Running Rich, turn down the FPR?

[kleiner]

Just put in a AEM wideband. Look to be running about 14.7 idling and at wot it shoots down to 10 (lowest it shows). My fuel pressure at idle (1000 rpm) is 35psi (or 40) can't remember at the moment.
Was going to turn down the FPR a little to see what happens
Good Idea?
Bad Idea?
Thanks

[GLHNSLHT2]

how about smaller injectors? 35 is geting pretty low.

[turbovanman²]

What cal, injectors?

You can try another 5 psi but don't go below 25.

[kleiner]

don't know what cal or injectors, bought it the way it is.
now that I think about it. I believe there was a receipt that mentioned injectors (car came with a bunch of receipts)
Will try it tomorrow, see what happens.

[turbovanman²]

The injectors have number at the top side, read it and compare the numbers in the KC.

[kleiner]

Thanks, ok Stamp # 4532586
+40's ?

[BadAssPerformance]

should be. what cal? what year car? 2.2L or 2.5L?

[kleiner]

Nocked the fuel pressure down to 27psi was still running rich at wot (10.0 on the wideband). At idle still about 14.7

Ok, I'm still trying to figure things out I appologize for dum questions
So the Cal is Calibration and this means the computer that is running the Air fuel ratio?
I think I have a super 60 computer, is there any way to find out?
Will take a look at it right now.

[kleiner]

Sorry the engine is a 2.2 out of a 89 csx

[BadAssPerformance]

yes cal = calibration... the computer should have a part number on it, list in the KC (Knowledge Center)

Since it idles ok and it is rich at WOT you could add a little boost to bring it up to 11:1 :thumb:

but before that, list everything

cal?
boost?
spark plugs? gap?
ignition timing set at?
cam? timing?
etc?

[BadAssPerformance]

Sorry the engine is a 2.2 out of a 89 csx

Is it still a T-IV or a T-II? what year car is it in? what year electronics?

[kleiner]

Ok this is what I know so far the rest I gonna have to figure out.
-T-II engine
-Computer is hard to read the Part # looks like P4?mabye3 2417
-Boost is at 18psi
-Spark Plugs NGK (Will look up the part number)
-gap ?
-Ignition Timing ???
-Cam ??? is there a part number on them some where?

[kleiner]

Holy crap Just read the Knowledge center on tunning a cal. This aint gonna be easy.

[kleiner]

Ok I think i found my computer
it is for the origional car
86 Shelby TII
P4532417

These are the Inkjectors that should go with the computer P5249670
MP 86/87 Shelby GLHS Stage II old=P5249054 #OC=P4532417

So I guess the guy before me put in a T3/T4 turbo and +40's injectors but did not change the computer?

So what should I do?
Cheers

[BadAssPerformance]

So what should I do?

That depends on your goals, what do you want to do with it or get out of it?

10:1 a/f is safe at WOT and it seems to idle ok at 14.7. Are you looking for fuel economy? power? what do you use the car for?

[GLHNSLHT2]

10:1 is where his a/f gauge stops. Could be running way richer than that. I'd get smaller injectors.

[chilort]

Is your car an '86?

I'm running 804s with a Stage III cal from Cindy and I had to turn the fuel pressure down because it was very rich as well. 804s are only slightly more than '89 TI injectors. Of course, I'm still running a log intake..... but +40s would be huge. Maybe too over sized to be able to drop the fuel pressure enough to make it work.

[kleiner]

It could be more than 10
I want to run less fuel. At the moment it is burning a little blue.
I have gone through everything.
I am hopping that some how it is running so rich that it is washing the walls, thining the oil causen me to run blue.

My goal is to have a smooth daily driver that is fun.
It has enough power for me
Again it does heisitat when I open it up, for a few seconds, then takes off.
I just changed the oil, going to try to drive around easy for a week, not running super rich and see if it still burns oil.
Cheers
for all the input.
After this I think maybe smaller injectors or try to do some cal stuff?

[kleiner]

Just curious, the car seems to be running ok, no blue. It is rich though.
Should I get different injectors? +20's will this work? is it possible to tell before I buy them?
or should I set up a cal?
Thanks

[GLHNSLHT2]

how stock is the engine and exhaust setup? If it's bone stock I'd go back to full stock injectors. That's what the MP puter is made for. If the exhaust is modded pretty good I'd go +20's and maybe tune some fuel out with the Adjustable reg.

[kleiner]

Turbo II
Forged JE's
T3/T4 Turbo 18psi
Accufab FPR
+40's injectors
I think I have a 2 1/2 inch stainless steel exhaust
I don't think anything is ported
Stock Shelby ECU
Not sure about the cam
Stock top end.
Running about 14.7 air/fuel taking it easy, and lower then 10 wot
I'm thinkin +20's
it is possible to figure it out, or is it plug and play.
Cheers

[trbowgn]

Again it does heisitat when I open it up, for a few seconds, then takes off.


