the time. Not just when I come to idle.
Take for instance today. I used my turbo. About 14 psi worth. When I came to idle. There was absolutely no smoke and the temperature outside was warm.
But when I dont use my turbo and the temperature going into the Huntley MAF is cooled, then it starts smoking. So couldnt it be the MAF that is acting weird.
Please Reply.
Justin
12-12-2002, 04:45 AM
#32
Race Director
"BTW, Danno, Marren Motorsport told me that my injectors are rated at 52 lb/hr (2.5 ohm), but the Motec catalogue rates them at 50 lb/hr (Bosch M0280 403). I asked you to set those chips up for 52 lb/hr at 3 bar, hopefully that's right."
Ian, I think those are 47.9-49.3#/hr injectors depending upon the source:
<a href="http://www.gnttype.org/techarea/fuelsystem/injflow.html" target="_blank">http://www.gnttype.org/techarea/fuelsystem/injflow.html</a>
<a href="http://www.autospeed.com/A_0102/article.html" target="_blank">www.autospeed.com/A_0102/article.html</a>
<a href="http://autos.groups.yahoo.com/group/megasquirt/files/article0102.pdf" target="_blank">http://autos.groups.yahoo.com/group/megasquirt/files/article0102.pdf</a>
<a href="http://users.erols.com/srweiss/tableifc.htm" target="_blank">http://users.erols.com/srweiss/tableifc.htm</a>
<a href="http://www.telusplanet.net/~chichm/tech/injectors.pdf" target="_blank">http://www.telusplanet.net/~chichm/tech/injectors.pdf</a>
<a href="http://www.diy-efi.org/gmecm/html_archives/archive_num_3/msg00225.html" target="_blank">http://www.diy-efi.org/gmecm/html_archives/archive_num_3/msg00225.html</a>
<a href="http://www.home.earthlink.net/~rotaryeng/injector-table2.txt" target="_blank">http://www.home.earthlink.net/~rotaryeng/injector-table2.txt</a>
So I'll set up your chips for 48.5-lb/hr injectors at 3-bar fuel-pressure. You'll also have options for stock 34.6-lb/hr and 65/75-lb/hr injectors as well.
Porschemam101: On the smoking-at-idle issue, I just realized something. The vacuum line going to the FPR actually REDUCES fuel-pressure when you're under vacuum and idle. So with the hose disconnected, you would see 36.3psi @ idle and about 31-32psi with the vacuum connected. If you were to have a vacuum leak in this line somewhere between the FPR and intake-manifold banjob-bolt (between #3&4 runners), you would be reducing fuel-pressure insufficiently, thus a rich idle. Or if any of the other vacuum lines that branches off from that banjo-bolt can cause a leak as well.
While this idle-richness may be annoying, it's not that harmful. But even more problematic would be INSUFFICIENT FUEL-PRESSURE when you're under boost! By having a leak, you won't be raising fuel-pressure to keep up with boost. Thus, you'll be running lean under boost conditions.
So I'd check the vacuum you have at idle at the little hose going into the FPR. You should be seeing about 10-in.Hg at idle.
Then to answer the fuel vs. coolant question, what does the smoke smell like? If it's light and aromatic (like perfume), then it's gas. If it's heavy and sweet, that's coolant.
Ian, I think those are 47.9-49.3#/hr injectors depending upon the source:
<a href="http://www.gnttype.org/techarea/fuelsystem/injflow.html" target="_blank">http://www.gnttype.org/techarea/fuelsystem/injflow.html</a>
<a href="http://www.autospeed.com/A_0102/article.html" target="_blank">www.autospeed.com/A_0102/article.html</a>
<a href="http://autos.groups.yahoo.com/group/megasquirt/files/article0102.pdf" target="_blank">http://autos.groups.yahoo.com/group/megasquirt/files/article0102.pdf</a>
<a href="http://users.erols.com/srweiss/tableifc.htm" target="_blank">http://users.erols.com/srweiss/tableifc.htm</a>
<a href="http://www.telusplanet.net/~chichm/tech/injectors.pdf" target="_blank">http://www.telusplanet.net/~chichm/tech/injectors.pdf</a>
<a href="http://www.diy-efi.org/gmecm/html_archives/archive_num_3/msg00225.html" target="_blank">http://www.diy-efi.org/gmecm/html_archives/archive_num_3/msg00225.html</a>
<a href="http://www.home.earthlink.net/~rotaryeng/injector-table2.txt" target="_blank">http://www.home.earthlink.net/~rotaryeng/injector-table2.txt</a>
So I'll set up your chips for 48.5-lb/hr injectors at 3-bar fuel-pressure. You'll also have options for stock 34.6-lb/hr and 65/75-lb/hr injectors as well.
