Boost Sputter with MAF-T and SAFC

[supraguy31]

Well as the title States and Im sure that someone has run into this Before. Boosting up to 19 PSI with no Problems, All of a Sudden, I get out on the road, Start to boost and when it Hits 14PSI, I start to get a bad sputter as though Im running out of fuel. FPR is set at 45psi and the MAFT setting for fuel cut is Disabled or set to (C)

What do you all think?

Robert

 

[dbsupra90]

where is the maf sensor mounted? if its blow thru you may have a boost leak causing it to run rich and stumble. anything to monitor a/f?

 

[robbo185]

any other fuel upgrades?
what are your other maft/safc settings

 

[supraguy31]

The MAF-T is setup inside of the Intake track and not on the Accordian Pipe. Other Upgrades are 550s, MKIV Fuel Pump, Megan FPR, on a 57 Trim ct26, Wideband 02 Sensor to Monitor

I have the Maft settings setup for the 550s, and The switch set to (c) to disable fuel cut. Im using the SAFC to turn my A/F so the Idle, Mid and WOT are set to 0 on the MAF-T

Robert

 

[robbo185]

what are the wideband readings when that happens?

 

[supraguy31]

Wideband Readings are fine. Under Boost, It will drop between 11.2 to 12.0

Im thinking I might have a Bad FPR. When I go to Adjust it, The Idle doesnt increase or decrease. Going to check it.

Robert

 

[robbo185]

if your a/f is fine then it may be the start of a boost leak

 

[supraguy31]

Just wondering where to look, I have noticed that then it does it, My boost gauge starts to Bounce around pretty good. If I set it to 18psi, As soon as I hit 14PSI it starts to sputter a little but it will reach 18psi with the Sputtering also.

Robert

 

[robbo185]

check your clamps, hoses, everything.....if nothing is obviously noticeable. Make a boost leak tester....you can use the search feature above to find the thread

 

[supraguy31]

I will check that tomorrow. Hopefully I will find something.

Robert

 

[oldschool85]

check your clamps around the maft area and also check your couplers for cracks. Robert, my coupler used to blow off the maft until i changed the cheapo universal clamp to a t-bolt

charlie

 

[supraguy31]

Hey Charlie, Nice of you to chime in. I checked everything today, I had 2 Clamps that for some reason were loose. Probably lookse enough to leak. Stange thing is that these are the T-Bolt Clamps. I will set you know tomorrow if that solves the Problem.

Thank you everyone for your Imput.

Robert