That sounds like the cam timeing could be advanced a tooth. No low end and then opens up. I think this could also cause your mixture to be a little screwy. Check the KC on how to verify cam timeing.

If you have +40's and a stock cal you are going to run very rich. Try and find a stock set of T2 injectors and see what that does.

[turbovanman²]

You won't have a stock cal as if you did, you couldn't run 18 psi, unless your running some sort of Map cutout. Do you have a 3 bar map??

[t3rse]

10:1 is NOT safe at WOT...common people...you will wash down the walls and end up with gas in your oil which will lead to toasted bearings

and...turning up the boost will not lean it any if the computer is set up for a 3 bar and you go past 14.7#

hesitation on throttle opening is likely from being too rich as well

[kleiner]

Ok, so how do I check if I have a 3 bar map sensor?
Thanks Again for all the input
I do have stock injectors, but I thought with the boost being so High, they will not work.

[turbovanman²]

A stock MAP is round, A 3 bar is square shaped, GM style. Look on TU or FWD's website and compare shapes.

Yep, with stockers, you can't run 18 psi.

[kleiner]

Ok Yes I have a 3 bar map sensor thanks Turbovanman.
So what next. Should I buy the +20's?
or should this set-up (+40's )be workable with what I have?
I tired turning down the fuel pressure but still ran super rich.

[turbovanman²]

Ok Yes I have a 3 bar map sensor thanks Turbovanman.
So what next. Should I buy the +20's?
or should this set-up (+40's )be workable with what I have?
I tired turning down the fuel pressure but still ran super rich.

I would get a cal made for your setup and leave the +40's in there.

Contact "shelgame" or FWD performance.

[GLHNSLHT2]

whole setup sounds f'd up. You have a 3 bar map on a 2 bar MP computer and +40's. With your engine setup I'd keep the computer, find a stock turbo map and go back to stock injectors. Gonna be cheaper that way and make the same power at lower boost with the Stage 2 GLHS puter.

[GLHNSLHT2]

with stockers, you can't run 18 psi.

Sure you can. I did on my old 2.2 T2 setup.

[turbovanman²]

Sure you can. I did on my old 2.2 T2 setup.

Ok, so your the exception, generally, you can't run 18 psi on stock injectors, UNLESS your running additional injectors, IE cold starts. ;)

[turbovanman²]

whole setup sounds f'd up. You have a 3 bar map on a 2 bar MP computer and +40's. With your engine setup I'd keep the computer, find a stock turbo map and go back to stock injectors. Gonna be cheaper that way and make the same power at lower boost with the Stage 2 GLHS puter.

Running a 3 bar map on a 2 bar cal with +40's will run mega lean, not good at idle and pig rich on top.

[kleiner]

Ok, Thanks.
So my problem is the 3 bar map on my stock computer.

I have two options, gonna research them both.
1. New Cal (GLHNSLHT2 this is going to be expensive,as in I will have to set everything else up to this?) How much would this cost? any ideas. I will contact "shelgame" "aries-turbo" or FWD performance.
2. Find a stock map and put my other injectors in (good option for now)

Thanks everybody

[turbovanman²]

Ok, Thanks.
So my problem is the 3 bar map on my stock computer.

I have two options, gonna research them both.
1. New Cal (GLHNSLHT2 this is going to be expensive,as in I will have to set everything else up to this?) How much would this cost? any ideas. I will contact "shelgame" "aries-turbo" or FWD performance.
2. Find a stock map and put my other injectors in (good option for now)

Thanks everybody

NO, that is not your problem, a 3bar map on a 2bar set up is lean. You have a mismatched combo. Either put it back to stock or get a proper cal.

A cal is your best option, it might be more right now, unless your computer is socketed but in the long run, the BEST option.

[kleiner]

Ok I get it now a MP computer that is supposed to be used with a 2 bar map, but mine has a 3 bar in it.

Just to make things more confusing for me I rifled through the box of parts that came with the car. I found 2 square map sensors (both red lettering, with these numbers 5227324, 34616, and one with 8626AA and the other with 8625AA) The one I have in the car is the same except the last number again it has 8623AA
Anyway I can find out what these numbers mean? is there anydifference in them?
Are they all a 3 bar map sensors?
I also found a GM one and 3 stock round ones.

I just e-mailed the guy I bought it off of, asking about the computer. Will let you know.

[kleiner]

or is the MP computer already a 2 bar map?

I just found anouther computer Part # 522737533 supplier 7902
the date on it is 07/08/86 so I am assuming that this is the origional one for a GLHS?
anyway to tell if a computer has been calibrated or not?
thanks

[kleiner]

Turbovanman what do you mean by a computer that is socketed?

[kleiner]

I figured out what socketed is, so you can put different chips into the computer easy. I think

[turbovanman²]

Based on what you posted up, I'd say you have a 2 bar MAP. Check you take pics of it and the socket area.