[cadillacmob]

On my mustang after i did the 1993 cobra intake at first it felt real quick, but the second day i drove it it felt like a different car. its really weird but it feels dogged down. The only thing i touched b4 the second time i drove it was the pcv was not hooked up. so b4 i drove it the next day i ran a new line. thats it. disgusted i put in motor craft platinum plugs ford racing wires and msd cap and rotor, and still feels doged down.

I had 3:55 gears put in and they feel good, but still not like my cars was b4 the intake swap.


some things i noticed while drivin it now is when im about half way on the gas it really feels good then once i put my foot down to the floor it feels dogged. It seriouselt faster b4 i swapped the intake.


Any ideas?

[89coupe]

Pull the codes first

DIY KOEO/KOER/Cylinder Balance Self-Test Procedure

[cadillacmob]

Originally Posted by 89coupe

Pull the codes first

DIY KOEO/KOER/Cylinder Balance Self-Test Procedure

my check engine light didnt go on, should i do the test anyway?

[89coupe]

Yep, most OBD-1 codes wont show a CEL.

[cadillacmob]

wow i didnt know that, ill do it tomorrow morning, and report back. Also u think fuel filter?

[ar0wan]

.. .. .. .. .. ..

[ar0wan]

Sounds like you're running rich if anything
but wat do I know
AF ratio is off

[cadillacmob]

i did the test , i had a 22, or 11. i couldn tell. but im pretty sure it was a 22


11 - System Pass (O,M,R)
22 - Manifold Absolute Pressure/Barometric Pressure Sensor Out Of Self Test Range (O,M,R)

[89coupe]

Need to make sure of the Codes. An 11 should be by itself, unless there are memory codes.

[cadillacmob]

ya it was eleven i had a friend check it. this car is really makin me mad

[svnt442]

I'd check for a vacuum leak. Spray some carb cleaner all around the intake by the upper/lower, tb, egr and all the hose connections.

[cadillacmob]

Originally Posted by svnt442

I'd check for a vacuum leak. Spray some carb cleaner all around the intake by the upper/lower, tb, egr and all the hose connections.

what would that do?

[samotrx7]

If you have a vacuum leak and you happen to spray where it's leaking the idle should rise up temporarily. Does the car backfire or anything? When you downshift and let it slow down is it popping excessively? What other possible symptoms is it showing?

[Bullitt95]

Originally Posted by samotrx7

If you have a vacuum leak and you happen to spray where it's leaking the idle should rise up temporarily.

It's the reverse. A vacuum leak will cause a high idle so if you spray liquid where it's leaking, it'll temporarily seal and the idle speed will drop.
Sounds to me like the engine might be running lean now that it has the extra airflow of the new intake.

[85saleenclone]

try not to over think it, I do that with my car all the time, first things first, vaccum leaks, then play with the timming, could be as simple as that......