Low boost on 03 cobra HELP!?

03KingSVT · 02-09-2009

Low boost on 03 cobra HELP!?

Just bought the car last month 1st gear floored gets up to about 7 lbs and then when it reaches about 3500rpm the the boosts dies and drops to about 3-4 psi mods on the car are an autologic chip magnaflow exaust and a bbk cold air intake (fenderwell) the car also looks to have an aftermarket supercharger pully looks to be in the 3inch range def not a 2.8.. really need sum advice took it to the ford delearship and they told me to get it retunned they said it was running to lean???? talked to a shop thats going to charge me 800 for a 2.8, supercharger tensioner, diablo chip and tune with a new belt.. dont no if i should spend the money need advice on what the problem is...

Thanks, mike : )

daboyho50 · 02-09-2009

Take it to a speed shop and have it re-flashed. That's my best guess. Forget the diablo tune (not sure why you'd do a diablo and a tune. Just a reflash should have you set straight). Just don't drive that thing anymore till you get it tuned. . . Lean termi's are a ticking time bomb.

**stlwagon** · 02-09-2009

Get it tuned on a dyno. Forget the pulley swap for now.

03KingSVT · 02-09-2009

why not the pulley swap?.. and will the dyno tune help it u think?

**stlwagon** · 02-09-2009

Quote:

Originally Posted by 03KingSVT

why not the pulley swap?.. and will the dyno tune help it u think?

I'd worry about getting it dialed in as-is for now and do the pulley swap later. A dyno tune on a forced induction car is always a good idea.

ITLRUN · 02-09-2009

Why would you want, to use a chip in an 03 Terminator to begin with? You could, have a bad gauge, or check the vaccuum line going to the gauge. But definetly get it tuned, and straighten out that problem with your boost dropping off. As far as a tuner, I would go with an X Cal-2 or 3 you don't want to use a chip. Especially at inspection time, you have to remove the chip because it will send back a different processor code. At least, with a hand held tuner you can keep your tune in the car, and not worry about it, Mike. SCT Tuner.

younggun04 · 02-09-2009

Quote:

Originally Posted by stlwagon

I'd worry about getting it dialed in as-is for now and do the pulley swap later. A dyno tune on a forced induction car is always a good idea.

If he is going to get the car tuned why not do the pulley too?

I would not trust a canned tune and would get a custom tune. while your at it do a 2.76 pulley. don't get a chip get a hand held tuner and there is no need for a new tensioner you can just notch the stocker. I would do some research on a the tuner you are going to use. That is the most important part of upgrading these cars. That price is not bad for what they are doing just make sure the tuner is reputable. Also your boost loss could be many things besides the tune but I would start there since you need one anyway.

daboyho50 · 02-10-2009

I don't trust the diablo tuners, or any other one for that matter. Have it re-flashed or do a dyno tune (in my opinion). . . After your pulley swap, I'd advise another tune also. As younggun said, your boost loss could be a number of things. However, you need to get it tuned right also.

I had a diablo tune on my 03, had it reflashed a few weeks ago. . . It's not running rich anymore, and it's got gobs more power. (I failed emissions running a 3.2 on one of the tests, after the reflash I ran a .072 with the max being 1.5)

Brutal Metal · 02-10-2009

GEEZ More dogging of the Predator? Once again it's the guy doing the tune that is most important. It's not the Diablo that made your car run rich it was the guy that set the parameters in the first place!!
I agree the canned tune loaded on it isn't gonna work for everyone BUT a reputable CMR dealer can do a custom dyno tune and transfer it to your device. What's not to trust about that method?

03KingSVT · 02-10-2009

took it to a performance shop to get all the mods i was telling you about and they called me back with sum bad news.. they told me that whoever owned the car last installed the aftermarket pully that was on the supercharger wrong and it messed up the gears inside the supercharger.. they said i could rebuild it for 400.. then they called me back and said they found a used eaton that was takin off a 03 for a whipple swap they are sellin it for 325 not shipped shipping will cost like 20.. dont no if i should buy it tho.. they dont no how many miles are on the used eaton but they said it ran like new when they took it off.. need advice please help

Thanks, mike

Brutal Metal · 02-10-2009

Mike Definitely check Ebay for a low miles Stock Eaton, there's gonna be quite a few, lot's of guys upgrade and sell the Eaton for cheap! Here's a couple links...

http://cgi.ebay.com/ebaymotors/2003-...spagenameZWDVW

http://cgi.ebay.com/ebaymotors/03-Co...spagenameZWDVW

http://cgi.ebay.com/ebaymotors/03-04...spagenameZWDVW

lightning98 · 02-10-2009

I would give stiegemeier a call and see how much they would charge to rebuild it for you. buying another used one may not be a good idea you could be in the same boat 10,000 miles later. atleast if you get it rebuilt you know its good. Stiegemeier Supercharger Porting, Rebuild, and Repair

younggun04 · 02-14-2009

If the stock blower is damaged take it off and send it to get rebuilt and ported. 400 bucks for a new stock is stupid when you can get a ported eaton and a front drive rebuild for 4-500 bucks.

daboyho50 · 02-14-2009

Stage V Steigmeier port w/ MAF and Throttle body = money shot

hotcobra03 · 02-26-2009

i have the same problem..mine went from 10 to about 7..at least thats what the gauge sayes..i have alot of miles on it and did disassemble the complete blower to find the coating on the rotors has cooked and i took it off..im not so sure about it being worn out..i had the drivers head blow a valve which put alot of oil into the intercooler ,,i did clean what i could but i feel its still not clear enough to allow air to pass thru and my boost is going backwards,,,only thing that might be different is when heads were off i had the valve cut to a 3 angle..i have read that headers lower boost1-2lbs..i do have bbk l/ts,..things i did replace vacuum harness is new and supercharger solenoid,,,i might try the acuator next but my boost dosent drop it only goes to the t in boost,,if i pump throttle it might go up 1lb with lower vacuum...your cai is most likely your lean problem..i heard they bite,i stayed with stock box with kn filter...