WHHHY is my car soooo slow?!?

tomst9

Founding Member

Jun 17, 2002

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Bethlehem Pa

Jul 12, 2004

#1

• Jul 12, 2004

• #1

OK, my car does not even come close to the power that it should have. Basically it's slow and i can't figure out why. Timing is set at 16*. I recently changed the plugs that i was running from Autolite 3924's to NGK FR5's; i believe, to see if that was the problem. It didn't work. When i pulled the autolites out they were a little whitish, so i increased the fuel pressure a little to 45psi when i put the ngk's in. I ran it for a couple of days(its my daily driver) I pulled the ngk's and they were really white. Why did the car run even more lean when i increased the pressure? I used the same gap and everything. Now i increased the pressure to 48psi and still no power? I have the stock injectors with a bigger mass air meter and it is calibrated for 19lbs.ers.MY o2 sensors have maybe 3000miles on them. I ran a ecu test (koer) and it cam up with a 44 and 94 which is secondary air managment system failure and air managment system failure. I checked the MAF and its working. Could the cam be causeing that code to be set off? Some people have told me that with all the air and extra fuel you are putting in that you need a ignition system. What do you think? I have a stock ignition system. Or is my car that slow because of the automatic?

Sorry about the length. Any ideas will be greatly appreciated. My mods are in my sig.
thanks again
tom

 

ironmedic

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Mar 18, 2003

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Puyallup, WA

Jul 12, 2004

#2

• Jul 12, 2004

• #2

i hear mixed things about AOD's. if you are running all that stuff in your sig, u should upgrade the fuel system to 24lb injectors at least. also invest in the ignition system too.

 

SLiM JiM 156

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Mar 18, 2002

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36

Rohnert Park, CA

Jul 12, 2004

#3

• Jul 12, 2004

• #3

Put bigger injectors in there, I had H/C/I and all the boltons on my old 93 LX with stock injectors and I was only trapping at 100 running 13.8's. My bet would be injectors because you are running lean.

 

rsw007

New Member

Jul 7, 2004

469

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Lexington,SC

Jul 12, 2004

#4

• Jul 12, 2004

• #4

that much stuff you need to have it dyno tuned

 

A

AndFuelFor..All

New Member

Jul 12, 2004

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0

Jul 12, 2004

#5

• Jul 12, 2004

• #5

rsw007 said:

91 GT AOD, stock motor few bolt-ons 13.34@99.10mph with 1.75 60ft

Click to expand...

Wow, you peaked my interest!

What kind of few bolt-ons is that? Rockers? TB?

Thanks.

 

rsw007

New Member

Jul 7, 2004

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Lexington,SC

Jul 12, 2004

#6

• Jul 12, 2004

• #6

valve covers never been off and stock unported h/c/i

 

MustangMulch

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Mar 27, 2003

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Santa Clarita, CA

Jul 12, 2004

#7

• Jul 12, 2004

• #7

Two words:

Factory Freak.

 

tomst9

Founding Member

Jun 17, 2002

851

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Bethlehem Pa

Jul 12, 2004

#8

• Jul 12, 2004

• #8

is running lean the reason i have no power at all? What should i set my fp to for the time being?
thanks
tom

 

rsw007

New Member

Jul 7, 2004

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Lexington,SC

Jul 12, 2004

#9

• Jul 12, 2004

• #9

MustangMulch said:

Two words:

Factory Freak.

Click to expand...

hey that aint nice when in stock form it was high 15's fixing to be in 13.2's

sorry dont mean to highjack your forum

 

8

86/92stang

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Aug 18, 2002

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Charlotte

Jul 12, 2004

#10

• Jul 12, 2004

• #10

Maybe a dirty maf element?

 

tomst9

Founding Member

Jun 17, 2002

851

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Bethlehem Pa

Jul 12, 2004

#11

• Jul 12, 2004

• #11

how do i clean that, with a cotton swap and rubbing alcohol? Ooo that reminds me, where do you get the tool to take the screws out that hold the sensor down?
thanks
tom

 

3

347 Special

New Member

Nov 27, 2003

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las vegas

Jul 12, 2004

#12

• Jul 12, 2004

• #12

AndFuelFor..All said:

Wow, you peaked my interest!

