Issues after Turbo Install - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 32 Old 05-27-2011, 07:35 PM Thread Starter
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Issues after Turbo Install

I got my on3 kit installed on my 94 cobra. It runs but will not idle. It will start after I hold the throttle down to turn off the injectors. Then it idles for a little bit then dies. It also has a lack of power completely, won't even go up the hill on my driveway without dying....

I do not have a tune yet it is running on the stock computer. Is it just getting completely flooded out from the 60# injectors?

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post #2 of 32 Old 05-27-2011, 08:22 PM
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Lol, yes. the same pulse with the injectors 3 times as large as stock is going to flood that poor thing.

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post #3 of 32 Old 05-27-2011, 08:33 PM Thread Starter
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Originally Posted by 10secgoal View Post
Lol, yes. the same pulse with the injectors 3 times as large as stock is going to flood that poor thing.
I was always under the impression that using the maf calibrated for the injectors helps. In no way do I expect it to run without a tune, I just cannot even get the timing set or anything...
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post #4 of 32 Old 05-27-2011, 10:47 PM
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If you just want to run it to set the timing and check things out, then stick the stock injectors in it untill you get ready to do the tuning. Of course dont go WOT though.
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post #5 of 32 Old 05-27-2011, 11:19 PM
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What air meter are you using?
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post #6 of 32 Old 05-27-2011, 11:23 PM
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you need a meter calibrated for your injectors and a adjustable regulator...
post #7 of 32 Old 05-27-2011, 11:58 PM Thread Starter
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Originally Posted by jaidedeye View Post
you need a meter calibrated for your injectors and a adjustable regulator...
Yes I know. I have a PMAS calibrated fpr 60# and areomotive afpr set at 40psi with vacuum off.
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post #8 of 32 Old 05-28-2011, 12:05 AM
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Originally Posted by paxton50mustang View Post
I was always under the impression that using the maf calibrated for the injectors helps. In no way do I expect it to run without a tune
What meter are u running? My car has a pro-m 3" blowthru cal'd for 42's and it works great.
No tune ever, no adjustable fpr and no factory O2 sensors. It starts,idled and cruises like a stock car.

88' Coupe
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post #9 of 32 Old 05-28-2011, 12:08 AM
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Quote:
Originally Posted by paxton50mustang View Post
Yes I know. I have a PMAS calibrated fpr 60# and areomotive afpr set at 40psi with vacuum off.
What is your base timing set at?

88' Coupe
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post #10 of 32 Old 05-28-2011, 08:52 AM Thread Starter
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Originally Posted by rdub79 View Post
What meter are u running? My car has a pro-m 3" blowthru cal'd for 42's and it works great.
No tune ever, no adjustable fpr and no factory O2 sensors. It starts,idled and cruises like a stock car.
Like I said above I am running a PMAS and I cannot even get the base timing set because it won't idle... Fuel pressure is at 40. I am kinda leaning toward it is flooding out since I have to floor it to shut off the injectors most of the time to start. But just want to make sure it isn't anything else.

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post #11 of 32 Old 05-28-2011, 12:38 PM
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sounds like a timing issue then.
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post #12 of 32 Old 05-28-2011, 12:50 PM Thread Starter
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Originally Posted by Tachophobic View Post
sounds like a timing issue then.
I know the timing is pretty close but not at 10 because I cannot check it... I tried bumping it a bit each way and still no change. I think it is getting flooded out but want to make sure this is normal with 60# without the tune...
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post #13 of 32 Old 05-28-2011, 01:26 PM
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This is not too normal. I have 50# injectors and PMAS and it started cold all the time and ran good but after the car got to about 190 degrees it wouldn't start again until it cooled. Sometimes I had to hold the pedal to the floor to restart and it was a crap shoot on if it would start. I had a draw onn the battery or electrical system somewheres and I changed the TFI module and added some grounds from the block to the frame and that fixed my hot start issues along with the battery draw.

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post #14 of 32 Old 05-28-2011, 02:07 PM
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sn95 computer is a little diff then our fox computers guys.
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post #15 of 32 Old 05-28-2011, 02:53 PM
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60s are way too big to fix with a calibrated maf. You'll even have issues with 42s, the car goes back to the base tune occasionally and will dump fuel. Try turning your idle up to around 1100 or so, may let you sample from the maf rather than the base tune, maybe you could get it going enough to limp it around.

