hitting fuel cut....

[boostinprine]

My car is hitting fuel cut in 3rd, 4th and 5th. I have 3"DP, air/water intercooler, no 3000 pipe, je pistons around 9:1 compression. everything else is stock. I have my boost controler at 10psi. however boost creeps up to 11 and i hit fuel cut. Im curious as of why boost is creeping up on me. I am going to put a wideband on it this weekend and adjust the screw on the bottom of the mass airflow sensor to try to get around fuel cut. anyone have similar problems? Im sure im missing something here.

 

[grimreaper]

boost creep = wastegate to small/not operating correctly or craptastical BC
what turbo?

where the hell did you get an air to water intercooler and can you get some picks of it?

 

[GC89]

where the hell did you get an air to water intercooler and can you get some picks of it?

I was going to ask the same thing

 

[Poodles]

What kind of boost controller?

High gears raise the load on the engine causing more boost. Need to know ALL your mods to figure this out...

 

[boostinprine]

the air to water is a cheap xs power unit from ebay. the engine is in a mustang. It has stock ct26. and 3.73 in rear end. boost controler is a Blitz SBC-ID.

that is the intercooler...

[/IMG]

 

[boostinprine]

also used a LM1 and AFR was in the 9s. backed screw on bottom of airflow meter all the way out and AFRs are around 11. stoped fuel cut allot but everyonce and a while it will stll hit...

 

[figgie]

fuel cut is dependant on numerous things. One happens to be the AFM frequency but the HAC's output also will vary the FC.

Now with that said. It is more than likely a Boost controller issue as I never had creep with an HKS EVC IV.

The Blitz SBC-ID. What is your gain setting at?

 

[boostinprine]

gain is at 15. im gonna try to lower it to 10 and try that. HAC?

 

[figgie]

gain is at 15. im gonna try to lower it to 10 and try that. HAC?

HAC = High altitude compensation sensor. On 87-88 is located right underneath the glove box. On the 89-92 it is internal to ECU.

 

[rumptis]

Have fuel cut at 11 PSI is normal.

That is where I hit FC as well with basically the same things you have.

I don't see anything wrong here.

 

[suprafanatic]

omg your from IL!!! lol i lived in Mattoon IL then moved to indiana last month for college. I'v never liked mustangs, but at least you have a great motor in it

 

[boostinprine]

whats wrong is i have boost controler set at 10psi and it is creeping up on me. it rarely stays at 10.

 

[tbcmorris]

whats wrong is i have boost controler set at 10psi and it is creeping up on me. it rarely stays at 10.

That sounds like either a boost controller fault,or an incorrect gain setting

 

[boostinprine]

lowered gain to 10 gonna see what happens

 

[lepad_ae86]

What boost controller??

 

[92TealSupra]

Your fuel cut issues may be able to be solved by lowering your setting of course, but a Lexus AFM may work well for you, and is known to be very effective, saw one on Ebay today 75.00

:]

 

[Poodles]

with 550's...

 

[7MGFY]

HAC = High altitude compensation sensor. On 87-88 is located right underneath the glove box. On the 89-92 it is internal to ECU.

...Did you see the picture his 7M is in a Mustang I doubt that if it was a pre 89 then anything would be in it's stock mkIII position....

 

[sushi]

I have the gain on my SBC-iD set to 75 and I have no problem. 10.6 all day. At least when I don't have boost leaks that is.

 

[92TealSupra]

550's always helps everything, walbro and fpr too..