Porschemam101: On the smoking-at-idle issue, I just realized something. The vacuum line going to the FPR actually REDUCES fuel-pressure when you're under vacuum and idle. So with the hose disconnected, you would see 36.3psi @ idle and about 31-32psi with the vacuum connected. If you were to have a vacuum leak in this line somewhere between the FPR and intake-manifold banjob-bolt (between #3&4 runners), you would be reducing fuel-pressure insufficiently, thus a rich idle. Or if any of the other vacuum lines that branches off from that banjo-bolt can cause a leak as well.
While this idle-richness may be annoying, it's not that harmful. But even more problematic would be INSUFFICIENT FUEL-PRESSURE when you're under boost! By having a leak, you won't be raising fuel-pressure to keep up with boost. Thus, you'll be running lean under boost conditions.
So I'd check the vacuum you have at idle at the little hose going into the FPR. You should be seeing about 10-in.Hg at idle.
Then to answer the fuel vs. coolant question, what does the smoke smell like? If it's light and aromatic (like perfume), then it's gas. If it's heavy and sweet, that's coolant.
12-12-2002, 12:37 PM
#33
Danno - Marren Motorsport gave me a print-out sheet showing the flow characteristics of each of my injectors. It's at home. I'll have a look at it tonight, and then tell you exactly what the deal is with them. BTW - all of those links but one you provided showed my injectors to be rated at 503 cc/min @ 3 bar, or 49.3 lb/hr. That seems like the number to go with, rather than 48.5.
12-12-2002, 12:42 PM
#34
Rennlist Member
Porscheman,
My car did exactly as you car does when I added my 55 # injectors. See my post above. We need more information about your setup. What is your fuel pressure, arc2 setting, and what type of injectors do you have? When my white smoke billowed out at idle, my ARM1 would dither stoich. The raw fuel registers as lean!! To make sure I had no other problems like a headgasket failure, I replaced the stock injectors and had no white smoke. The car was fine. It was clearly a problem related to the control of the big injectors. Let us know you setup, and we will make some suggestions to tweak it.
My car did exactly as you car does when I added my 55 # injectors. See my post above. We need more information about your setup. What is your fuel pressure, arc2 setting, and what type of injectors do you have? When my white smoke billowed out at idle, my ARM1 would dither stoich. The raw fuel registers as lean!! To make sure I had no other problems like a headgasket failure, I replaced the stock injectors and had no white smoke. The car was fine. It was clearly a problem related to the control of the big injectors. Let us know you setup, and we will make some suggestions to tweak it.
12-12-2002, 06:50 PM
#35
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Allright. I took my car to the mechanic today. I was going to take it in because I was going to have him remove my wastegate. But I ended up taking it there for my wastegate and for the smoke. When I pulled up to the shop, smoke started billowing out of my exhaust. He smelled it and said it was oil. He is running a compression ratio, cylinder leak test ect.....
He said it could be the turbo seals. I said owwwww. The turbo! Why didnt i think of that.
As for my setup, I have Stage 3 MAF, europroducts chips, lindsey boost enhancer, and ignition, and soon wastegat shims. I will look forward to hearing what my mechanic has to say.
If it is the oil, then i guese i will just have to see how the MAF works after. Will keep forum updated. <img src="graemlins/drink.gif" border="0" alt="[cherrsagai]" />
Justin
He said it could be the turbo seals. I said owwwww. The turbo! Why didnt i think of that.
As for my setup, I have Stage 3 MAF, europroducts chips, lindsey boost enhancer, and ignition, and soon wastegat shims. I will look forward to hearing what my mechanic has to say.
If it is the oil, then i guese i will just have to see how the MAF works after. Will keep forum updated. <img src="graemlins/drink.gif" border="0" alt="[cherrsagai]" />
Justin
12-13-2002, 01:52 AM
#37
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I personally had every bad symptom of the maf kit appear at one time or another, they all can be eliminated except the fuel adj. for cold engine starts, ie no adjusting temp. sensor anymore, but i never had a smoking issue, even when i went full lean or rich at idle, the arc2 only adds or subtracts max of 20% more fuel total above whatever chip your using, it would be hard to add enough fuel to cause heavy smoking
12-14-2002, 04:16 PM
#39
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Allright, I just heard back from my mechanic. He said that my compression was a perfect 150 across the board. However he feels that it is my turbo seals that went bad. Would this cause the smoke to come out of my exhaust at idle.
And if it is should i buy a turbocharger repair kit? <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
And if it is should i buy a turbocharger repair kit? <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
12-16-2002, 08:45 PM
#41
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Put the stock injecotrs back in it and tune it to them and see if it smokes. If not, it is the injector/ARC-2 combo, if it does, it is something else.