What kind of few bolt-ons is that? Rockers? TB?

Thanks.

Click to expand...

NITROUS BOLTS ON !!!!!! lol

 

8

86/92stang

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Aug 18, 2002

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Charlotte

Jul 12, 2004

#13

• Jul 12, 2004

• #13

I just use a parts cleaner like brake clean and spray on there. Some get bad enough you can see the dirt collecting on the element. If you want to get fancy you can use electrical parts cleaner. I typically don not rub anything on the element they are pretty fragile and ive seen more than one break. If possible take the electronics out of the meter and clean.

 

3

347 Special

New Member

Nov 27, 2003

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las vegas

Jul 12, 2004

#14

• Jul 12, 2004

• #14

Use Brake clean to clean it. Spray it and let it dry. If you use a swab you might damage the sensor(it happens) I saw is your sig. Prothane engine mounts, I have the same.Did it raise your engine up 1/2 inch???????

 

8

86/92stang

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Aug 18, 2002

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Charlotte

Jul 12, 2004

#15

• Jul 12, 2004

• #15

the tool Im guessing its not a phillips screw (correct)? It should be a "tamper proof" T-20.

 

cab233

New Member

Jun 6, 2004

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New York

Jul 12, 2004

#16

• Jul 12, 2004

• #16

I would bring your timing back to 12 Degrees and put your fuel pressure with the vacuum line off at 48lbs. You need at least 24# injectors, 30# injectors will work. Better rich than lean. If the time you posted is your best with the mods you have there is something wrong. The biggest bang for your buck besides NOS for your car would be a new 3500 plus stall converter. Your trans will probably go next but you will have fun. I have a 91 lx 347ci, lentech strip terminator trans, 9.5 in. 4200 stall, edelbrock performer RPM 202 heads (unported), trick flow track heat intake, TF stage 2 cam, 4.10 gears, 30# inj. 1 3/4 full length headers, no a/c or smog, other than that it is loaded. Best ET 12.24 at 110mph 1.59 60' time. With 150 shot of NOS 11.18 at 120mph. with slicks of course.

 

rsw007

New Member

Jul 7, 2004

469

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Lexington,SC

Jul 12, 2004

#17

• Jul 12, 2004

• #17

347 Special said:

NITROUS BOLTS ON !!!!!! lol

Click to expand...

not yet, maybe next year im almost out of tricks i was hoping to get an aod in the 12's on just a bolt-on motor but its not going to happen.

becareful cleaning maf "GENTLE"

 

3

347 Special

New Member

Nov 27, 2003

78

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las vegas

Jul 12, 2004

#18

• Jul 12, 2004

• #18

rsw007 said:

not yet, maybe next year im almost out of tricks i was hoping to get an aod in the 12's on just a bolt-on motor but its not going to happen.

becareful cleaning maf "GENTLE"

Click to expand...

What ever you "bolted on" Great times, props. too ya. Im figuring you un-bolted lots more to lose some wieght. And have good susp.

 

rsw007

New Member

Jul 7, 2004

469

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Lexington,SC

Jul 12, 2004

#19

• Jul 12, 2004

• #19

347 Special said:

What ever you "bolted on" Great times, props. too ya. Im figuring you un-bolted lots more to lose some wieght. And have good susp.

Click to expand...

thanks man it weighs 3050 with my 200 = 3250 and yes suspention worked and plotted

 

tomst9

Founding Member

Jun 17, 2002

851

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Bethlehem Pa

Jul 12, 2004

#20

• Jul 12, 2004

• #20

The times in my sig were before i did anything to the car. I would be really pissed i ran that with what i have now. Yes the motor mounts raised the motor 1/2 or more. Created quite a few clearance problem, but the are definitely stiff mounts. Would carb cleaner work? I have a bottle of that laying around already. Do you guys think thats what causeing the problem? Isn't 12* timing really low for aluminum heads? I'll try it, i'm desperate.
thanks for the replies
tom