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post #16 of 32 Old 05-28-2011, 04:06 PM Thread Starter
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Originally Posted by MJs89GT View Post
60s are way too big to fix with a calibrated maf. You'll even have issues with 42s, the car goes back to the base tune occasionally and will dump fuel. Try turning your idle up to around 1100 or so, may let you sample from the maf rather than the base tune, maybe you could get it going enough to limp it around.
Tried that, it still won't idle.... As long as I know it is the injectors and not something else. I probably won't try running it anymore until I get the tune, I do not need to wash down my cylinders.
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post #17 of 32 Old 05-29-2011, 12:59 PM Thread Starter
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Well I threw my cousins PMS on (DONMEGA). Got it to idle perfect and got the timing set, still will not rev up good but at least this is telling me that it is in fact tuning. I will have to talk with my tuner on Tuesday to find out for sure, otherwise dyno next Saturday
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post #18 of 32 Old 05-30-2011, 02:43 PM
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Maybe your Dizzy is out 180? & it's just washing the cylinders out with fuel
Also lock out your Dizzy @ 18 once it idles & go from there!

Late 30's not so fat anymore white guy drivin a Turbo 5.0.....15 years TOO late
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post #19 of 32 Old 05-30-2011, 09:33 PM Thread Starter
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Maybe your Dizzy is out 180? & it's just washing the cylinders out with fuel
Also lock out your Dizzy @ 18 once it idles & go from there!
Nope, it is set. If it was 180 it would be backfire like a MOFO.

Why should I lock my dizzy at 18? Do you mean for without a tune?

I have the base timing set at 10*, that is what my tuner Mike Post told me to do. It is getting tuned next week.
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post #20 of 32 Old 05-31-2011, 04:54 PM
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This may sound stupid....but if you have the PMAS calibrated MAF for 60lb injectors and you had to clip off the 4 wire plug and hook up the pigtail for the PMAS MAF sensor maybe you wired the Send wire and return wire backwards in the pigtail.
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post #21 of 32 Old 05-31-2011, 08:30 PM Thread Starter
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This may sound stupid....but if you have the PMAS calibrated MAF for 60lb injectors and you had to clip off the 4 wire plug and hook up the pigtail for the PMAS MAF sensor maybe you wired the Send wire and return wire backwards in the pigtail.
I just spent the extra money and bought the PRO-M plug to go from the 6 prong connector to 4. Makes life easy.
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post #22 of 32 Old 05-31-2011, 08:47 PM
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sell it and buy a chevy, maby you will have more luck!!!!LOL

Sold my car for a boat!!!!
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post #23 of 32 Old 06-01-2011, 01:21 PM Thread Starter
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sell it and buy a chevy, maby you will have more luck!!!!LOL
Can practically buy a rebuild kit at wal-mart lol
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post #24 of 32 Old 06-02-2011, 03:13 PM
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A friend just had the same issue!
Check to see if it is getting 12 V?
His for some reason was only getting 6 switched wires & works perfectly

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post #25 of 32 Old 06-02-2011, 07:22 PM Thread Starter
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A friend just had the same issue!
Check to see if it is getting 12 V?
His for some reason was only getting 6 switched wires & works perfectly
Just double checked, 12v....
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post #26 of 32 Old 06-02-2011, 08:23 PM
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does it hold fuel psi after you turn key on/off? maybe an injector is stuck open

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post #27 of 32 Old 06-02-2011, 08:33 PM Thread Starter
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does it hold fuel psi after you turn key on/off? maybe an injector is stuck open
Yes it does, I have the gauge right on the rail. It holds at least 20# for over an hour.
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post #28 of 32 Old 06-02-2011, 10:44 PM
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I basically have the same setup as you (1995 gt)with 60lb injectors...Mine wouldnt start without having a base tune chip installed. They change cranking pulse width scalers and other things to cut fuel on cranking so it will start with 60lbers. Mine starts right up with the touch of the key when cold...but when up to operating temp I have to crack the throttle slightly. Im still working on my tune. Tuning it myself now with moates quarterhorse and binary editor.....I love it.
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post #29 of 32 Old 06-02-2011, 10:50 PM Thread Starter
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Mike post is tuning my sct chip sat morning. I have pro racer software but no burner... How does the quarterhorse compare to sct?
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post #30 of 32 Old 06-03-2011, 02:09 PM
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this thing works awesome at getting modded stangs to idle smooth
you can get directly from ford for like 20 bucks

IAC adjustable idle spacer kit Ford Mustang 5.0 EFI 4.6 | eBay

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post #31 of 32 Old 06-03-2011, 10:33 PM Thread Starter
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this thing works awesome at getting modded stangs to idle smooth
you can get directly from ford for like 20 bucks

IAC adjustable idle spacer kit Ford Mustang 5.0 EFI 4.6 | eBay
It isn't an air issue, it is running pig rich.

Is that for when you don't have a tune?
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post #32 of 32 Old 06-04-2011, 10:53 AM
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Im not sure the pros and cons of both, but I know everyone pretty much has the moates quarter horse. Also you can data log with it. I like it very much you can also make changes on while the car is running (real time emulation)...Im still learning but now I have something that I can tune the car with myself.
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