What would cause this.

WhiteDevil

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Feb 4, 2003

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Mar 21, 2004

#1

• Mar 21, 2004

• #1

So i installed my new AFM N/A Power pipe and Pro-M 80mm MAF on my GT last week. and i drove it a few times. It idles fine and runs great, and it pulls really hard to 5,200 then it like pings/breaks up right past 5,200. Sometimes worse than other times. It didnt do it however the first few times that i drove the car. But it just randomly started. Sorry to be so broad, any ideas.

 

95snoozer

Active Member

Dec 14, 2002

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RCR

Mar 21, 2004

#2

• Mar 21, 2004

• #2

if it was programmed for 24s it might do that ... just a though

how hot is your car?

or bad tank of gas... stay off it till you get some premium form a different place

 

WhiteDevil

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Mar 21, 2004

#3

• Mar 21, 2004

• #3

95snoozer said:

if it was programmed for 24s it might do that ... just a though

how hot is your car?

or bad tank of gas... stay off it till you get some premium form a different place

Click to expand...

The calibration card with it says #19 so im ruling that out for now. The car runs nice and cool its got a 180 stat and Fluidyne. I was thinkin it could be the gas too, ill probably try some new gas from a different place.

 

GTJake

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Oct 28, 2002

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Mar 22, 2004

#4

• Mar 22, 2004

• #4

Are you running 91 or 93? I would say it's bad gas also if it started doing it recently and not right when the meter went on. Also, the power pipe probably flows better than that MAC unit you had, so that may cause a lean condition in the upper RPMs. Maybe try bumping up the FP a little bit.

Jake

 

9

94whitesnake

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Mar 20, 2002

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Allentown, PA

Mar 22, 2004

#5

• Mar 22, 2004

• #5

i'm no pro, but it sounds indicitive of the MAF actually maxing out way before it should? Doesnt make sense with the mods he has, but I'm just throwing it out there. It would suck if that's the case.

 

WhiteDevil

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Mar 22, 2004

#6

• Mar 22, 2004

• #6

Well i use 91 octane. The gas in the tank is about a 3 weeks old because i havent been driving the stang that often. Im not sure how much that could effect the quality of the gas? When i put the new CAI and MAF on it ran good and pretty strong. Then i didnt drive it for a week or so and then i came back and it was doing this. Well here are the steps im gonna take and the order.
1st Fill the tank with new premium Gas
2nd Tune up Plugs, wires, fuel filter
3rd play with fuel pressure
4th play with timing

How does that sound anything else i should do?

 

95snoozer

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Dec 14, 2002

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Mar 22, 2004

#7

• Mar 22, 2004

• #7

i had a brain fart

THE MAF IS NOT READ AT WOT



play with FP timing and gasoline and keep that radio off to listen to Detonation

 

9

94whitesnake

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Mar 22, 2004

#8

• Mar 22, 2004

• #8

95snoozer said:

i had a brain fart

THE MAF IS NOT READ AT WOT



play with FP timing and gasoline and keep that radio off to listen to Detonation

Click to expand...

Thanks, I did not know that. I guess that's why it's called "closed loop". Sorry everybody.

 

95snoozer

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Dec 14, 2002

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Mar 22, 2004

#9

• Mar 22, 2004

• #9

i myself forgot until It clicked in my mind

 

WhiteDevil

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Mar 22, 2004

#10

• Mar 22, 2004

• #10

Really? The Maf isnt read at WOT??

 

B

baglock1

The Bartender

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Aug 25, 2001

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Mar 22, 2004

#11

• Mar 22, 2004

• #11

WhiteDevil said:

Really? The Maf isnt read at WOT??

Click to expand...

At WOT the EEC goes into closed-loop mode. Basically, it disregards any readings from most of the sensors. The MAF, O2's, etc. It sees the WOT and just starts dumping as much fuel as possible into the engine to prevent any lean condition and to piss off the EPA.

 

swingline

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Sep 18, 2003

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TCB - Taking Care of Business

Mar 22, 2004

#12

• Mar 22, 2004

• #12

to piss off the EPA

Click to expand...

My O/R H-pipe's goal in life.